[Elecraft] k2 earphone jack

[drewko1 at verizon.net]

On Thu, 24 Jan 2008 10:08:26 -0500, Don W3FPR wrote:

>If you are going to add the toggle switch, there is no need to replace 
>the jack.
>The toggle switch replaces the contacts that no longer work.
>73,
>Don W3FPR
>


The defective contact lies at the rear pins of the jack, which you can
easily parallel with one pole of the switch. But you will also want to
switch the ground (i.e., sleeve) terminal of the jack with the other
pole, opposite  throw (a DPDT switch). If you don't switch the
ground/sleeve line the headphones will end up being in parallel with
the speaker when it is selected. 

The ground/sleeve terminal lies on the board side of the jack so you
will have to remove the jack to get to it; might as well replace it
with a good jack.  

Of course, you could leave the defective jack in place, cut the ground
circuit trace and solder tack the switch across it. But that's no
easier than just replacing the jack with a good one, and no messing
with the traces.

Referring to my notes, the switch I used was p/n: 8011 from
Web-tronics. It is a DPDT (on-x-on) miniature size. Fits neatly in the
transverter hole beneath the speaker jack.

73,
Drew
AF2Z