So it¡¯s looks like I got to the bottom of the problem where RF seemed to be getting into the delay of the CW and causing chattering in my auto tuner plus a hiss in the speakers. ?
It was due to the IF out pan-adaptor wire I installed and when the wire In rear was plugged into SDR it seemed to allow RF to get in. ?I also changed the resistor I was using as a buffer and replaced it wit a 22pf. It seems not to effect the circuit better then the resistor. ?
Anyway I added 3 ferrites to the coax piece from my tap to the BNC connector on then back of radio. It¡¯s doing a good job keeping the RF out, that¡¯s what it needed. I also went through an exercise of replacing all wires with shielded cables, which all helps to keep the RF gremlins at bay. ?
I ordered some small ferrite rings to wrap any misc single wires but my problem seems to be resolved. ?
Joe
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On Apr 12, 2019, at 8:35 AM, Jack Brabham - KZ5A <
kz5a@...> wrote:
There is a uBitx "keying" board by W0EB on QRP Guys, might be relevant to your issue.
73 Jack KZ5A
