[R-390] Misbehaving Audio Pot

[Barry]

I really should get some of that.  For now, I'm going to open it up and clean it.  I really suspect some conductive dust has accumulated near the fully CCW position and wiping that up will take care of it.  We'll see.

Thanks,
Barry - N4BUQ

> 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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