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In Reply to: RE: Speaking of minimalism and audio... posted by SamA on November 06, 2015 at 10:12:11
My very first minimalist AM radio consisted of a 1N34 germanium diode, wire antenna, ground rod, and high impedance earphone. The only station it picked up was KFI (I lived in S.CA at the time).I later added a 2N107 'hobbyist' germanium transistor to make it louder and drive more difficult headphones.
Conceptually very similar with what is shown here but mine was built on
a small flat piece of wood with nails to support the few components and connections
Edits: 11/06/15Follow Ups:
I built a few of those germanium diode radios, too, using the cardboard tube from a roll of toilet paper to wind a coil of bell wire. From there it went to ham radio and more than a few homebrew QRP rigs for 80 and 40 meters. Then speakers and a phono pre-amp. It all has helped me to stay out of trouble, I think.
Interesting. I got my ham radio license a few years later and played around with CW transmitters on 40m and 15m. The only 'higher-end' receiver I built was a regenerative receiver that drifted and squealed if not adjusted just so. ;-)You mentioned powering your TDA7297 amp with an Astron power supply. That brand has been around for at least several decades. I have an old 12v 20A unit in storage down in the basement.
Edits: 11/06/15 11/06/15
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