[Elecraft] K2 and N1MM+

[Jim Brown]

On 12/7/2021 1:13 PM, edauer at aya.yale.edu wrote:
> Can it be done with just the K2/KIO2, a KUSB cable, and an ordinary

Remember that the DB9 connector on a K2 is NOT a standard RS232 
connector. Study the manual. To send CW via the computer serial port, a 
"level shifter" is needed. It's been a while, but I think I remember DTR 
driving a generic PNP with 5K in series with the base, and the collector 
to the K2 key input, emitter to keying return. Someone will correct me 
if I'm wrong.

73, Jim K9YC