tag:blogger.com,1999:blog-31707756073438473572024-02-19T08:30:57.434-08:00Trail-Friendly Radio ExtraE-mail: KI6SN@aol.comRichard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.comBlogger20125tag:blogger.com,1999:blog-3170775607343847357.post-39858621162632313632012-06-19T05:00:00.000-07:002012-06-19T09:31:05.191-07:00An Untanglable Twinlead 20-Meter Dipole<div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5O2OMz2xGEj2NHLMEU9cGZAm-hOr1yLpNOfVmISHx573REK9z3gEnKqju74_NJeW80whC4YK29jguIucxS-xhxGl05rbvFMMrcJyuAl75swAW9EwlaoYAbx524VGTtJn3DnRpHe2LAPI/s1600-h/20-Meter+Folded+Dipole+Illustration.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="353" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5O2OMz2xGEj2NHLMEU9cGZAm-hOr1yLpNOfVmISHx573REK9z3gEnKqju74_NJeW80whC4YK29jguIucxS-xhxGl05rbvFMMrcJyuAl75swAW9EwlaoYAbx524VGTtJn3DnRpHe2LAPI/s400/20-Meter+Folded+Dipole+Illustration.JPG" width="400" /></a></div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><br />
</div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><span style="font-size: small;">The March 2010 <b>Trail-Friendly Radio </b>column in <i><b>WorldRadio Online</b></i> magazine features a 20-meter folded dipole that is great for backpacking. <a href="http://www.cq-amateur-radio.com/WorldRadio.html">Click here to visit the <i><b>WRO</b></i> Web site.</a> It's free.</span></div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><br />
</div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><span style="font-size: small;">The secret for this antenna's success is an <b>easy-to-build L-C matching network,</b> whose <b>schematic</b> is shown above, and <b>pictures </b>below. A <b>center support</b> was fashioned from one-quarter-inch clear plastic and insulated nuts and bolts.</span></div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><br />
</div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><span style="font-size: small;">A view of the antenna's configuration<b> inside the garage at KI6SN</b> during testing is shown at the bottom.</span></div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><br />
</div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: left;"><span style="font-size: small;"><i>For enlarged views, click on the images. </i></span></div><div class="separator" style="clear: both; font-family: Arial,Helvetica,sans-serif; text-align: center;"><span style="font-size: small;"><br />
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</div><div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9rQFEbT5zablSqTMUcQh-zsRtIlahMfQOFgCsys1gbiW0aktE3ftJqWOIJU8j3nEwhyfLHkD63-l7CMtLtscfseKmKxK90s6jXHRIUNkrtdAzL1TZmjbWSrZoIm7WE3_5VQpiSBwDbqU/s1600-h/Folded+Dipole+Test.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9rQFEbT5zablSqTMUcQh-zsRtIlahMfQOFgCsys1gbiW0aktE3ftJqWOIJU8j3nEwhyfLHkD63-l7CMtLtscfseKmKxK90s6jXHRIUNkrtdAzL1TZmjbWSrZoIm7WE3_5VQpiSBwDbqU/s400/Folded+Dipole+Test.JPG" width="400" /></a></div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-89449946191605077842011-11-22T14:49:00.000-08:002011-11-22T14:51:45.242-08:00Schematic of LED Absorptive SWR Bridge-Indicator, Circa 2000, Featured in the January 2012 WRO<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgvPCh1FuMIBZuaqRxMPaE3woTs-XeqNXd2kMiipHZxUGBvulVMZ2QoHoIgO7d2-sCRHB8tt0h-3Gjcsz929mwCggtP1moOCZk-YpvCTVMKY7RHGnRAWmI702UoAJR6hSsVVEKldZg9iaU/s1600/LED-SWR.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgvPCh1FuMIBZuaqRxMPaE3woTs-XeqNXd2kMiipHZxUGBvulVMZ2QoHoIgO7d2-sCRHB8tt0h-3Gjcsz929mwCggtP1moOCZk-YpvCTVMKY7RHGnRAWmI702UoAJR6hSsVVEKldZg9iaU/s400/LED-SWR.JPG" width="310" /></a></div><br />
<span class="Apple-style-span" style="font-family: Arial, Helvetica, sans-serif;">Details on how to build a "cardboarded" - as opposed to a "breadboarded" - version of this T-FR <b>LED Absorptive SWR Bridge-Indicator</b> appears in the <b>January 2012 </b>edition of <b>WorldRadio Online</b> magazine: <a href="http://www.worldradiomagazine.com/">http://www.WorldRadiomagazine.com</a><a href="http://www.blogger.com/"></a></span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com1tag:blogger.com,1999:blog-3170775607343847357.post-50889830307135403482011-05-14T10:16:00.000-07:002011-05-14T10:19:57.653-07:00Reader Feedback: 2-Meter 300-Ohm Twinlead J-Pole, January 2011 WRO<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9BjXeovm1PUqkSb1RDfvGLvabiV_3Q0mZICYuNCJpjhlnBAg_ayn5IC8R4Hwfawm0XW-PfC-o1XwgDy8OFO-WyVeuUwJ5yz5R16N5Nq2z_a2_7A1Xu9tpWqFyeIWaEoOdOpZyH-LB0YU/s1600/J-pole+Chart.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9BjXeovm1PUqkSb1RDfvGLvabiV_3Q0mZICYuNCJpjhlnBAg_ayn5IC8R4Hwfawm0XW-PfC-o1XwgDy8OFO-WyVeuUwJ5yz5R16N5Nq2z_a2_7A1Xu9tpWqFyeIWaEoOdOpZyH-LB0YU/s320/J-pole+Chart.jpg" width="284" /></a></div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
<span style="font-size: small;">I was quite interested to read the article on the “Loose-Wire Double Radiator 300 ohm<br />
Twinlead 2-meter J-Pole antenna” in the January issue of WRO.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
From what I understand, this is a modification of a J-Pole, modeled by the late L.B. Cebik,<br />
taking into account the unconnected “loose wire” opposite the normal ½ wave radiator.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
This design is also based on what Cebik calls “a non-standard” J-Pole design, where the ½ wave element is made shorter than a “normal” ½ wavelength, and the ¼ wave matching section is made longer than a “normal” ¼ wavelength.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
What concerned me, however, was that the build dimensions published for the J-pole construction, appear to be those taken from what Cebik calls his "...bare-wire proof of<br />
principle model”.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
Note especially this term “bare-wire”, which clearly could not apply to anything made<br />
from 300-ohm plastic insulated twinlead. Cebik also repeats several times throughout<br />
his text, his reference to his "...bare-wire proof of principle model”.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
Cebik points out that there are many varieties and shapes of flat, insulated, twinlead,<br />
making modeling with antenna design software like NEC-4 a challenge, so he states<br />
that "Therefore, models of twinlead must begin with bare-wire versions, with the caution<br />
that the dimensions that emerge may not be close to the dimensions demanded by<br />
vinyl-covered twinlead."</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
In other words, Cebik does not expect his "...bare-wire proof of principle model” to be<br />
built as-is, without substantially modifying the theoretical dimensions, to account for the<br />
effect of both wire insulation and most importantly the velocity factor of the particular<br />
twinlead used.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
I still can’t quite believe that many hams could have built up J-Poles using these<br />
dimensions, without finding performance issues. Also strangely, in all the positive<br />
reports that WRO mentions, no one seems to have actually measured SWR! I keep<br />
looking for some other rational explanation, but it still looks to be related to misinterpretation<br />
of Cebik’s “bare-wire proof of principle model”.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
In order confirm this to myself, I have built a J-Pole as close as possible to the<br />
information provided in the WRO January 2011 issue. Although I could not obtain any of<br />
the pictured semi-clear TV twinlead, (no longer available) I doubt that it would have<br />
made any difference.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
The Twinlead I used was Radio Shack # 15-1174, with a published velocity factor (Vf) of<br />
0.733. (in my testing I measured the actual Vf on a sample as 0.77)<br />
<br />
To sum up, my findings were that for the J-Pole sample I built from the published<br />
dimensions, the swr performance is extremely poor. The SWR was high across the<br />
band from 144 - 149 MHz (9.2 – 4.5) and was not resonant anywhere.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
Frankly, I would not want to use this antenna on any radio of mine.<br />
Details of my results are given in the table that follows the text.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
You will see that I tried to modify some of the published dimensions by adjusting some<br />
of them for Vf, and obtained at least some improvements over the original test results.<br />
These “experiments” are highlighted in the table.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
In the end, it proved a larger task than I was prepared to continue, to come up with a<br />
final set of dimensions that would yield a resonant low-SWR design from Cebik’s model.<br />
I have included the dimensions below only to illustrate what I had done.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
For comparison purposes, I also measured using the same set-up, a “conventional”<br />
twinlead J-Pole I made some years ago based up a design published in the 1994<br />
September QST issue.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
This J-Pole clearly outperforms the WRO J-Pole under discussion.<br />
There are many references in the literature illustrating practical dimensions for similar<br />
“conventional” or standard twin-lead J-Poles.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
I have listed some below:</span><br />
<span style="font-size: small;"><br />
“The DBJ-2: A Portable VHF-UHF Roll-Up J-pole…”, QST March 2007<br />
“More on the Ribbon J-Pole Antenna”, QST June 2003<br />
“The DBJ-1: A VHF-UHF Dual Band J-Pole”, QST February 2003<br />
“The Twin-lead J-Pole” by WB3GCK, 1998<br />
“An Easy Dual Band VHF-UHF Antenna”, QST September 1994<br />
“144-148 MHz PVC Water Pipe J-Pole antenna”, K5LN, 6/22/97<br />
“The 300-ohm Ribbon J Antenna for 2 meters; A Critical Analysis”, April 1982</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
Sincerely,</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><br />
Don Dorward, VA3DDN</span></div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com2tag:blogger.com,1999:blog-3170775607343847357.post-87297542475851884502010-10-21T07:08:00.000-07:002010-10-21T07:08:04.225-07:00KI6SN T-FR Single-Lever CW Paddle<div style="font-family: Arial,Helvetica,sans-serif;"><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;">November 2010's <b>Trail-Friendly Radio,</b> in <i><b>Worldradio Online</b></i> magazine by Richard Fisher, KI6SN, features a <b>modified version of NB6M's renowned single-lever CW paddle</b> you can build. It's <b>fortified for rugged field operation.</b> <a href="http://www.worldradiomagazine.com/">Click here to see the full article.</a> Additional photographs and dimensions for the paddle's dual-sided PC board parts are shown below.</div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXDa1IVohZ7Ckv4sRKY6ifFNQ1lqDq56rkv8BvMWrf808vlgUflIMpGHTVPTperA3pYcmXmqey0enyXmCRAgNWkQ34m3UtdtAXdkHtSag88fqfxtgb9sZB5cic5V14OXQYKoi1_TqgjMA/s1600/DSCN3030.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXDa1IVohZ7Ckv4sRKY6ifFNQ1lqDq56rkv8BvMWrf808vlgUflIMpGHTVPTperA3pYcmXmqey0enyXmCRAgNWkQ34m3UtdtAXdkHtSag88fqfxtgb9sZB5cic5V14OXQYKoi1_TqgjMA/s400/DSCN3030.JPG" width="400" /></a></div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
</div><div style="font-family: Arial,Helvetica,sans-serif; text-align: center;"><i>For an enlarged view, click on the images</i></div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-88357039536986871962010-05-21T10:19:00.000-07:002010-05-21T10:23:28.838-07:00'Where Am I Going to Operate?' - Frequencies<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMX82_fdzgiU2OBT06VirnSh3ggzse9I1rgzpPTnoYKl2KW6IvsW_KIW6mlYFKjUNZbEX0sRnoB9fsTX7FFTbm-1B3t2YFnQlm2vzHqni2caSYfoAIEso_E-KCioErlRis-PNIEqJT5WM/s1600/T-FR+Operating+Frequencies+-+JPEG.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMX82_fdzgiU2OBT06VirnSh3ggzse9I1rgzpPTnoYKl2KW6IvsW_KIW6mlYFKjUNZbEX0sRnoB9fsTX7FFTbm-1B3t2YFnQlm2vzHqni2caSYfoAIEso_E-KCioErlRis-PNIEqJT5WM/s400/T-FR+Operating+Frequencies+-+JPEG.JPG" width="400" /></a></div><div style="text-align: center;"><br />
</div><div style="text-align: center;"><span style="font-size: small;"><i>For an enlarged view, click on the image.</i></span></div><br />
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<div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;"><b>Darrell Swenson, KØAWB,</b> of Omaha, Nebraska, put together this handy chart of HF and VHF frequencies regularly monitored by various amateur communities and organizations. It can be printed out and used as a handy "cheat sheet" for determining on what frequencies to operate when on trail-friendly radio expeditions.</span></div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><span style="font-size: small;">Additions and corrections to the chart are welcome. Please write <b>Trail-Friendly Radio columnist Richard Fisher, KI6SN, at KI6SN@aol.com.</b></span></div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
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</i></span></div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-62943283897635694732010-04-12T11:38:00.000-07:002010-04-12T11:38:11.931-07:00KI6SN LM380 Audio Amplifier For the Field<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjp0CvaGgpxV4oWBg0oi1kcRhzpgPHBtedKkChvCP2_rMkXrOsn_3Ppoa2FRqrGYw0_sTnD4Pl7xEGBPf5CtdDWi4fDtj7JONwlExuKuDRsqU6g3H65w2REb2EGCk_MNcDzmibIWiZaDTw/s1600/LM380+-+A.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="351" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjp0CvaGgpxV4oWBg0oi1kcRhzpgPHBtedKkChvCP2_rMkXrOsn_3Ppoa2FRqrGYw0_sTnD4Pl7xEGBPf5CtdDWi4fDtj7JONwlExuKuDRsqU6g3H65w2REb2EGCk_MNcDzmibIWiZaDTw/s400/LM380+-+A.JPG" width="400" /></a></div><br />
<span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;"><b>KI6SN's Trail-Friendly Radio column</b> in the May 2010 edition of <b><a href="http://www.worldradiomagazine.com/"><i>WorldRadio Online</i></a> </b>magazine<b> </b>features an <b>easy-to-build audio amplifier</b> that's great for adding headphone punch in the field. Utilizing a 14-pin <b>LM380 / NTE740A chip,</b> the circuit requires only a small handful of parts.</span></span><br />
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<span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;">Here are some photos of the KI6SN version of the amplifier:</span></span><br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOdZDmEAYukgSN56aVeXam_Awrk4FCgZ_s_h9uSLD9onseeDg6uOVVpUcdhRwmdO1rRNPIHXYD0_-y6Xt7cejx9dR469xG4VOYZbJG6h7iSwaXX_nukIZtb68jKmrmAIndNl1acz8r2MQ/s1600/LM380+-+C.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="317" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOdZDmEAYukgSN56aVeXam_Awrk4FCgZ_s_h9uSLD9onseeDg6uOVVpUcdhRwmdO1rRNPIHXYD0_-y6Xt7cejx9dR469xG4VOYZbJG6h7iSwaXX_nukIZtb68jKmrmAIndNl1acz8r2MQ/s400/LM380+-+C.JPG" width="400" /></a></div><br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMZ2dpoYSaRcQttOf_3I8VujMEZuFE2lWivFg0F17_hnuWw9WR0KkCI6eHafnDOC7qlIBoVcFl3aUnpBhZOUbK_s3OzEk8or5WoVXLW2WdqB-wfADd7bBLei3k5issqHiJa5VQbf6a9NA/s1600/DSCN2716.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="291" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMZ2dpoYSaRcQttOf_3I8VujMEZuFE2lWivFg0F17_hnuWw9WR0KkCI6eHafnDOC7qlIBoVcFl3aUnpBhZOUbK_s3OzEk8or5WoVXLW2WdqB-wfADd7bBLei3k5issqHiJa5VQbf6a9NA/s400/DSCN2716.JPG" width="400" /></a></div><br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfGwW4J3uHqZzHxQZXyyxZIyYwCCmQUAJhyphenhyphen_IvpJ8-AQRQic0Q-SGwAwkeABdbqLTHymbyoiJ4s2W0CuZDVUr78J5BznhrAPNEwh1owkjF1kdVEwN2gw856yYlgg-ntTV-AmDNb_SjX0o/s1600/LM380+-+G.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfGwW4J3uHqZzHxQZXyyxZIyYwCCmQUAJhyphenhyphen_IvpJ8-AQRQic0Q-SGwAwkeABdbqLTHymbyoiJ4s2W0CuZDVUr78J5BznhrAPNEwh1owkjF1kdVEwN2gw856yYlgg-ntTV-AmDNb_SjX0o/s400/LM380+-+G.JPG" width="400" /></a></div><span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;"> </span></span><br />
<span style="font-size: small;"><i><span style="font-family: Arial,Helvetica,sans-serif;">For an enlarged view, click on the images.</span></i></span><br />
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<b><span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;">Links to parts sources for the amplifier include: </span></span></b><br />
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<a href="http://www.danssmallpartsandkits.net/"><span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;">Dan's Small Parts and Kits</span></span></a><br />
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<a href="http://www.digikey.com/"><span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;">Digi-Key Corp.</span></span></a><br />
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<span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;"><a href="http://www.mouser.com/">Mouser Electronics</a></span></span><br />
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<span style="font-size: small;"><span style="font-family: Arial,Helvetica,sans-serif;"> </span></span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com1tag:blogger.com,1999:blog-3170775607343847357.post-60510549976708911722010-03-19T14:44:00.000-07:002010-03-19T14:44:49.448-07:00Feedback On the KI6SN OM Antenna Mast<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgs13aPEyA8IK0iRX5u07_TSYn5OhOLeMoS6SCaqkEexc2abKZDI6280sjfdivqcaBr5kJ3llUkli1qF5pzTXp3hBFuaBByeWsmFwJ8utW3a20xMp5MxGS4AACARBiiMWCx4AzU6EN7D8E/s1600-h/N2EIK+Bottom.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="397" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgs13aPEyA8IK0iRX5u07_TSYn5OhOLeMoS6SCaqkEexc2abKZDI6280sjfdivqcaBr5kJ3llUkli1qF5pzTXp3hBFuaBByeWsmFwJ8utW3a20xMp5MxGS4AACARBiiMWCx4AzU6EN7D8E/s400/N2EIK+Bottom.jpg" width="400" /></a></div><span style="font-family: Arial,Helvetica,sans-serif; font-size: small;"> </span><br />
<span style="font-family: Arial,Helvetica,sans-serif; font-size: small;"> This photo shows the bottom portion of N2EIK's PVC mast arrangement.</span><br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEolD9U3gUjfdHKcZZSZnwy-qB_n9X-V3rVtF1gs1l7_tDcD3HPOdOycMxCnXwmctdjT-KqKsXiqDkwOiWTSM-B7lU0SII4iXsifqQdBjo0lVJ33eZMt9uGkkHKmIqBi_C7A-Vz2T0ltc/s1600-h/N2EIK+Mid.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="301" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEolD9U3gUjfdHKcZZSZnwy-qB_n9X-V3rVtF1gs1l7_tDcD3HPOdOycMxCnXwmctdjT-KqKsXiqDkwOiWTSM-B7lU0SII4iXsifqQdBjo0lVJ33eZMt9uGkkHKmIqBi_C7A-Vz2T0ltc/s400/N2EIK+Mid.jpg" width="400" /></a></div><span style="font-family: Arial,Helvetica,sans-serif; font-size: small;"><br />
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<span style="font-family: Arial,Helvetica,sans-serif; font-size: small;">Here's the mid-portion of the mast at N2EIK.</span><br />
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<div class="separator" style="clear: both; text-align: center;"></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfCcOU3xpPNz8xLJmv5q_Vfj6bCpVbl6Adr6_0JLwXXIP3XeqyKCOnFB-ZJoQwMCzZp4sV7TVw-gzpcIUKkW609yikQ_JR7QlAgjkipVAgpBQMKNWO7GQznKI0aQctGdXxo13uLCK_eoU/s1600-h/N2EIK+Top.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="236" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfCcOU3xpPNz8xLJmv5q_Vfj6bCpVbl6Adr6_0JLwXXIP3XeqyKCOnFB-ZJoQwMCzZp4sV7TVw-gzpcIUKkW609yikQ_JR7QlAgjkipVAgpBQMKNWO7GQznKI0aQctGdXxo13uLCK_eoU/s400/N2EIK+Top.jpg" width="400" /></a></div><span style="font-family: Arial,Helvetica,sans-serif; font-size: small;"><br />
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<span style="font-family: Arial,Helvetica,sans-serif; font-size: small;"> A look at the top portion of the mast at N2EIK.</span><br />
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<a href="http://www.bookrags.com/research/eulers-laws-of-motion-wom/"><span style="font-family: Arial,Helvetica,sans-serif; font-size: small;">Click here for a look at Euler’s Laws.</span></a><br />
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<span style="font-family: Arial,Helvetica,sans-serif; font-size: small;"><a href="http://sites.google.com/site/kk0gamateurradio/"> Click here to see more photographs of KCØBMF’s PVC antenna mast.</a> Look on the left side, click on Field Day and then look at 2009.<br />
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<a href="http://www.worldradiomagazine.com/wro_issues/2010/WRO_01_2010.pdf">Click here to view the January 2010 Trail-Friendly Radio column featuring the KI6SN OM Mast. </a></span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-77718757650042749812010-01-19T11:06:00.000-08:002010-01-19T11:06:54.017-08:00Diana Eng, KC2UHB: From the 'Runway' to the trail<div class="separator" style="clear: both; text-align: center;"><object height="344" style="clear: left; float: left;" width="425"><param name="movie" value="http://www.youtube.com/v/lCuGf21tGSc&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/lCuGf21tGSc&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object><br />
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<span style="font-size: small;"><b>Diana Eng, KC2UHB,</b> a star of the hit Bravo reality series <b><i>Project Runway,</i></b> has the lead role in her own You Tube video: <i><b>How To: Set Up An HF portable radio while hiking. </b></i>The world-renowned fashion designer and author of </span><i><span style="font-size: small;"><b>Fashion Geek: Clothes Accessories Tech, </b></span></i><span style="font-size: small;">enjoys trail-friendly radio as a way to get out of the concrete canyons of New York City and onto the hiking trails of New Jersey, Connecticut and beyond.</span><br />
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<span style="font-size: small;">Featured in <b>KI6SN's Trail-Friendly Radio</b> column in the February 2010 edition of <a href="http://www.cq-amateur-radio.com/WorldRadio.html"><i><b>WorldRadio Online,</b></i></a> 'UHB often goes on T-FR excursions with David Clausen, W2VV; and Tom Tumino, N2YTF. Here's a gallery of photographs from some of their outdoor adventures - which include sojourns to New Jersey, Connecticut, Turks and Caicos Islands and satellite operation from NYC.<br />
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</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDWugknyhq5lzg1dVTuqaXTqp-UQvTJOu2M03_raJe0qcT48W9uCrExo6b6J_0mLWG7lUOFpFPFD2oxSss2z_I2VzV5Y069byCFFtKdH1h4GIfdDSlLXEk7m71rV6UqCrhh7TbwxcxC5s/s1600-h/rooftopantenna.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDWugknyhq5lzg1dVTuqaXTqp-UQvTJOu2M03_raJe0qcT48W9uCrExo6b6J_0mLWG7lUOFpFPFD2oxSss2z_I2VzV5Y069byCFFtKdH1h4GIfdDSlLXEk7m71rV6UqCrhh7TbwxcxC5s/s640/rooftopantenna.jpg" /></a><br />
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<div class="separator" style="clear: both; text-align: left;"><b>ABOVE:</b> KC2UHB in New York City, above, holds a hand-held antenna in preparation for making VHF/UHF contacts via a passing satellite.<br />
</div><div class="separator" style="clear: both; text-align: left;"><b>BELOW:</b> An engraved plate marks the summit of Mt. Carmel in Connecticut.<br />
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</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgc9TbRLkD6Ozy7zaosMx6OG5Kd1dXfjjv5844imZxqTPqkVP5iwxIxPCOIYENLCAfvuzH7mcrAErSQgq5C4OOAbFBrZAFmMqKoT5k4KGiLrPnf-NjACir58jZf69hb0BXfXDJugn5fphY/s1600-h/KC2UHB+-+Mt.+Carmel.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"> <img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgc9TbRLkD6Ozy7zaosMx6OG5Kd1dXfjjv5844imZxqTPqkVP5iwxIxPCOIYENLCAfvuzH7mcrAErSQgq5C4OOAbFBrZAFmMqKoT5k4KGiLrPnf-NjACir58jZf69hb0BXfXDJugn5fphY/s640/KC2UHB+-+Mt.+Carmel.jpg" /></a><br />
</div><div style="font-family: inherit;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2XfYLe3zFo47NgUyZvd4kYtUMlvFe5B6pr6wiGKTO1VvSb_yezvSME1LXcVIaKz1uV6yTD3PkTVn4qZK1V1pCSAqwLxp_s84wkrx-_DCTFTBT4pEzwKALOJN8nkasQqgzoWUp1YzTxz0/s1600-h/KC2UHB+-+Mt.+Carmel+Summit+-+A.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2XfYLe3zFo47NgUyZvd4kYtUMlvFe5B6pr6wiGKTO1VvSb_yezvSME1LXcVIaKz1uV6yTD3PkTVn4qZK1V1pCSAqwLxp_s84wkrx-_DCTFTBT4pEzwKALOJN8nkasQqgzoWUp1YzTxz0/s640/KC2UHB+-+Mt.+Carmel+Summit+-+A.jpg" /></a><br />
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<div class="separator" style="clear: both; text-align: left;"><b>ABOVE:</b> KC2UHB relaxes during a recent T-FR outing.<br />
</div><div class="separator" style="clear: both; text-align: left;"><b>BELOW:</b> KC2UHB and N2YTF ready their radio gear before hitting the trail.<br />
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</div><div class="separator" style="clear: both; text-align: left;"><b>ABOVE:</b> At an indoor operating post, KC2UHB listen while she tunes.<br />
</div><div class="separator" style="clear: both; text-align: left;"><b>BELOW:</b> Operating VP5 from Turks and Caicos Islands in the Caribbean, 'UHB makes HF contacts near the beach.<br />
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</div><div class="separator" style="clear: both; text-align: left;"><b>BELOW:</b> Diana Eng, KC2UHB, and Dave Clausen, W2VV, pose for a picture during a T-FR outing. <br />
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<i><b>(Photography courtesy of Dave Clausen, W2VV)</b></i><br />
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</div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-48875248593055796552009-12-15T12:44:00.000-08:002009-12-15T12:44:29.380-08:00The KI6SN 'Old Man' Mast - Bending all the rules<div style="font-family: inherit;"><br />
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</div><div style="font-family: inherit;"><span style="font-family: Arial,Helvetica,sans-serif;">The January 2010 edition of <a href="http://www.cq-amateur-radio.com/WorldRadio.html"><i><b>WorldRadio Online's</b></i></a> Trail-Friendly Radio column features the <b>KI6SN "Old Man Mast,"</b> an easy-to-carry, lightweight mast that is particularly useful for field operation where antenna supports are few and far between - such as above the treeline on mountain-top excursions.</span><br />
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</div><div style="font-family: inherit;"><span style="font-family: Arial,Helvetica,sans-serif;">The antenna derives its name from the Old Man's <b>crooked stature,</b> due to the <b>many PVC joints</b> along its length. The antenna support may suffer from a case of scoliosis, but it's a trusty, solid performer that can get your skywires to where they might not otherwise go. <br />
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</div><div style="font-family: inherit;"><span style="font-family: Arial,Helvetica,sans-serif;">This illustration above shows the nuts-and-bolts of the "Old Man," even though it's made solely of PVC materials</span><br />
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</div><div style="font-family: inherit;"><span style="font-family: Arial,Helvetica,sans-serif;">Several PVC joints connect the short sections of PVC mast material:</span><br />
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</div><div style="font-family: inherit;"><span style="font-family: Arial,Helvetica,sans-serif;">The "Old Man" is <b>guyed at two different heights</b> to achieve <b>strength</b> and <b>stability.</b> Here's a shot of the upper guy:</span><br />
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</div><div style="font-family: inherit;"><span style="font-family: Arial,Helvetica,sans-serif;">The following <b>three photographs</b> show the method for <b>determining the circumference</b> of the circle that marks where your <b>guying stakes</b> will be placed:</span><br />
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</div><div style="font-family: inherit;"><span style="font-family: Arial,Helvetica,sans-serif;">The mast is put up in <b>two phases.</b> Pictured below is what the top of the <b>first phase</b> looks like. The <b>upper portion of the antenna is added</b> to the PVC joint coupling shown here (after the lower portion's guy lines are already staked in place):</span><br />
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</div><div style="font-family: inherit;"><a href="http://www.youtube.com/watch?v=1jkN3K5G8eE"><span style="font-family: Arial,Helvetica,sans-serif;">Click here to see a video describing how to tie a taut-line hitch knot.</span></a><br />
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</div><div style="font-family: inherit;"><i><span style="font-family: Arial,Helvetica,sans-serif;">For an enlarged view, click on the illustrations. </span></i><br />
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</div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-48919940295782548432009-11-14T10:44:00.000-08:002009-12-15T12:47:49.536-08:00WA3ZBJ takes field-based antennas to a new height<div style="font-family: Arial,Helvetica,sans-serif;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf31FEGIlOsBkF5yZ0OXkgyk0nvWoMWW_cPJkEerifIIgoUipVUl6NvgHWhv9fwArzFsbZvVS3yiLv-4qFqRWaf7IxFvDx0VtRWdHOrQij9xohWjQhGcK9xtc32Pqqho3a6-dpK7m1b2w/s1600-h/WA3ZBJ+-+F.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf31FEGIlOsBkF5yZ0OXkgyk0nvWoMWW_cPJkEerifIIgoUipVUl6NvgHWhv9fwArzFsbZvVS3yiLv-4qFqRWaf7IxFvDx0VtRWdHOrQij9xohWjQhGcK9xtc32Pqqho3a6-dpK7m1b2w/s400/WA3ZBJ+-+F.jpg" /></a><br />
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As featured in KI6SN's December '09 <b>Trail-Friendly Radio</b> column in <a href="http://www.cq-amateur-radio.com/WorldRadio.html"><i><b>WorldRadio Online </b></i>magazine,</a> <b>Don McBride, WA3ZBJ,</b> operated a newly-completed Hendricks QRP PFR-3, above, “from a great spot near a fire watch tower on a hilltop in Cook Forest State Park in Pennsylvania.” His favorite portable antenna is a jumper dipole “for 20-30-40 suspended in an inverted V configuration from one of the many trees in the area and fed with lightweight coax.”<br />
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</div><div style="font-family: Arial,Helvetica,sans-serif;">With a set-up along the St. Johns River in <b>DeLand FL,</b> 'ZBJ used a <b>Wilderness Radio Sierra transceiver </b>portable with an inverted V antenna suspended from <b>33-foot pole</b> (left).<br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAo4iQ8pArkQuy4g9Nn18Yv5-0d8WnJCtfyrDjyMpNCPEKkzwoE2nems06JfxuO0nsPdv_vzA2khDUJQ1S1Ih2p2cKtHxvSdMW6F8ZSnf6BmK9NluMH6Or1XDwCJvlXdQHeAaOmvXys7o/s1600-h/Golf+Ball+T-FR+Antenna+Launcher.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAo4iQ8pArkQuy4g9Nn18Yv5-0d8WnJCtfyrDjyMpNCPEKkzwoE2nems06JfxuO0nsPdv_vzA2khDUJQ1S1Ih2p2cKtHxvSdMW6F8ZSnf6BmK9NluMH6Or1XDwCJvlXdQHeAaOmvXys7o/s400/Golf+Ball+T-FR+Antenna+Launcher.JPG" /></a><br />
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<span style="font-family: Arial,Helvetica,sans-serif;">'ZBJ says that putting an <b>eye-hook into a used golf ball</b> makes for a great launch vehicle when the goal is to get your antenna as high into a tree as possible. Tie lightweight nylon line through the eye and you've got a wonderful projectile for those out-of-reach branches. It's <b>quick </b>and <b>inexpensive</b> to make and <b>lightweight</b> and <b>easy to carry</b> into the field.</span><br />
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<span style="font-family: Arial,Helvetica,sans-serif;"><b>QUICK LINKS: </b><br />
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<div style="font-family: Arial,Helvetica,sans-serif;"><a href="http://www.dbara.org/">Click here for a link to the Daytona Amateur Radio Association Web site.</a><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><a href="http://www.blogger.com/goog_1258225265681"><br />
</a><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><a href="http://www.arm-tek.net/%7Eyoel/">Click here for a link to the North American QRP CW Club Web site.</a><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><a href="http://css.answerbag.com/articles/video/How-to-Tie-a-Scaffold-Knot/fa8b565f-d1b7-2d8a-6189-4c018d487b1f">Click here to see an instructional video on tying the Scaffold knot, suggested by Bruce Prior, N7RR. </a><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><a href="http://css.answerbag.com/articles/video/How-to-Tie-a-Multiple-Scaffold-Knot/d8c08bdd-4e37-6998-386a-dd97730e663c">Click here to see an instructional video on tying the Multiple Scaffold knot. </a><br />
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</div><div style="font-family: Arial,Helvetica,sans-serif;"><a href="http://www.youtube.com/watch?v=1jkN3K5G8eE">Click here to see an instructional video on tying Tautline Hitch knot.</a><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><br />
</div><div style="font-family: Arial,Helvetica,sans-serif;"><i>(For an enlarged view, click on the images)</i><br />
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</div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-62806137415559776922009-10-19T08:37:00.000-07:002009-10-19T17:41:48.784-07:00A simple, useful tuner for the venerable EFHW<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjWLmfq5r4vzJQQQhKL0avzbhy4fZhZzf5giFKkR1-70SE_ReO7ahCmMaZH1gOMUt3A3M-kzDQFwPGe0yYSzalC2SC7K8yCvw6X7pdtpNQCh1kTjsg3E_YtlTxUU4SdFyBnMLJJVdwD9cQ/s1600-h/End-Fed_Tuner.bmp"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 247px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjWLmfq5r4vzJQQQhKL0avzbhy4fZhZzf5giFKkR1-70SE_ReO7ahCmMaZH1gOMUt3A3M-kzDQFwPGe0yYSzalC2SC7K8yCvw6X7pdtpNQCh1kTjsg3E_YtlTxUU4SdFyBnMLJJVdwD9cQ/s400/End-Fed_Tuner.bmp" alt="" id="BLOGGER_PHOTO_ID_5380605734456029618" border="0" /></a>KI6SN's <span style="font-weight: bold;">November 2009 Trail-Friendly Radio</span> column in <span style="font-weight: bold; font-style: italic;">WorldRadio Online</span> magazine focused on a useful, popular and easy-to-manage HF field antenna: the <span style="font-weight: bold;">EFHW</span> - or End Fed Half Wave, with a <span style="font-weight: bold;">counterpoise.</span><br /><br />Above, you'll see the <span style="font-weight: bold;">schematic for a simple EFHW tuner</span> for the popular 40- and 20-meter CW bands. <span style="font-weight: bold;">Dan Tayloe, N7VE; Charlie Lofgren, W6JJZ; Bill Jones, KD7S;</span> and David Bixler, W<span style="font-family:Arial;">Ø</span>CH; share design credit for the tuner and LED-based SWR bridge.<br /><br /><br /><span style="font-family:Arial;"><o:p></o:p></span> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDOlIhvy8NVNEqG0NMF5jG-3vIZcZVbBgHQR1dv2R3e2wJ__42ZU-FUzhyphenhyphenDKc0OArymP9lhVsb1ejDZ0SLqH0GjUtZ_J9BXD-0rrDrArnJTN2xVMKOn-mX7R4ooYPj4g-XBaxou9qVyFs/s1600-h/DSCN2296.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDOlIhvy8NVNEqG0NMF5jG-3vIZcZVbBgHQR1dv2R3e2wJ__42ZU-FUzhyphenhyphenDKc0OArymP9lhVsb1ejDZ0SLqH0GjUtZ_J9BXD-0rrDrArnJTN2xVMKOn-mX7R4ooYPj4g-XBaxou9qVyFs/s400/DSCN2296.JPG" alt="" id="BLOGGER_PHOTO_ID_5380606294645260210" border="0" /></a><br /><span style="font-style: italic;">(For an enlarged view, click on the images.)</span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-81749101012243500822009-09-12T08:52:00.000-07:002009-09-12T09:12:02.128-07:00High-flying with the Bottle Bag Antenna Launcher<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4dAeNJ-j2kSyEQb2RgrYtoBdfSFYv2qmjJcN9f9QjfE-uzMEwv4buQ0ZzoP27eONXo1bVJnxjYWnp5dPtDts1HZsZwJtvpMtd10vpXMgk9ekc2k2kelNPucLNP_GfDxyGiTNnL-pFRO4/s1600-h/Bottle+Bag+-+D.jpg"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 350px; height: 263px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4dAeNJ-j2kSyEQb2RgrYtoBdfSFYv2qmjJcN9f9QjfE-uzMEwv4buQ0ZzoP27eONXo1bVJnxjYWnp5dPtDts1HZsZwJtvpMtd10vpXMgk9ekc2k2kelNPucLNP_GfDxyGiTNnL-pFRO4/s400/Bottle+Bag+-+D.jpg" alt="" id="BLOGGER_PHOTO_ID_5380613605186738338" border="0" /></a><br />The <span style="font-weight: bold;">Trail-Friendly Radio</span> column by <span style="font-weight: bold;">KI6SN</span> in the <span style="font-weight: bold;">October 2009 edition</span> of <span style="font-weight: bold; font-style: italic;">WorldRadio Online</span> magazine features a simple antenna launching scheme known as the <span style="font-weight: bold;">Bottle Bag.</span> Accompanying photographs show the bag's configuration for both carrying and launching.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjn77Ehbm3C-eDZfh-AxknO1SWQG9yvCS4Yj42ePk5kcI05Gr3ug1oK5KEiqpR6BS5UuUM6WYcsLiNds317wC2xrlJCJz59uqQojER-kq8iWbq7vgT84NMEDxzlGoO1-pwrjlVsWMbsS78/s1600-h/Bottle+Bag+-+B.jpg"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 350px; height: 263px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjn77Ehbm3C-eDZfh-AxknO1SWQG9yvCS4Yj42ePk5kcI05Gr3ug1oK5KEiqpR6BS5UuUM6WYcsLiNds317wC2xrlJCJz59uqQojER-kq8iWbq7vgT84NMEDxzlGoO1-pwrjlVsWMbsS78/s400/Bottle+Bag+-+B.jpg" alt="" id="BLOGGER_PHOTO_ID_5380613519917482978" border="0" /></a><br /><br /><a href="http://www.youtube.com/watch?v=8Laq3AFmoUw">Click here to see a video on how to tie a <span style="font-weight: bold;">bowline knot,</span> which is useful in using this launching method.</a><br /><br />Also, you may want to check out <span style="font-weight: bold; font-style: italic;">"In the Bag: Throwing Antenna Woes to the Wind"</span> by <span style="font-weight: bold;">John Kalotai, N1OLO, </span>which was published in the <span style="font-weight: bold;">Adventure Radio Society's ARS Sojourner</span> online magazine in <span style="font-weight: bold;">2005.</span> <a href="http://www.adventure-radio.org/ars/pages/back_issues/2005_text/0505_text/N1OLO.html">Click here for the link.</a><br /><br /><a href="http://www.cq-amateur-radio.com/WorldRadio.html">Click here for the latest edition of WorldRadio Online magazine.</a> It's free.<br /><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJWPdSmvOlsQu1cG8K7tzg1pFUVuzDpNLesAO47ayI7Ju0JJMiWS6QYLKKSY12u9HScRmzJPABRd_kUYg44JwbyuY2GSCZ6oNIMB1wgj1ZL6I-TJiU1CQkCuI0fbQSanPHIeVmc53CnkE/s1600-h/Bottle+Bag+-+A.jpg"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 350px; height: 263px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJWPdSmvOlsQu1cG8K7tzg1pFUVuzDpNLesAO47ayI7Ju0JJMiWS6QYLKKSY12u9HScRmzJPABRd_kUYg44JwbyuY2GSCZ6oNIMB1wgj1ZL6I-TJiU1CQkCuI0fbQSanPHIeVmc53CnkE/s400/Bottle+Bag+-+A.jpg" alt="" id="BLOGGER_PHOTO_ID_5380613398136735794" border="0" /></a><br /><span style="font-style: italic;">(For an enlarged view, click on the images.)</span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com1tag:blogger.com,1999:blog-3170775607343847357.post-70595463793103169232009-08-21T08:46:00.000-07:002009-08-23T14:16:24.018-07:00W6JRY reflections on the PRC-64 'Spy Radio'<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-S41wN7Pvo1YTDTlTn5yfDqUieHd_IbOBcptHhw0T_6eCiye78SxW4JVf3bf6dvmr5aT6kBs-Shv7N1FFdmZjUWNz9W7fguWAv2HAAUCeclhrNQkzzdpf7g45zl0QgaGDKvV4eznIVN4/s1600-h/W6JRY+QSL+Radio.jpg"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 291px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-S41wN7Pvo1YTDTlTn5yfDqUieHd_IbOBcptHhw0T_6eCiye78SxW4JVf3bf6dvmr5aT6kBs-Shv7N1FFdmZjUWNz9W7fguWAv2HAAUCeclhrNQkzzdpf7g45zl0QgaGDKvV4eznIVN4/s400/W6JRY+QSL+Radio.jpg" alt="" id="BLOGGER_PHOTO_ID_5372445455117507218" border="0" /></a><br /><br />The <span style="font-weight: bold;">September 2009 Trail-Friendly Radio</span> column in <span style="font-weight: bold; font-style: italic;">WorldRadio Online</span> magazine features a retrospective on the <span style="font-weight: bold;">Vietnam-era PRC-64 "Spy Radio."</span> Jerry Fuller, W6JRY, shared his insights on restoration of this renowned trail-friendly radio and his experiences using it on the air.<br /><br /><a href="http://www.dtic.mil/cgi-bin/GetTRDoc?AD=AD813297&Location=U2&doc=GetTRDoc.pdf"><span style="font-weight: bold;">Click here to view a military paper</span></a> dated April 1967 by Stanley D. Peirce of the U.S. Army War Laboratory at Aberdenn Proving Ground, Maryland, that chronicles the research and development of the PRC-64. <span style="font-style: italic;">(Please allow a few minutes for this PDF to download.)</span><br /><br />For an <span style="font-weight: bold;">UNCLASSIFIED assessment</span> of this famed spy radio, <a href="http://www.dtic.mil/cgi-bin/GetTRDoc?AD=AD464299&Location=U2&doc=GetTRDoc.pdf"><span style="font-weight: bold;">click here.</span></a><br /><br />Below is a photograph of <span style="font-weight: bold;">W6JRY</span> at the helm of his Forest Ranch, CA station.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiO1OdV2XoSKTC5OwLm90H21uyxTgvvoHdsKXVl6J_L7nx2mzFne0XY-SR1EtRX6Z-OYPLFMPB4gPQODDJxcNgqth5mqaEI7i2TOWNJ0INbP9br8Lwuj2WO6HBTsdAs_j5zMdqL7zoMmLM/s1600-h/w6jry.jpg"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiO1OdV2XoSKTC5OwLm90H21uyxTgvvoHdsKXVl6J_L7nx2mzFne0XY-SR1EtRX6Z-OYPLFMPB4gPQODDJxcNgqth5mqaEI7i2TOWNJ0INbP9br8Lwuj2WO6HBTsdAs_j5zMdqL7zoMmLM/s400/w6jry.jpg" alt="" id="BLOGGER_PHOTO_ID_5372449030258658994" border="0" /></a>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com1tag:blogger.com,1999:blog-3170775607343847357.post-7499206923972480392009-07-20T07:18:00.000-07:002009-07-20T07:47:34.578-07:00The W5JH Baby Black Widow keyer paddle<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6qbKh5wsfgEkdXDOZWthDbCMpf6v_0vm897SK_1XsqugfPYJFsSXOnWxc6NYcMccx8RJZg_h1t8dan6pbLg3MjdLJgiynMvi0Bn0C_15CFcA6zhAPDvMAu-fFpWF9nG1MtsYPOqD4y5U/s1600-h/KX-1+PADDLE+-+G.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6qbKh5wsfgEkdXDOZWthDbCMpf6v_0vm897SK_1XsqugfPYJFsSXOnWxc6NYcMccx8RJZg_h1t8dan6pbLg3MjdLJgiynMvi0Bn0C_15CFcA6zhAPDvMAu-fFpWF9nG1MtsYPOqD4y5U/s400/KX-1+PADDLE+-+G.JPG" alt="" id="BLOGGER_PHOTO_ID_5360549348507750322" border="0" /></a><br />The <span style="font-weight: bold;">August 2009 edition</span> of <span style="font-weight: bold; font-style: italic;">WorldRadio Online</span> magazine's <span style="font-weight: bold;">Trail-Friendly Radio</span> column, by <span style="font-weight: bold;">Richard Fisher, KI6SN,</span> features Jerry Haigwood, W5JH's, new Baby Black Widow keyer paddle that is perfect for trail operations - especially when using the Elecraft KX1 or Hendricks QRP PFR3 transceivers.<br /><br />Below is a photograph showing how the Baby Black Widow<span style="font-weight: bold;"> can easily be adapted</span> for use with <span style="font-weight: bold;">any transceiver</span> by fashioning an eighth-inch stereo headphone jack (available from Radio Shack) as an attachment to your key line.<br /><br />Also, there's a photograph showing how a <span style="font-weight: bold;">piece of thread</span> can be used as a <span style="font-weight: bold;">tether</span> when you're installing the paddle's <span style="font-weight: bold;">tension spring</span> during construction. Simply reel off a <span style="font-weight: bold;">10 to 12-inch piece of sewing thread</span> and <span style="font-weight: bold;">loop it through</span> the <span style="font-weight: bold;">center of the spring.</span> If the spring "decides" to fly off into the wild blue yonder during construction, <span style="font-weight: bold;">it'll only go as far as the tether allows.</span> And, after you've successfully installed the spring, simply <span style="font-weight: bold;">cut the thread</span> or <span style="font-weight: bold;">pull it away</span> from the spring. <span style="font-weight: bold; font-style: italic;">Voila!</span><br /><br /><a href="http://www.w5jh.net/Paddles.htm">Click here to visit the W5JH Website.</a><br /><br /><span style="font-style: italic;">(For enlarged views, click on each image.)</span><br /><span style="font-style: italic;"><br /></span><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9if6zFHD4sGWH0dIqh9oFcOryyFxSvCH1cRKbvTpSn-u6srzB8ciOc8hbX3F8ea9vwlR2aOv5zChuY_MoTTEVscScmphJg3Ei7WJE_8tLmpBNIEm1lzY8or8Pp7gUYKvq_S37OIoM0BI/s1600-h/Alternate+Jack.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 213px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9if6zFHD4sGWH0dIqh9oFcOryyFxSvCH1cRKbvTpSn-u6srzB8ciOc8hbX3F8ea9vwlR2aOv5zChuY_MoTTEVscScmphJg3Ei7WJE_8tLmpBNIEm1lzY8or8Pp7gUYKvq_S37OIoM0BI/s400/Alternate+Jack.JPG" alt="" id="BLOGGER_PHOTO_ID_5360548529660157090" border="0" /></a><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTxJvJ9E4KFWA4z-tAGXQvi9fhQhNLJujjdtHqo26Wk3nc9Ix6IxkBukZ1rovqCARFUshBtVNQOdqQmPpAMdwfk13M1oF6UEaxhSBN1ASNb4RPVr4dNCNCfyEP6NVq9QB-S8XJBX2OYIM/s1600-h/W5JH+-+Spring+%26+Thread.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 357px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTxJvJ9E4KFWA4z-tAGXQvi9fhQhNLJujjdtHqo26Wk3nc9Ix6IxkBukZ1rovqCARFUshBtVNQOdqQmPpAMdwfk13M1oF6UEaxhSBN1ASNb4RPVr4dNCNCfyEP6NVq9QB-S8XJBX2OYIM/s400/W5JH+-+Spring+%26+Thread.JPG" alt="" id="BLOGGER_PHOTO_ID_5360548853103728258" border="0" /></a>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-29227096175578255942009-06-21T07:19:00.001-07:002010-02-25T08:48:38.457-08:00Preventing a 'reversal of fortune' in the field<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiBFB4XObhRZifp6C8X8oUWWRmz-NECGkHRzP6oHeZywPGe2KEzYP_v1-dJcB-Yh9C5nTOzDlrxBT_DWszzm_EvQtOkaEwhux3jwa84CT3kKfVbvEy2NEWXsEzSMCaGFJ6ytYuWvhpg6rs/s1600-h/Reverse+Polarity+Protector+-+Field+Unit.JPG" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5349785628905192210" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiBFB4XObhRZifp6C8X8oUWWRmz-NECGkHRzP6oHeZywPGe2KEzYP_v1-dJcB-Yh9C5nTOzDlrxBT_DWszzm_EvQtOkaEwhux3jwa84CT3kKfVbvEy2NEWXsEzSMCaGFJ6ytYuWvhpg6rs/s400/Reverse+Polarity+Protector+-+Field+Unit.JPG" style="cursor: pointer; display: block; height: 254px; margin: 0px auto 10px; text-align: center; width: 400px;" /></a><br />
The <span style="font-weight: bold;">July 2009 edition</span> of <span style="font-style: italic; font-weight: bold;">WorldRadio Online</span> magazine's <span style="font-weight: bold;">Trail-Friendly Radio</span> column, by <span style="font-weight: bold;">Richard Fisher, KI6SN,</span> features details on a simple field-operation accessory that can spare the operator a ton of headaches caused by fried equipment, as well as a ton of embarrassment.<br />
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This <span style="font-weight: bold;">reverse polarity protector</span> can help you to avoid a reversal of fortune when out on the trail.<br />
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All it takes is inadvertently hooking up your battery cables backward: <span style="font-weight: bold;">POSITIVE</span> lead to the <span style="font-weight: bold;">NEGATIVE</span> battery terminal, and vice versa. The <span style="font-style: italic; font-weight: bold;">WRO</span> article has full construction details. Pictured here is the circuitry housed in a nice plastic box.<br />
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A <span style="font-weight: bold;">black power cable</span> with large <span style="font-weight: bold;">alligator-style clip leads</span> goes to the <span style="font-weight: bold;">battery.</span> An <span style="font-weight: bold;">RCA jack</span> with appropriate cable goes from the unit <span style="font-weight: bold;">to your transceiver.</span><br />
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With this accessory in line, if you mistakenly get battery polarity reversed, a protecting diode shorts the DC to ground and the fuse blows - saving your equipment.<br />
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<span style="font-weight: bold;">Two spare fuses</span> are wrapped in <span style="font-weight: bold;">white tissue</span> and <span style="font-weight: bold;">stored in the box,</span> ready to be called upon if any <span style="font-weight: bold;">knuckleheaded</span> battery connections are made.<br />
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Here's the circuit's schematic:<br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhm4H4SasgraH-8BiAfDy3dXil85reThIa-qRbSD6dh7e1_KnTvcY85H96uvLPFY1AX2zP4JgLqyovfDAQRn_YitRTXodbXCtWXfhAKiPKdMlQE5czeiQYvRpCfGrjpiyHKQFDOf0vsH3k/s1600-h/Reverse+Polarity+Protection.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="263" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhm4H4SasgraH-8BiAfDy3dXil85reThIa-qRbSD6dh7e1_KnTvcY85H96uvLPFY1AX2zP4JgLqyovfDAQRn_YitRTXodbXCtWXfhAKiPKdMlQE5czeiQYvRpCfGrjpiyHKQFDOf0vsH3k/s400/Reverse+Polarity+Protection.JPG" width="400" /></a></div><br />
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<a href="http://www.cq-amateur-radio.com/WorldRadio.html">Click here to see the latest edition of WorldRadio Online magazine.</a><br />
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<span style="font-style: italic;">(For an enlarged view, click on the image.)<br />
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</span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-69319721545948924692009-05-21T04:24:00.000-07:002009-05-21T07:07:30.012-07:00Plenty of audio for overcoming sounds in the field<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9TjoiKG4qNYyQL6Nnu8xoPmO51o7M73OsytTyJDl0dGKlRVssE6c60mj-muJFKh-fNgj_PcukyhoDOVnb1OpyE7T2HQphCL19Tm9T0JFsnr0doCGBqKrcf43tbLCSnCvP0DcdsH1E1_I/s1600-h/Islander+Amp+-+B.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 266px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9TjoiKG4qNYyQL6Nnu8xoPmO51o7M73OsytTyJDl0dGKlRVssE6c60mj-muJFKh-fNgj_PcukyhoDOVnb1OpyE7T2HQphCL19Tm9T0JFsnr0doCGBqKrcf43tbLCSnCvP0DcdsH1E1_I/s400/Islander+Amp+-+B.JPG" alt="" id="BLOGGER_PHOTO_ID_5338274306385928322" border="0" /></a><br />The June edition of <span style="font-weight: bold; font-style: italic;">WorldRadio Online</span> magazine's Trail-Friendly Radio column by<span style="font-weight: bold;"> Richard Fisher, KI6SN,</span> focuses on the <span style="font-weight: bold;">Four State QRP Group's Enhanced Manhattan Islander Audio Amplifier</span> - an innovative design both electronically and physically.<br /><br /><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4Lc3fSOR0uLTRw3ZRt7EJWJRCw-SvakFxeFti5rYqJebAAw-HfKwxjVeoMHWEePrBcHv90vPaESYsS64_HhK7ExMO4qa31UUr6xt0DejkWkqRo08wQWbOOgev4CIKjIRkaDCHXpiidH4/s1600-h/Islander+Kit+Package.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 250px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4Lc3fSOR0uLTRw3ZRt7EJWJRCw-SvakFxeFti5rYqJebAAw-HfKwxjVeoMHWEePrBcHv90vPaESYsS64_HhK7ExMO4qa31UUr6xt0DejkWkqRo08wQWbOOgev4CIKjIRkaDCHXpiidH4/s400/Islander+Kit+Package.JPG" alt="" id="BLOGGER_PHOTO_ID_5338274609815255106" border="0" /></a><br />The kit comes nicely packaged and construction is an interesting - and pleasurable - exercise in both electronics and the arts.<br /><br />With the low audio levels of many of today's trail-friendly transceivers, this audio amplifier is a perfect solution for overcoming some of Mother Nature's ambient sounds.<br /><br />Kit developers <span style="font-weight: bold;">Jim Kortge, K8IQY; Larry Przyborowski, K3PEG; Terry Fletcher, WA0ITP;</span> and <span style="font-weight: bold;">Ron Hege, K3PF,</span> have teamed to manage the Four State QRP Group production run.<br /><br /><a href="http://www.wa0itp.com/emislander.html">Click here to see details</a> on Four State QRP's Enhanced Manhattan Islander Audio Amplifier kit.<br /><br /><a href="http://www.qrpme.com/K7QO%20Manhattan%20Techniques%20Paper.pdf">Click here for a tutorial</a> on Manhattan-style building techniques written by <span style="font-weight: bold;">Chuck Adams, K7QO.</span><br /><br /><span style="font-style: italic;">(For an enlarged view, click on the images.)</span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-33166694823779747792009-04-20T16:29:00.000-07:002009-04-21T06:26:12.481-07:00More feedback on the innovative 'Joule Thief'<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgM8Fz7C32CzdTpuZHErTo2K3iMeQ_4mQddSZ8hO4CXgBePd2RusXm9Bose2TxNx_ZdpYT3wsfRD8_VIy-6XQqhHyFx_3ogyrAIpYOSw6Btp68J8WgPb0LwTFvF-khM4EfIk6xh1l6NTAk/s1600-h/W7RDP+-+C.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgM8Fz7C32CzdTpuZHErTo2K3iMeQ_4mQddSZ8hO4CXgBePd2RusXm9Bose2TxNx_ZdpYT3wsfRD8_VIy-6XQqhHyFx_3ogyrAIpYOSw6Btp68J8WgPb0LwTFvF-khM4EfIk6xh1l6NTAk/s400/W7RDP+-+C.JPG" alt="" id="BLOGGER_PHOTO_ID_5326922635267891218" border="0" /></a><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDMS3sxg9OixRPIOQ4c9FPdTlhkEmsHRFu-Tmzft8LCv7yJKaA6lsMnyYautXq0j3H9XZXZmhx9m9G_5BpKEBtee3Z2yfNSSBLeGL_-tdmmFoB-4mClSi0JkRvDkFtgrMaGCy7Hr-Zd1Q/s1600-h/W7RDP+-+B.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDMS3sxg9OixRPIOQ4c9FPdTlhkEmsHRFu-Tmzft8LCv7yJKaA6lsMnyYautXq0j3H9XZXZmhx9m9G_5BpKEBtee3Z2yfNSSBLeGL_-tdmmFoB-4mClSi0JkRvDkFtgrMaGCy7Hr-Zd1Q/s400/W7RDP+-+B.JPG" alt="" id="BLOGGER_PHOTO_ID_5326922531446660770" border="0" /></a><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiL3XOJbm0G5NqJWus301ccjYDtwWeXLAn3cnoxi_dQsMdwvVs9LA-thCln6DrX-UMU8XxrRsZDuUlOeZrCMNQrSalXuQWY4ChhiBHoCJ_fqvlXmQjYi-89HNeu3mGU9RW_xPvHEgrkDuM/s1600-h/W7RDP+-+A.jpg"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiL3XOJbm0G5NqJWus301ccjYDtwWeXLAn3cnoxi_dQsMdwvVs9LA-thCln6DrX-UMU8XxrRsZDuUlOeZrCMNQrSalXuQWY4ChhiBHoCJ_fqvlXmQjYi-89HNeu3mGU9RW_xPvHEgrkDuM/s400/W7RDP+-+A.jpg" alt="" id="BLOGGER_PHOTO_ID_5326922408232356130" border="0" /></a><br /><br /><br />Above, three views of the craftsmanship of <span style="font-weight: bold;">W7RDP </span>in his version of the <span style="font-weight: bold;">"Joule Thief"</span> mini-LED trail-friendly light featured in the February edition of the <span style="font-weight: bold;">Trail-Friendly Radio </span>column in <span style="font-weight: bold; font-style: italic;">WorldRadio Online</span> magazine.<br /><br /><a href="http://www.bigclive.com/mkendo.htm">Click here for the link to the 'Joule Thief'</a> by <span style="font-weight: bold;">Big Clive,</span> which inspired the YouTube video by Bre Pettis and Wendell H. Oskay.<br /><br />Click here for links to <span style="font-weight: bold;">how the "Joule Thief" does its magic.</span><br /><a href="http://www.ledsales.com.au/kits/joule_thief.pdf">Explanation 1</a><br /><a href="http://www.instructables.com/id/My-Joule-thief/">Explanation 2</a><br /><br /><a href="http://www.edn.com/contents/images/6413790.pdf">Click here for the EDN Magazine article</a> that inspired <span style="font-weight: bold;">Doug Phillips, W7RDP's</span> version of the "Joule Thief."<br /><a href="http://www.danssmallpartsandkits.net/"><br />Click here for a link to Dan's Small Parts and Kits,</a> one source for the <span style="font-weight: bold;">FT50-61 toroid</span> used in the "Joule Thief."<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgsgu168eCPdFt0ab-X1Rw9IBmM8W-nK5jq4u16VwS_Y8ciM-LcnZseIjOJHb45jNBpcnr3WnNw0DZYnUoAexs_glqY4lS58O-RQaOChgxBORQC474cOzkmE3Sz86Jp_y1mg4pd7-fU4CE/s1600-h/AD7GR+-+B.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgsgu168eCPdFt0ab-X1Rw9IBmM8W-nK5jq4u16VwS_Y8ciM-LcnZseIjOJHb45jNBpcnr3WnNw0DZYnUoAexs_glqY4lS58O-RQaOChgxBORQC474cOzkmE3Sz86Jp_y1mg4pd7-fU4CE/s400/AD7GR+-+B.JPG" alt="" id="BLOGGER_PHOTO_ID_5327135165066897906" border="0" /></a><br />An inside look at <span style="font-weight: bold;">AD7GR's</span> version of the "Joule Thief."<br /><br /><span style="font-style: italic;">(For an enlarged view, click on the images.)<br /><br /></span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-40614566583610338792009-03-20T11:34:00.000-07:002009-03-20T12:14:20.835-07:00Open mind, open spaces and the W3EDP<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgx2hV5m2bZWQ7NSfRU5CY17eYlie1Zys278e9VvGUjarUqOqJEXfNmwlvqWOshRJga_04iUDt6ZGH37Hbocwd5HZ_ZgY1NgAO9bP1MshGuSiaARj970TQmlCOlO51XFZcbk1kiY8nDgTI/s1600-h/W3EDP+Spreaders+-+A.JPG"><img id="BLOGGER_PHOTO_ID_5315341106026989234" style="margin: 0px auto 10px; display: block; width: 400px; height: 116px; text-align: center;" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgx2hV5m2bZWQ7NSfRU5CY17eYlie1Zys278e9VvGUjarUqOqJEXfNmwlvqWOshRJga_04iUDt6ZGH37Hbocwd5HZ_ZgY1NgAO9bP1MshGuSiaARj970TQmlCOlO51XFZcbk1kiY8nDgTI/s400/W3EDP+Spreaders+-+A.JPG" border="0" /></a><br />As featured in <strong style="font-weight: normal;">the <span style="font-weight: bold;">April 2009 Trail-Friendly Radio</span> column in <em style="font-weight: bold;">WorldRadio Online</em></strong> magazine by <strong style="font-weight: bold;">Richard Fisher, KI6SN,</strong> the <strong style="font-weight: bold;">W3EDP end-fed wire antenna</strong> is a great, versatile performer when you're out and about in the field. Spreaders, made of specially cut PVC pipe material, provide lightweight spacing for the antenna and accompanying matching section.<br /><br /><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpExHpIb81lPmQQcuwok-zYyvceyqTp87cMOltpH_l4w3TSbA68itwbevd5IJIXEoyolMkSMIOIAn1oIJgkIHkYuB_OXMiuv0KKkPupeIo3sRYN66ObbgPakJ0jnq3KkRrsWJrv0yre48/s1600-h/W3EDP+Hardware.jpg"><img id="BLOGGER_PHOTO_ID_5315340816148095362" style="margin: 0px auto 10px; display: block; width: 400px; height: 269px; text-align: center;" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpExHpIb81lPmQQcuwok-zYyvceyqTp87cMOltpH_l4w3TSbA68itwbevd5IJIXEoyolMkSMIOIAn1oIJgkIHkYuB_OXMiuv0KKkPupeIo3sRYN66ObbgPakJ0jnq3KkRrsWJrv0yre48/s400/W3EDP+Hardware.jpg" border="0" /></a><br />The <strong>84-foot antenna, 17-foot matching section,</strong> spreaders and an antenna tuning unit don't add much weight or take up much space in your radio tote bag.<br /><div><br />A test set-up in Southern California a few years ago <span style="font-weight: bold; font-style: italic;">(pictured below)</span> put the W3EDP through its paces on 40- and 20-meter CW during an on-air competition. The antenna is <strong>easy to put up and take down, </strong>and under field conditions can be used with <strong>only one support</strong> - a great advantage when you're operating above the tree line.</div><div><br />Here are <strong>links to sites</strong> with information related to the W3EDP antenna:</div><div><br /><a href="http://www.adventure-radio.org/ars/pages/back_issues/1998_text/0698_text/ffd.html">THE FFD ANTENNA: A Field-Friendly Doublet, With Notes on Related Designs,</a> by Charles Lofgren, W6JJZ</div><div><br /><a href="http://kb6nu.com/the-w3edp-antenna/">KB6NU's HAM RADIO BLOG: The W3EDP Antenna,</a> by Dan Romanchik, KB6NU</div><div><br /><br /><a href="http://www.radiohc.org/Distributions/Dxers/scripts/01-0508.html">DXERS UNLIMITED: Item 3 - The W3EDP Antenna,</a> by Arnie Coro, CO2KK</div><div><br /><a href="http://home.frognet.net/%7Emcfadden/wd8rif/field-antennas.htm#w3edp">Field-Deployable Antennas,</a> by William Eric McFadden, WD8RIF</div><div><em><br />For enlarged views, click on the images.<br /><br /></em><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGd29mVezfWdu6Y1MRhvUVzPtWB6aVXg_hqnHSNeApoS3pPObvh_70ivsR4riSZwVCGEVBdjIfdegfFZRXkdeDMH37LyAHSPRQWYYttpexF2t1rCZgoa_iak5kVfXPhKdr2H3_0WOYyww/s1600-h/W3EDP+Antenna.jpg"><img id="BLOGGER_PHOTO_ID_5315340704985544338" style="margin: 0px auto 10px; display: block; width: 400px; height: 301px; text-align: center;" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGd29mVezfWdu6Y1MRhvUVzPtWB6aVXg_hqnHSNeApoS3pPObvh_70ivsR4riSZwVCGEVBdjIfdegfFZRXkdeDMH37LyAHSPRQWYYttpexF2t1rCZgoa_iak5kVfXPhKdr2H3_0WOYyww/s400/W3EDP+Antenna.jpg" border="0" /></a><br /></div><div></div><div></div></div>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-32286592457743290572009-02-01T13:48:00.000-08:002009-03-17T16:14:03.120-07:00The Sudden Storm receiver goes to the field<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQMU0J-JKR7QL0Im6w518tFbLte8xljDTm_LrmNnbbdS8UAi8tnyKjTbBWuyOpeNalHjge7kVhdBsTsaThZ041KGTq3QNrjZwj9DokWsgVl_0HBtIJzxVdIXQnXNzMJ7tCbcI8SKMHFKU/s1600-h/SuddenDone_fs.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 267px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQMU0J-JKR7QL0Im6w518tFbLte8xljDTm_LrmNnbbdS8UAi8tnyKjTbBWuyOpeNalHjge7kVhdBsTsaThZ041KGTq3QNrjZwj9DokWsgVl_0HBtIJzxVdIXQnXNzMJ7tCbcI8SKMHFKU/s400/SuddenDone_fs.JPG" alt="" id="BLOGGER_PHOTO_ID_5302715906313870690" border="0" /></a><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhb6AxRaFAFNN_iHfBxmxddGAOT8S6rgjlrkF6-8JcyEO1tnSJVS5f_wRlju01tqU7KfOzCNj8bIhHaqwPKItuJsguovOZ49wwjEegFbyFPmdDoY36Iw0j6tW42C7fjLWrGvDbinbTRJvk/s1600-h/TFR+40-40.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 283px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhb6AxRaFAFNN_iHfBxmxddGAOT8S6rgjlrkF6-8JcyEO1tnSJVS5f_wRlju01tqU7KfOzCNj8bIhHaqwPKItuJsguovOZ49wwjEegFbyFPmdDoY36Iw0j6tW42C7fjLWrGvDbinbTRJvk/s400/TFR+40-40.JPG" alt="" id="BLOGGER_PHOTO_ID_5297950800174460898" border="0" /></a><span style="font-weight: bold;">N6GA's TFR transceiver in the 1990s was the inspiration for many trail-friendly radios of today - including the renowned Elecraft KX-1.</span><br /><br /><br />As featured in <span style="font-weight: bold;">KI6SN's Trail-Friendly Radio</span> column in the <span style="font-weight: bold;">March 2009</span> edition of <span style="font-weight: bold;">WorldRadio Online</span> magazine, the <span style="font-weight: bold;">QRPme Sudden Storm Receiver</span> kit, designed to fit on top of an empty tuna-fish can with <span style="font-weight: bold;">components exposed,</span> is hardly a piece of gear that could withstand the rigors of the trail. But with <span style="font-weight: bold;">a few modifications,</span> the homebrewer can easily package this direct-conversion receiver into a unit that is great for listening in the outdoors.<br /><br />Click on the links here to find several<span style="font-weight: bold;"> Internet references</span> cited in the March column.<br /><br /><a href="http://arsqrp.pbwiki.com/An+inspiration:+TFR+40-40,+by+Cam+Harford,+N6GA">Cam Hartford, N6GA's, winning entry in the Adventure Radio Society's Trail-Friendly Radio competition (pictured above). </a><span style="font-style: italic;">For an enlarged view, click on the image.</span><br /><a href="http://www.elecraft.com/KX1/N6KR_KX1_History.html"><br />"Anywhere, Anytime HF," the story of the Elecraft KX-1 transceiver, by Wayne Burdick, N6KR</a><br /><br /><a href="http://www.elecraft.com/KX1/KX1.htm">The KX-1 from Elecraft Radio</a><br /><a href="http://www.qrpkits.com/"><br />Hendricks QRP Kits</a><br /><a href="http://www.qrpme.com/"><br />The Sudden Storm Receiver kit from QRPme</a> <span style="font-style: italic;">For an enlarged view, click on the images.</span><br /><br /><br /><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2boBXjugo4EVM65Hm1U-9fNxyJY0IKC62WMWh7XJtserEyQCoj50o4VyHtsI4igLUW8Cs6pmA6whAK2evdkxq-kpFrgtIQNEvdkTlAhdrXTCnd8GMyRy0-E-yK-G7AqsiBOVSm3ukT4U/s1600-h/Sudden+Storm+Package.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2boBXjugo4EVM65Hm1U-9fNxyJY0IKC62WMWh7XJtserEyQCoj50o4VyHtsI4igLUW8Cs6pmA6whAK2evdkxq-kpFrgtIQNEvdkTlAhdrXTCnd8GMyRy0-E-yK-G7AqsiBOVSm3ukT4U/s400/Sudden+Storm+Package.JPG" alt="" id="BLOGGER_PHOTO_ID_5297951314824074434" border="0" /></a>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com0tag:blogger.com,1999:blog-3170775607343847357.post-61951689330586023102008-12-06T14:21:00.001-08:002008-12-13T18:23:27.796-08:00The KI6SN Trail-Friendly Joule Thief<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhHM2ZuwFKm_Qsyj_unvFtteZUZlE6gise8lVgUIiszS3I0xdEVnE9Fv9DhfYFvJ1s6eQ3WpSsbQ2se_VnBAWXOLWnmBZkycQc9jL971i4ZdnN1IL-vvVUXyR42YHfo_SEiWl2MIatFMKE/s1600-h/Joule+Thief.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 335px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhHM2ZuwFKm_Qsyj_unvFtteZUZlE6gise8lVgUIiszS3I0xdEVnE9Fv9DhfYFvJ1s6eQ3WpSsbQ2se_VnBAWXOLWnmBZkycQc9jL971i4ZdnN1IL-vvVUXyR42YHfo_SEiWl2MIatFMKE/s400/Joule+Thief.JPG" alt="" id="BLOGGER_PHOTO_ID_5276807153600594994" border="0" /></a><br />As featured in <span style="font-weight: bold;">Trail-Friendly Radio</span> in the <span style="font-weight: bold;">February 2009</span> edition of <span style="font-weight: bold;"><span style="font-style: italic;">WorldRadio</span> on-line magazine,</span> the <span style="font-weight: bold;">Joule Thief</span> is a handy LED-based device that can be used to illuminate your field operating position while getting the most out of AA and AAA batteries that have been <span style="font-weight: bold;">pronounced "dead"</span> by other electronic devices - such as digital cameras.<br /><span style="font-style: italic;"></span><br />A <span style="font-weight: bold;">hay-wired version</span> of the Thief shows the <span style="font-weight: bold;">simplicity of construction</span> and the <span style="font-weight: bold;">handful of parts</span> needed to put it together.<br /><br /><span style="font-style: italic;">(For a larger view, click on the photograph.)</span><br /><br />The drawing below shows the <span style="font-weight: bold;">Manhattan-style layout</span> used to build the <span style="font-weight: bold;">KI6SN Trail-Friendly Joule Thief.<br /></span><br /><span style="font-style: italic;">(For a larger view, click on the drawing.)<br /><br /></span><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNZYgAI4tsXJvHKtNLE20wlCehYweq-aNCx5Z8WstiYd2NeoCC3UM-X2uo6FoN10ZknRerRfS-_ouN63s5Iyx6paMKHbaHvyMiglvThAVtEWHxWCvCfnrSGOB-oQb2M3grOClDjTKZwuE/s1600-h/Joule+Thief+Illustration.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 252px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNZYgAI4tsXJvHKtNLE20wlCehYweq-aNCx5Z8WstiYd2NeoCC3UM-X2uo6FoN10ZknRerRfS-_ouN63s5Iyx6paMKHbaHvyMiglvThAVtEWHxWCvCfnrSGOB-oQb2M3grOClDjTKZwuE/s400/Joule+Thief+Illustration.JPG" alt="" id="BLOGGER_PHOTO_ID_5276896087569521570" border="0" /></a><a href="http://www.youtube.com/watch?v=gTAqGKt64WM">Click here to see</a> a <span style="font-weight: bold;">Bre Pettis You Tube </span><span style="font-weight: bold;">video </span><span>showing how the</span><span style="font-weight: bold;"> circuit is assembled, </span>including detailed instructions on <span style="font-weight: bold;">how to wind the toroidal inductor.</span><br /><br /><span style="font-style: italic;"><br /><br /></span>Richard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.com3