[Elecraft] K2 dual keying problem

[David Pratt]

Mindful that I am neglecting my hand keying, my sending being spoilt by 
the ease of using an iambic paddle, I have connected a straight key 
across the paddle keying line using a pair of 1N4148 diodes as shown in 
the K2 Manual.   This works reasonably well, but occasionally when 
pressing the straight key I get a string of alternate dots and dashes.

I presume that the problem is caused by the reverse resistance of the 
diodes being too low.  I tried putting two 1N4148 diodes in series in 
both lines. This is better but has not cured the problem completely. Has 
anyone else had this problem? Or does anyone have a suggestion as to how 
both a paddle and straight key may both be connected to the K2 with 
reliable results.

73 de David G4DMP