[Elecraft] K3 test mode

[William Ravenel]

Hasn't been a problem here but I have occasionally have trouble not holding the tune button long enough and chang antennas instead. I usually catch it but since I currently only use one antenna I've attached a dummy load to the Antenna 2 connection to protect against accidentally tuning or transmitting with no load. A variable length "hold" setting would be nice but not sure how high on the list I'd place it.

Will, AI4VE