Although I also built a simple WSPR RX for 10m, I never got around to combining both the TX and RX into a single unit. Sadly, my stroke got in the way.
That's a very interesting circuit Roger. It might make a good 630m experimental project, maybe with a low power linear switching FET in the PA.....hhhmm.
No 14.060 crystals are commonly available and low cost! That is why this circuit was developed! This is probably the most common crystal on the planet. It is the 20m QRP frequency.
Sorry Steve, we were at cross-purposes. Although my 630m transverter (see my website) used a 3.2MHz crystal on TX, other frequencies could be used. In WISPY the PA output can be increased further by paralleling more PA devices. I used 4 at one point. Much lower cost than a 2N3866.
That's a very interesting circuit Roger. It might make a good 630m experimental project, maybe with a low power linear switching FET in the PA.....hhhmm.
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....or maybe not. The xtal would be a problem unless a divided down HF xtal is used? I don't think a standalone L-C oscillator would be stable enough.
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No 14.060 crystals are commonly available and low cost! That is why this circuit was developed! This is probably the most common crystal on the planet. It is the 20m QRP frequency.
DeleteNot 14.060 xtals .... something that could be divided down for a 630m version of your circuit.
ReplyDeleteSorry Steve, we were at cross-purposes. Although my 630m transverter (see my website) used a 3.2MHz crystal on TX, other frequencies could be used. In WISPY the PA output can be increased further by paralleling more PA devices. I used 4 at one point. Much lower cost than a 2N3866.
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