[Elecraft] Lost Speaker Output on K3 with no phones plugged in

[Don Wilhelm]

Bob,

Try inserting the headphone plug and removing it several times (with the 
SPKR+ PH menu set to NO).
The wiping action of the contacts on the headphone jack may restore 
proper speaker response.

Further explanation - if you normally use headphones, oxidation can 
occur on the contact points of the headphone jack.  Insertion and 
removal of the headphone plug should create a 'wiping' action on the 
contacts that should wipe away that oxidation.  It may take several 
"wipes" to remove the oxidation, so exercise it a bit before declaring 
that the headphone jack is "dead".

73,
Don W3FPR

On 1/26/2014 5:29 PM, Bob wrote:
> After working just fine (no phones plugged in==> speaker on, phones plugged
> in ==> speaker cuts off), I just removed my headphones and have no speaker
> output.
>
> I immediately checked the SPKR+PH setting, usually set to "no", and
> adjusted it to "yes".  At that point I have output from the speakers.  So
> there doesn't appear to be anything wrong in the audio chain.
>
> I presume whatever mechanical part of the PHONES jack that senses the
> headphones are plugged in has failed.  But I thought I would check to see
> if anyone had similar issues with a different cause in the past?
>
> My K3 is about 2 years old at this point, so fairly "low mileage"
>
>