Recent questions on this on GQRP list about the docs for the setup of a TCVR using a set of boards from Kanga a few years ago... basicalkly starts off with the ONER TX from George Burt GM3OXX
> SPRAT has them all...
>
> SPRAT 45 Pages 4 & 5 ONER TX
> SPRAT 53 Pages 4 & 5 ONER VFO
> SPRAT 54 Pages 16 & 17 ONER 'IMP' RX
> SPRAT 56 Pages 3 ONER changeover and wiring for the whole setup on page 4.
>
I only know as I put the components together to build, in an OXO tin and printed them off (GQRP CD has the SPRAT as PDF).
I had to sub in a few things though.
IRF510 for VN10KM (N channel mosfet)
2N3906 and 2N3904 were used where NPN and PNP appeared.
I used J310 instead of 2N3819 in the VFO and RL1 from the ONER changeover was DPDT relay PCB mount version from Jabdog.
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Operating location from a top in alps c2600m
Now this was a perfect SOTA location, I stayed on top overnight and used the flag pole to my right to support a 40m/20m dipole, you can see the fixture I connected to, the little ring clamp, as soon as the cable car stopped for the night out came the radio gear, it even snowed! If I had taken 2m yagi would have been amazing location as line of sight was > 80miles, the Eiger and Jungfau (Bernese Oberland group) are in the photo over my right shoulder. Temp dropped to below minus 15 but the morning operating the grey line was fun 100 or so QSO SSB qrp as HB9/M1KTA/P.
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