[Collins] 51S-1 Audio

[C E]

I'm pretty sure the esteemed Dr. will chime in on this
one but for now, I'd check the tubes. I had a 75S1
that had a problem like what you mentioned. Turned out
the one of the elements shorted to the filament (or
something like that). A sharp rap to the tube (of
course, not breaking it) stopped the problem cold. 

Other than that, if a tube swap doesn't do it, start
your troubleshooting procedures and look for the usual
suspects. 

Cal

--- "Peter E. McGovern" <ke4ppi at bellsouth.net> wrote:

> After having carefully warmed this old rig up (very
> slowly) on the veractor
> everything seems to be working perfectly. 
> Nevertheless, USB/LSB/CW sounds a
> bit garbled (maybe 60 cycle).  Voice sounds gravely
> and CW kind of buzzy.
> Before I start poking around, anyone have any
> idea(s) about where to start?
> 
> Pete
> KE4PPI
> 
> 
>
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