[Elecraft] No audio from P5

[W3FPR - Don Wilhelm]

Rolf,

It sounds to me like you have a malfunctioning connector - likely the one on
the end of the speaker cable.  If the terminals were malformed during the
assembly process, they are high on the list of suspects.

It is also possible that the headphone jack has failed - the contact that
provides the path for the speaker audio - you should be able to confirm (or
deny) that condition with a continuity check directly across the solder pads
of the headphone jack.

Along the same lines, and since your K2 is relatively new, you may try
re-flowing the solder joints for the headphone jack.  The pins barely stick
through the board and if insufficient heat is supplied to the pin a poor
solder connection can result (even if it looks good on the surface).

If you have a meter that will respond to audio (AC) voltage, try measuring
the voltage at RF Board P5 directly - if you have AC voltage there, the
problem is in the speaker connector or wire.  You can check the wire with an
ohmmeter.

73,
Don W3FPR

> -----Original Message-----
>
> Hi,
>
> My K2 (#4979) worked just fine untill yesterday. After setting L34 for
> the best
> signal-to-noise ratio and placing the top cover back onto the chassis I
> found, all
> of a sudden, that there were no audio from the internal speaker. And
> there were
> no sound from the external speaker jack either. Now I have only audio
> from the
> headphone jack. All worked well before. What can possibly have gone wrong?
>
> Rolf   SM0YQC
>
> K2 QRP, KSB2, KDSP2 and K160RX
>
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.338 / Virus Database: 267.10.13/78 - Release Date: 8/19/2005