[amsat-bb] Looking for 8.8125 MHz xtal
ko6th.greg at gmail.com
Thu Jun 1 22:31:49 UTC 2017
Looking back in my notes, the diode-based generator idea was from K5OE,
where he put a 1N4005 diode in parallel with five 47K 1/2 watt resistors
(so, all 6 in parallel), driven at 29.999 mhz directly from his HF rig.
I did the same from my 2M HT, and it seemed to work. Also a lot more
portable. No clue what sort of return loss it presented, but the HT
survived just fine.
I also tried using a 50mhz crystal oscillator module connected directly
to a small 13cm ground plane antenna. That worked too, though the
signal was much quieter (48th harmonic).
Zach Metzinger wrote:
> That's a great idea on the 2m rig as an exciter for a diode comb
> generator. I'll have to try that out tonight on my unmodified unit! I
> assume that you attached the diode on the other side of a 20 dB pad
> to give some sort of reasonable return loss for the rig?
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