[TenTec] [Q] weird SWR on JUPITER

[Carl Moreschi]

Ken,

When you key your paddle in SSB mode, almost no power
is transmitted because you are not talking into the mic.
So, because you are transmitting almost zero power, there
is no relected power detected at all, hence you see an SWR
of 1.0 to 1.  This is of course, not a valid reading because
you didn't transmit any appreciable power.


Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Ken Hopper" <khopper@uchicago.edu>
To: "tentec" <tentec@contesting.com>
Cc: "Ten-Tec Inc. Amateur Radio Sales" <sales@tentec.com>
Sent: Saturday, March 30, 2002 6:11 PM
Subject: [TenTec] [Q] weird SWR on JUPITER


> Jupiter runs great - but I am experiencing a really strange readout of SWR
on
> my JUPITER depending on mode.
>
> If I put it in CW mode about 20W, internal keyer off, and hit the dot
paddle
> the rig keys and shows 2.3:1.  If I switch modes to SSB and hit the same
> paddle it acts like PTT and shows 1.0:1 SWR.
>
> So I substituted a DUMMY LOAD and it has identical behavior - when in CW
the
> SWR to the dummy load is 2.7:1 and 1.0:1 in any other mode.  Band doesn't
make
> a lot of diff. Sometimes CW shows up as 1.8:1 or 1.6:1 on the dummy load.
20M
> seems to be the greatest diff.
>
> Why the diff? Has my internal tuner gone wakko?
>
> Thanks,
> Ken N9VV
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