[Elecraft] Connecting a BigIR

[Andy Durbin]

"1) IF contains the current operating frequency and changes between transmit/receive.
2) IF does not contain a "PTT" flag to indicate when the transceiver switches to transmit."

1 is true but 2 is not true.  IF P8 encodes the TX/RX status.  If you had read my paper you would have seen -

"The response to the IF; command includes, as parameter P8, information on whether the TS-590 is currently receiving or transmitting. The SDA 100 firmware could be modified to read the status of P8 and inhibit tuning if P8=1(TX active)."

The K4 IF structure is the same as Kenwood and K3 so it also includes TX/RX status.

73,
Andy, k3wyc