Re: Undulating transmit audio in HF programs #draws

Mitch Winkle

Over the air testing revealed that what I was seeing here is mirrored over 200 miles away, so it is not likely a local RFI issue on RX here.

Then, I hooked up an external high quality sound card via USB and an external radio interface which keys PTT by USB serial.  Clean audio out using FLDIGI.  Clean reception locally, and clean reception verified by the remote station.

Definitely an audio hardware issue or an audio config issue.

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