26 Aug 2020
WISPY 10m WSPR RX
In 2012 I designed a very simple RX for 10m WSPR as shown in the photo and circuit. It used low cost 14.060MHz crystals and a Polyakov mixer. It worked well. Even now there's WSPR on 10m, although FT8 is more popular.
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2 comments:
I just found that I have a couple of 14.04MHz crystals. It just might be possible to pull the Xtal sufficiently to achieve 28.074 reception with the Polyakov/WISPY concept. It might be necessary to use 2 crystals in a "super-vxo" configuration, but given that I have a few, that should not be a problem.
Voila! A 10m FT8 monitor receiver.
I would be very surprised if just a single crystal can't be pulled down to get on 28.074MHz for FT8 reception.
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