[Elecraft] K3 to Tokyo Hy-Power HL-1.5KFX??

[Phil & Debbie Salas]

Dave - The THP amp probably needs a TTL input.  While the K3 has the same 
band data output as Yaesu, the K3 output is open-drath whereas the Yaesu 
output is TTL.  Unless the THP amp has internal pull-up resistors on the 
band data input, you will need to add pull-up resistors to 5VDC to drive the 
THP amp band data inputs.

Phil - AD5X