Re: KXPA100

[Edward R Cole]

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.

There are times I would like to monitor in Rx one of the ANT2
antennas but have to have amp powered ON to do that.  Is this
normal?  No problem monitoring 40 or 80m but inconvenient that I have
to have the amp turned on for other bands.

Yes, I could just use ANT1 to the SP4T but saving  tuning info is
nice with the two ports.  Invert-V is run in bypass while other bands in MAN.

73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
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[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.
>
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