[Drake] AC Hum in TR-4C speaker`

[LEE BAHR]

Have you changed out the can electrolytic in the TR-4C transceiver?  It's 
there for a reason.

Lee, w0vt

>
>     Before I spend a bunch of time chasing my tail trying to solve an
> AC hum issue in my newly acquired TR-4C, I thought I would try the
> reflector.  I found a pretty nice AC-4 to go with the TR-4C on Ebay.  I
> also found an AC-3.  I just installed the AC-4R kit in the '4 which is
> really nice!  The problem is that there is a noticeable AC hum in the
> speaker all the time.  I hear it when I key the mic. or turn the RCVR
> gain down.  It's always there and fairly loud.  BOTH supplies exhibit
> the same problem even after installing the new AC-4R upgrade.  Now I am
> thinking maybe a tube with a filament to cathode short.   Anybody run
> into this before?
>
> Thanks and have a great 2011!
>
> 73
> Tony - W9JXN
>
>