[Collins] 75S3 PROBLEM

[Ed - K9EW]

Problem solved.

The culprit was a bad 6AU6 in the VFO.  I want to put the tube on an
analyzer to see what's shorted to what, but the solution turned out to be
as simple as installing a new tube.  Didn't have to touch C59.

Thanks to those who responded.  Your combined replies guided me to the
solution.

73,
ed - k9ew

On Wed, Feb 3, 2016 at 3:06 PM, Ed - K9EW <k9ew57 at gmail.com> wrote:

> I have a 75S3 with a raspy-sounding audio tone when receiving CW.  It
> looks like it must be from the 4.4Vpp of ripple on the B+ line, so that
> means replacing the triple-electrolytic C59.  (I've already replaced the
> other electrolytics in the hope that one of them may be the culprit, but
> the raspy CW note persists.)  It looks like a tedious job to replace it, so
> I'm wondering if someone knows of an easier way to do this than removing
> several parts just to get to the terminals of C59.
>
> Do you replace C59 with three discrete electrolytics?  Where do you put
> them / how do you mount them?
>
> Or can you rebuild C59?
>
> Or, is there a direct replacement for C59?
>
> Thanks in advance for any suggestions.
>
> 73,
> ed - k9ew
>