KI6SN's Trail-Friendly Radio column in the May 2010 edition of WorldRadio Online magazine features an easy-to-build audio amplifier that's great for adding headphone punch in the field. Utilizing a 14-pin LM380 / NTE740A chip, the circuit requires only a small handful of parts.
Here are some photos of the KI6SN version of the amplifier:
For an enlarged view, click on the images.
Links to parts sources for the amplifier include:
Dan's Small Parts and Kits
Digi-Key Corp.
Mouser Electronics
