Ed,
The relays in the KXAT100 are not latching types, and the NC contact of
the antenna selection relay defaults to ANT1.
I can see a potential solution to your problem since you have 1 port of
the external SP4T relay not connected - put that relay on ANT1 and the
80/40 antenna on the unused relay connector. That will give access to
all 4 antennas with power off the KXPA100/KXAT100. Put a dummy load on
ANT2 "just in case" of a 'fumble-fingered event'.
Alternately, swap the use of ANT1 and ANT2, so with power off, you can
access the beams - only when you want to monitor 80/40 do you need to
power the KXPA100/KXAT100.
73,
Don W3FPR
On 11/12/2019 4:16 PM, Edward R Cole wrote:
Quick question. I have the KXAT100 installed which provides two antenna
ports. It switches between fine, but I note that it defaults back to
ANT1 when amp power is shut off on front panel.
I have a 80/40m invert-V attached to ANT1 and a SP4T relay attached to
ANT2. The relay permits choosing my triband yagi or two different 6m
yagis, fourth port NC.
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