[Collins] Dial slippage, audio distortion, and humming iron in KWM-2A

[Chris Kepus]

I just woke up my round emblem KWM-2A after it had been sleeping for nearly
five years.  This unit was worked over and updated by Dennis Brothers about
5 years ago but it was not put back into service. I bought it nearly two
years ago and, I am sad to say, it sat unused. This condition is about to
change as I am finally getting my shack in order. So tonight, I woke it up.
The good news is that it plays.  The bad news is:
1. The PTO dial drive is slipping in several places during rotations.  The
amount of slippage seems to be decreasing slightly with use but it still is
slipping.
2. The power transformer (choke?) seems to be humming.  The power supply
unit was professionally solid stated. The humming (vibration) is not
terribly noisy.
3. The audio sounds distorted to me.  It is not as clean sounding as on my
75S3 and no way as clean as on my TS-850S.  (Gotta fix that!!)

None of these is a show stopper. But they are annoying and I would
appreciate any and all suggestions that would allow me to correct these
problems, especially the dial slippage.

Thanks es 73,
Chris
W7JPG