The K3 has a per-band/per-antenna DIGOUT1 line on the 15pin AUX connector.
If you use the Elecraft 15-pin AUX cable, DIGOUT1 is tied to the KPA500
inhibit line. So, DIGOUT1=ON means AMP INHIBIT=ON.
For example, if you have a SteppIR (which can be resonant at 40m and up) on
ANT1, you can set
For you who will be soon getting a KPA500 to add to your K3, don't forget to
download the latest firmware for the K3: MCU 4.36, DSP, DSP2.73. Probably most
have already routinely downloaded these .Among other things, these updates
enable the individual band buttons on the KPA500 to set the
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