[Elecraft] K2 keyer problem

Fri May 16 19:09:00 2003

Check:

the paddles: are both sides really closing?  Use your ohm meter.
the connections to the stereo plug; try shorting the connections with a clip
      lead to ground.
the stereo jack itself: are the swipes making proper contact
the solder connections to the jack and to R1 and R2 on the RF board.
finally, use a 220 ohm resistor and touch it between pin 29 and ground and
      then between pin 30 and ground of U6 on the control board.  If you
      don't get dots when connected to pin 29 and dashes when connected to
      pin 30, then there is something wrong with U6.  Check that it is
      properly installed and seated.
If you do get dots and dashes with direct connections to U6, then start
      tracing back from these pins to P3 of the control board and back
      through J8 of the RF board back to the key jack.

best wishes,

dave belsley, w1euy

--On Friday, May 16, 2003 4:55 PM -0400 Andy Bullington 
<[email protected]> wrote:

> I've gotten to the first stage of tests in my K2 and am having a problem
> with the keyer. Only one side of my paddles seems to work. If I switch to
> left hand configuration the dits change to dahs on the working side but
> thats it. I've tried 2 different cords and 2 different sets of paddles.
> Any Ideas? Everything else in the stage 1 tests checks out fine. Thanks
> guys.                Andy W1AWB
>
>
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----------------------------------
David A. Belsley
Professor of Economics