[Elecraft] Adding KPA-500/KAT-500 to K3s

[Kevin, N4TT]

I just got the second aux cable and have the physical setup completed
according to the docs.

The only configuration item that I changed was to set KAT500Y in
CONFIG:KAT3. The K3s ATU is in bypass mode.

I expected to be able to hit the ATU TUNE button on the K3s and initiate a
tune through the KAT500. Is this not an option? When I hit ATU TUNE the
display shows NO ATU.

I also saw mention of setting power for barefoot and amp modes but I
haven't figured out how that's set up. What prevents the K3s from sending
too much power to the KPA500 in operate? Does it just know or do I have a
setting I'm missing?

73,
Kev N4TT