Are you using the ferrite balun? If so, check its temperature too.
The stock balun in the this tuner is very unforgiving. When I built
this tuner back in 1985, I smoked the balun almost immediately
when I started using an amplifier with it.
----- Original Message -----
From: "denton" <firstname.lastname@example.org>
To: "Tentec Reflector" <email@example.com>
Sent: Sunday, November 14, 2004 8:43 AM
Subject: [TenTec] Hi power Ten Tec ant tuner swr drift?
> Hi all...
> I have recently purchased an old Ten Tec L network ant tuner..the one that
was in kit form many years ago.
> I have noticed that when feeding it to a 22 ft elevated ground plane on 80
meters (yeah I know, really a mismatch) via 450 ohm twin lead that the swr
will drift on 80 meters and the 2 kv ceramic caps on the cap switch will get
> Will switching the caps to transmitting micas alliviate the problem??
> Bad switch??
> 80 meters on this particular antenna apparently is the only band this
occurs with this transmatch...my 238A does not exhibit this little problem
when feeding the same antenna.
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