[Elecraft] FT897D and KPA500

[Dave Johnson]

Dave, I used to have an FT857D, which is probably the same
connections. The 857 has a connection in the mini DIN socket that will
ground the keying input of a low voltage keying line of a linear, I am
not sure of the maximum voltage but 12 volts from the Acom was OK. I
used my 857 with an Acom 1000, so the same output will also key a
KPA500. I do not have the circuit to hand but it will be a
straightforward (if a bit fiddly) connection.

Beware that the FT857D and no doubt the 897D, is prone to serious ALC
problems which result in high power spikes on transmit. See
http://www.astromag.co.uk/ft857d/ for details and a "work around".

73 Dave, G4AON

>I am having difficulties keying my KPA500 from my Yaesu FT897D