[R-390] Misbehaving Audio Pot

[Barry]

If my attempt to open and clean this one doesn't work, I'll probably get back with you.

Thanks!
Barry - N4BUQ

> Barry,I have a new old stock 2.5K pot your welcome to have.  The shaft is 0.45
> long from the c-ring stop just above the 3/ 8 diameter threaded shaft.Never
> been used but well stored.Let me know .John N3JKE
> 
> 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
>> ______________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:R-390 at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html