[Elecraft] K3S with Internal ATU(KAT3A) and Remote ATU?

[MaverickNH]

I have a new K3S/100W with internal ATU (KAT3A) as well as KRX3A SubRX. My
antennas are a 102ft G5RV at 40ft with LDG RC/RT-100 Remote ATU at base, and
I’ll have a DXE-MBVE-5 43ft vertical with MFJ-927 Remote ATU at base after
completing this weekend.

A few questions:

1.	How to best use the K3S internal ATU in conjunction with the Remote ATUs?
Both can be used in Bypass mode, the K3S by command and the Remote ATUs by
removing Bias-T voltage. The LDG rATU on the G5RV is “latched” in the last
LC configuration before removing Bias-T voltage – still learning about
MFJ-927. It seems that I might first put the K3S in Bypass, remote tune, and
then if >2:1 SWR, remove voltage from Bias-T to “latch” the remote ATU, and
then engage the K3S internal ATU to try and lower SWR to <2:1. Added loss,
but maybe better than K3S power fold-back. But that’s where I need advice.

2.	I’ll set up for “Diversity RX” when I figure which antenna should be my
TX antenna, which might change based on band and direction (G5RV is N-S, and
even at 40ft, reaches E-W better than N-S). In this case, I wonder if I
could tune my SubRX “Diversity RX Antenna” with remote ATU for better
reception?





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