Survey
Posted: 07 May 2023, 13:34
Not a good knowledge of uSDX of the OM there which does the "Survey",
he mentioned uSDX is not DL2MAN, but this is totally wrong!
The story goes like this:
Guido PE1NNZ started with circuit changes on QCX pcb of Hans G0UPL and wrote the genius software for ssb on the Atmega328 first as QCX-SSB.
Manuel did the new circuit and pcbs for 5 and 8 band uSDX (called also Sandwich by him) transceiver.
This was unouthorized copied and partly changed, with no real rf skills knowledge, by some chinese companies and still uses Guidos magic software. For example some copied uSDXes use an IRF510 worst to be used for class-E PAs.
And therefore any chinese uSDX is still a 95% or more percent circuit from Manuel DL2MAN and Guidos PE1NNZs software.
73 de Chris
P.S.: From my point of view such strange "Surveys" make not really sense for anything