I brought my KAT500/KPA500 setup to my winter home after getting it put
together and working with my K3 at my shore residence. Now I'm trying to get
it working with my Icom 7100. After setting up the Elecraft pair, only menu
item I see to set is in the KPA500, RADIO, set to ANALOG. I'm having two
The 4-wire AH4 connection doesn't PTT key the amp. It has 12v, ground, Start,
which is a signal from the Icom to the tuner that is asserted when you press
the Icom tune button, and ah4 key, which is asserted by the tuner when it needs
a tune level signal from the Icom. The amp needs a separate
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