[Elecraft] K2: diodes for using straight key?

[Brian Mury]

On Sat, 2010-02-06 at 20:31 -0800, dw wrote:
> It seems I read somewhere that there is a diode mod for the K2 so that a
> straight key can be input into the unit along with a paddle and the K2
> can tell the difference and one can use both keys?
> 
> Or was I dreaming :)

You were not dreaming! The K2 will treat a simultaneous contact closure
of both the dot and the dash lines as a straight key. The two diodes are
there to eliminate the short circuit that would otherwise exist between
the two sides of the paddle, which would cause a contact closure on
either side of the paddle to ground both sides (and therefore be treated
as a straight key as well).

The circuit is on page 95 of the K2 manual. There is also a menu item
that you will need to ensure is turned on.

73, Brian
VE7NGR