[Elecraft] keying circuit differences between K1 and K2

[Andrew Moore]

I wired up a cable for my K2 to allow me to transmit CW via the serial port 
on the PC, using a PC DOS package called "CW104.EXE" that drives the
the DTR.  DTR goes through a diode and a relay, and back to ground on the 
serial port, and the relay "output" pins go to the key input on the rig.

This works fine on the K2, but when I tried the same setup on the K1, the 
dots work fine but the dashes come across as broken up: sending a "T" 
sounds like "dit dit dit", or sometimes "dit dit".

I looked at the key input schematics for both rigs but I don't understand 
well enough what they're doing.  They do appear to be different.  Any ideas 
why this setup misbehaves on the K1, and what a fix might be?

And is anyone else actually attempting QRQ CW on the K1? :)

Thanks,
--Andrew, NV1B
CFO 963