Today I received a permit for experimental transmissions on the 500 kHz band, 501.000 - 504.000 kHz.
Now I will need to build a transmitter, I will most probably go the way Joachim proposed, using a 27 MHz crystal on the fundamental frequency (9 MHz), then dividing by 9 with a 4017, then by 2 with a flip-flop, followed by a "buffer amplifier" , and later an IRF510 as power amplifier.
The hard part will be the antenna, it needs to be compact, so a "magnetic loop" is probably the only way to go here.
Chris KN4GAH's 100th! SolderSmoke Direct Conversion Receiver
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*This was the 100th SolderSmoke receiver! It was really cool to see
Chris KN4GAH's receiver inhaling CW (sbove) and SSB (below). I
especially like ...
1 day ago
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