[Elecraft] KAT500 Question - Manual Mode Light is Flashing

[Andy Durbin]

"When I have the Tuner in By-Pass Mode for an antenna with a low SWR, even when making small changes in the frequency, the Tune switches to MAN (Manual Mode) and the MAN light is flashing. How do I get it to stay in By-Pass Mode."

One reason for flashing MAN is that KAT500 has entered auto tune mode and is waiting for sufficient power to start the solution search.  I don't know if this is the reason in your case.  Do you have the ability to log the commands your Flex is sending to KAT500?  Is it possible your Flex commanded autotune (FT;)?

I never run my KAT500 in BYP mode after I found defects in the antenna selection logic when BYP mode is active.  I always run in MAN mode and MAN mode with bypass active is electrically identical to BYP mode as far as the tuning solution is concerned.

Andy, k3wyc