RE [Elecraft] K2-CW auto-detect

Masleid, Michael A. [email protected]
Thu Aug 14 15:19:02 2003


> The problem is when I start using the key, the auto-detect fails about =
every
> 10 to 20 key strokes and starts to send iambic dah-di-dah-di .... =
until I
> lift the key.

Ed,

It sounds like an RF problem.  Try holding the MODE button while in CW =
mode to put the K2 into test.
Listen to the side while you use the key.  If this works, but it doesn't =
in operate mode, then it is an RF
problem.

I'm guessing that C1 and C2 on the RF board are being charged up through =
the 1N4148s from
"RF in the shack".  If C1 and C2 don't charge up equally, then on key =
closure, and discharge through
R1 and R2, the DOT and DASH line will go through voltage sense threshold =
at different times, and
register as a paddle instead of a key.

73, Michael AB9GV