CW sounds raspy here?
Yes, CW was raspy because of the 120 Hz hum that was on it. But, it was not drifting in freq. I was, however, able to reproduce the drift...in the G31DDC.
If you play weaksigs recording go to the last 30 seconds of audio. Note how the drift is present until the last 10 seconds of audio (5:28 in the recording), then it becomes solid and drift free. One of the possible keys is his response "Listening on the G31 AM", the other is the drift is always down.
Most of these time slots have been CW, not MCW, and so AM should not result in a tone. However, if you listen in AMS and click slightly off freq you do get a tone...but AMS is AM Sync and the radio tries to zero the tone. And so the drift in tone should be down, as the AMS sees the CW as the carrier, and tries to zero the carrier.
weaksigs, the next time you see this signal try only USB or CW, no AM. I bet the drift is no longer there. If you do want to try AM try AM, not AMS.