[Elecraft] KXPA100

[Don Wilhelm]

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.
>