Re: Spurious RF at beginning of CW transmission in the uBitx



I tried my earlier suggestion about putting a diode in series with R66 and it causes another problem. The energy stored in C64 keeps the mic amplifier running for about a half a second after releasing PTT, feeding mic audio into the audio output stages resulting in feedback and a nice squeal in the audio output! Maybe all (or half) of N3GO's solution would be better, at least for clamping the TX line. 

Bob N1KW

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