GA LF, I have a recurring problem with my home made LF WSPR TX :- As the PC's audio signal shuts down (after the nominal 2 minute transmission time) it picks up RF - this is fed back to the TX in
Hi Chris, Try a 1:1 RF ferrite decoupling trasformer, right behind the PA. Maybe also on the PA input. Try to use a battery for the PA, just for one WSPR sequence, to see if that solves the problem.
Hello Chris, Is anything else picking up RF? I had a sort of similar issue ages ago whereby using an autotransformer to impedance match to the loading coil RF seemed to abound everywhere it shouldn't
Hi Stefan, Many thanks for the prompt reply. I shall do as you suggest and hopefully cure the problem. 73 Chris On Sat, Jun 17, 2017 at 12:57 PM, DK7FC <[email protected]> wrote: Hi Chris, Try a
Hello Chris, Is anything else picking up RF? I had a sort of similar issue ages ago whereby using an autotransformer to impedance match to the loading coil RF seemed to abound everywhere it shouldn't
Thanks for the advice Chris. The RF in the shack is quite strong despite the TX only running 100W I've been fiddling and it looks as if it's an earth loop problem. I'll re-jig the cabling and earthin
