[Elecraft] Fwd: K1-4 s/n. 3206

[Don Wilhelm]

Scotty,

That is strange to happen all of a sudden unless the headphone jack has 
failed.
First make certain that the speaker cable is correctly inserted into P2 
and that the crimp pins on the speaker cable are correctly inserted into 
the housing.  Many builders have trouble with the crimp pins.  When 
correctly inserted in the housing, you can look into the rectangular 
holes of the housing and see the locking projection on the crimp pins 
properly locked onto the rectangular opening.

If your housing and crimp pins are OK, then remove the bottom cover and 
proceed as follows with your DMM
1 - Locate the switch on the back of your headphone jack - these are the 
3 solder pads at the rear of the jack. Check for continuity between P2 
pin 1 and one of the outer two pins of that switch (I forget which one 
it is, so check both - you should find continuity between P2 pin 1 and 
one of the outer ones,

If that was successful -- (if not, there is a soldering problem between 
the headphone jack and P2).
2 - Leave one of your DMM Probes on P2 pin 1 and then (with the 
headphone plug removed), check for continuity from the center pin to P2 
pin 1.

If the first test showed continuity, but the 2nd did not, then you have 
a bad switch in the headphone jack.

If this is an older K1, then I would suspect the headphine jack has 
failed, but if it is a new K1, I would first suspect the crimp pins on 
the speaker cable.

73,
Don W3FPR

On 10/5/2013 9:26 PM, Scotty Long wrote:
>
> Sent from my Verizon Wireless 4G LTE DROID
>
> -------- Original Message --------
> Subject: Re: [Elecraft] K1-4 s/n. 3206
> From: Scotty Long <nu0s at hotmail.com>
> To: don at w3fpr.com
> CC:
>
> Put all back together less the tuner now internal speaker is not working. Headphone jack normal audio. Any ideas speaker and wiring check good...
>
>