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Could you do a voltage test around the audio amp and report ? Volume =
At 14/06/2018, you wrote:
I have completed the uBitx and
calibrated both frequency and BFO. The sensitivity appears OK. However
audio has a strange crispy / semi-distorted sound to it.
I read the post from W3JDR
about biasing Q70 more strongly, however that only reduced the
gain somewhat but didnt seem to help the crispy / semi distorted sound.
I have tried several headsets and a speaker. Same issue.
Anyone have any hints to what may be done to achieve better audio and get
rid of that distortion effect?