[Elecraft] SP3 intermittent A/B switch

[Grant Youngman]

Mike ..

This has come up before, at least once.  I think I’d try giving it a spritz of DeOxit and then working it a few times.  One suggestion was to run about 1ma of dc current through it and switch it a few times to clean it.  (I’m not sure I’d go that far, but it might work).

You can request the part number, price, and, I presume, stock status through the Support -> Parts Order From web-link, or just give them a call on Monday.

Grant NQ5T




> On Jul 25, 2020, at 6:38 PM, mjpilgrim <mpilgrim at bellsouth.net> wrote:
> 
> My apologies if I've overlooked SP3 discussions including this annoying
> symptom on mine.  I purchased this SP3 new  a couple years ago.  After a few
> weeks i noticed the A/B selector switch had become rather touchy, and at
> times the audio would not be present unless I jiggled the switch a few
> times.  I sort of migrated away from listening aloud, resorting to my
> headphones in order to reduce disruptive noise for the family.  Recently I
> decided to listen through the SP3 and was quickly reminded there was a
> problem.  in order to listen, I have to periodically jiggle the A/B switch
> or activate it back and forth between A and B until finally the audio comes
> through clearly.  I swapped inputs from A to B and back again, but nothing
> helped.
> 
> Am I dealing with a known problem on the SP3, and if so, is there a simple
> remedy?  If a new switch is advised, is that available from Elecraft?  I
> welcome any helpful suggestions.
> Thanks.
> Be safe.  73's
> Mike Pilgrim, K5MP, Boca Raton, Fl