[Elecraft] Adding KPA100 to KAT100-2

[Tom Z]

Well, the good news is that everything is working fine. I actually had
two of the RF cables reversed - tried to make the connections from
memory - not smart.

This turned out to be a very easy exercise, and I like the result. Now
I keep the K2 in "barefoot" configuration, and the KPA100 and tuner
are both outboard. The only extra thing I had to do while making this
modification was to scrape paint from the side panels to get good
ground connectivity. I don't think the instructions for the KAT100-2
ever told me to do so.

Thanks for your help and comments.

73,

Tom KG3V


On 9/7/07, Dave Van Wallaghen <w8fgu at comcast.net> wrote:
> Hey Tom,
> If I'm reading what you wrote correctly, it looks like you have it connected
> correctly. Here is a link to Lyle Johnson's website if you don't have it
> already: http://www.kk7p.com/k2kpa100.html
> Go near the bottom of the page. He has some nice pictures of what it all
> looks like connected.
>
> If I remember right, I actually plugged (read muscled) the Aux RF connector
> in reverse. Not sure if that could cause what you're seeing. Also not sure
> what tuning into an open load would do either.
>
> I'm sure that many on the list brighter than me will give you some good
> advice.
>
> Good luck & 73,
> Dave W8FGU
>
> > -----Original Message-----
> > From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
> > bounces at mailman.qth.net] On Behalf Of Tom Z
> > Sent: Friday, September 07, 2007 8:55 PM
> > To: Elecraft at mailman.qth.net
> > Subject: [Elecraft] Adding KPA100 to KAT100-2
> >
> > I am finally getting around to moving my KPA100 from the K2 case to
> > the EC2 enclosure that houses my KAT100 tuner. I must be missing
> > something obvious - basic K2 appears to work but never accesses ANT2
> > and none of the KAT100 SWR lights work (although the AN1/2 LEDs do
> > work, and think they are switching).
> >
> > Here is what I think are the connections:
> > Internal to the EC2:
> > AUX connector on KPA100 to AUX header on KAT100 board
> > AUX 12V connector on KPA100 to AUX12v connector on KAT100 board
> > AUX RF connector on KPA100 to AUX RF connector on KAT100 board
> >
> > External connections:
> > 12V connected to K2 and KPA100 (but not to KAT100)
> > AUX/IO connector from K2 to KPA100 AUX/IO connector
> > K2 ANT OUT (BNC) to AUX RF (BNC) on KAT100
> > KPA100 RF OUT to KAT100 RF IN
> > ANT1 and ANT 2 to my antennas
> >
> > When I try to tune, the KAT100 relays do some clicking, but no SWR
> > LEDs illuminate. The first time I tried this, I had the KPA100 ANT
> > connector open - so hopefully I did not damage anything (was running
> > only 20 w TUNE for a few seconds)
> >
> > Possible error - do I need to connect the external AUX connector to
> > the KAT100 connector, instead of the KPA100 connecotr?
> >
> > Any help appreciated.
> >
> > 73,
> >
> > Tom KG3V
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