[TenTec] Jupiter/LDG AT-11MP Tuner

[Lee Groce]

----- Original Message -----
From: <WmLB@attbi.com>
To: <tentec@contesting.com>
Sent: Tuesday, January 07, 2003 23:35
Subject: [TenTec] Jupiter/LDG AT-11MP Tuner

 Hi Bill,
 I bought a Jupiter with the internal antenna tuner in early April 2002.
It has acted strange at times too. TT told me as long as swr did not
exceed 2:1 I would be ok.

 Last Saturday, a friend dropped by and I showed him my Jupiter.
I had the power at about 40 per cent and noticed as he played with
the key swr was nearing 2:1 on 40 Meter CW. After he left, I played
around and could not get swr below 2:1 on any band.
Two days ago I was on 40 Meters and the internal tuner tuned from
1.0:1 to 1.6:1 on all bands just fine.  Now I am confused! This is not
the first time this has happened either.
For those who may think it's in my antenna; when my internal auto
antenna tuner would not tune below an swr of 2:1 and higher, my manual
antenna tuner tuned to 1.2:1 as soon as I put it in line.

I want to talk to the folks at TT and see if they will take out my
internal
antenna tuner and replace it with the external LDG AT-11MP Tuner
thinking it may work better.

Has anyone else experienced similar problems with the Jupiter/AT ?
After reading what Bill has to say, I am at a loss of what to do.

73,
Lee  N4AAD


> I bought the subject tuner Saturday for use with my Jupiter.
>
> It has been acting a bit "squirrely" I guess. It tunes for a good SWR
on
> low power  but that SWR seems to increase as output is increased.  In
most
> cases I can touch up the SWR (under higher power) using one or both of
the
> Cap and Ind. Up/ Down switches. These increase or decrease those two
> elements in incremental amounts (fine tuning  I guess you would call
it.)
>
> I called LDG today and was left with two thoughts:
>
> 1.  I should not try to reduce the SWR at power levels any greater
then 25
> watts or so.
>
> 2.  He mentioned that there has been some reported "problems"
> (un-specified) with the tuner working properly with Ten-Tec rigs. Part
of
> it apparently related to the fact that the TT rigs do not "fold -back"
at
> higher SWRs.
>
> I am sort of inclined to return this tuner, but thought I would ask
here
> and see if there is any "real world" knowledge on the compatibility
(or
> lack thereof)  between these two pieces of equipment.  I know Ten-Tec
was
> marketed a internal version of the AT-11 in kit form for use in the
> Jupiter. I guess that made me assume that the external version would
also
> insure a large degree of compatibility.
>
> Any comments would be appreciated..  I subscribe to the digest so, if
you
> have timely comments that you think are significant in helping me
decide
> what to do.. please email me direct.
>
> Thanks..
>
> Bill, W6WLB
>
>
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