[R-390] Misbehaving Audio Pot

[jkharvie]

Sent from AOL on Android 
 
  On Wed, Sep 25, 2024 at 13:05, Roy Morgan<k1lky68 at gmail.com> wrote:   Get Caig FaderLube. Make tiny hole in the pot. Squirt and rotate control. If that does not work, find a different pot or take that one apart. 

Is that pot linear or audio taper? Allen Bradley Type J pots cost over $50 each new. (Do they still make them?) One of those will last the rest of your life. 
Roy Morgan
K1LKY Western Mass
K1LKY68 at gmail.com

> On Sep 25, 2024, at 11:10 AM, Barry Scott <72volkswagon at gmail.com> wrote:
> 
> When I turn the LOCAL GAIN in my R-390/URR all the way CCW, something is
> causing the audio to suddenly increase significantly.  It's just at the
> very CCW position and I suspect dirt/trash/whatever is the cause and a good
> cleaning would probably fix it.
> 
> Anyone opened one of these and successfully repaired it?  I've done that
> for a lot of other pots very similar to this one and I think it's quite
> doable but thought I'd ask here first.
> 
> If I can't fix it with a cleaning, then I think I could swap the internals
> with another similar pot or maybe just swap the LINE GAIN pot with the
> LOCAL GAIN pot as I really don't use the LINE AUDIO all that much (except
> to watch the meter because that's kind of fun to do).  I'd just get another
> pot but I'm not finding any just like it - at least not yet.
> 
> Thanks,
> Barry - N4BUQ
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