I have the same issue with my RV-7 VFO. It is also tougher to turn the tuning knob. I've been told that it needed to be adjusted/loosened from a small set-screw that's accessed from the back of the VFO case.
Best Regards, Jim N9WW James E. Chaggaris President PowerOne Corp. 1020 Cedar Ave. Suite 110 St. Charles, IL 60174 Phn:(630) 443-6500 Fax:(630) 443-6505 Web: www.pwrone.com _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Laird Tom N Sent: Tuesday, December 12, 2006 7:27 AM To: Frank Krozel; drakelist@www.zerobeat.net Subject: [drakelist] RE: audio waveform has warble/hum on it! Guess what; I just pick up a TR-7 last week and I heard that voice warble on it too! Ever so slight, but I heard it. I checked into the Drake technical net over the weekend and no one on the net heard of that problem. The more I listen to the TR-7, the less noticable the warble, maybe it's dirty switch contacts and just the fact that I'm exercising them helps? Tom Laird W9QI Moline, IL. _____ On Behalf Of [EMAIL PROTECTED] OK, my TR-7 is getting back in line to what it left Ohio many years ago. I have been listening pretty critically on the receive and it seemed on SSB like there was a slight warble on the audio. When going to CW it was harder to hear but still there. (I listen to 35+WPM so maybe I couldn't hear it.) Went to the Calibrator and it seems like the 25kHz calibrator signal is "jumping" up and down (in voltage) slightly, maybe +/- 3% or so on the scope. Audio-wise it is hard to hear but.. it is there - warbling ever so slightly. There is also some sort of "other signal" in the background. The other signal is much lower in frequency, maybe 60Hz? but the same amplitude! The scope seemed like it had problems syncing... Any thoughts on this? Frank KG9H
