"When I first connected the KAT to my system using the instructions give to me 
by Rob at Elecraft the KAT goes into Bypass upon power-up. What is wrong?"

Why do you assume anything is wrong?

Bypass Mode, Auto mode with Bypass state, and MAN mode with Bypass state are 
all valid KAT500 conditions and not necessarily indicative of any problem.

I'll avoid the admonishment to RTFM since the KAT500 User's Guide is still at 
Revision D1, August 15, 2019.  This predates the firmware change that allows 
BYP LED to be lit at the same time as AUTO or MAN LED.

If BYP is lit together with AUTO or MAN it simply means the tuner is in BYPASS 
state which is electrically identical (as far as the RF path is concerned) to 
BYP mode.

Andy, k3wyc





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