[Elecraft] KAT500 Tuner antenna selection stuck in #2 position

[Andy Durbin]

"I cannot change the antenna selector via the front panel of the KAT500 or the utility software."

What was the KAT500 mode when you observed this problem?  There is a known firmware defect that may prevent enabled antennas being selected when mode is BYP.  The same problem does not exist if mode is MAN and state is Bypassed.  Until this is fixed the solution is to avoid mode BYP (Mode MAN and state bypass is electrically identical).

73,
Andy, k3wyc