Re: [TenTec] Hi power Ten Tec ant tuner swr drift?

["Steve N4LQ" <n4lq@iglou.com>]

Mike.
I started to reply with a barage of antenna information and caught myself 
before I went off the deep end. Just let me conclude that:
1. That vertical is not balanced so forget about baluns. (Your feedline 
doesn't make the antenna balanced!)
2. It's too short for anything below 30 meters. (electrically)

3. You will burn up your tuner if you persist.
4. You are wasting huge amounts of RF in that system.
Suggestion:
Use whatever is holding up that vertical to support an inverted vee which is 
at least 100ft long and feed it with your 450 ohm line and tuner.
Or.  If you must have a short vertical, go buy one.


Steve N4LQ
----- Original Message ----- 
From: "denton" <denton@oregontrail.net>
To: <tentec@contesting.com>
Sent: Sunday, November 14, 2004 1:23 PM
Subject: Re: [TenTec] Hi power Ten Tec ant tuner swr drift?


> Got a couple of nice replies right off the bat...should of added more 
> specifics..
> I am running barefoot at 100 watts..no amp in the place
> I am not using the internal balun but was using a 4:1 current balun I 
> homebrewed as a remote balun...with 3 feet of rg-213 coax. I have 
> determined that the 4:1 current balun was not accepting power on 80 meters 
> and have replaced it with a homebrew 1:1 balun that I have verified as 
> being good via an antenna analyzer.
> I will replace the internal balun with something a lot more stouter...
> ----- Original Message ----- 
> From: "Michael Tope" <W4EF@dellroy.com>
> To: <tentec@contesting.com>
> Sent: Sunday, November 14, 2004 9:45 AM
> Subject: Re: [TenTec] Hi power Ten Tec ant tuner swr drift?
>
>
> > 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.
> >
> > Mike, W4EF....................
> >
> > ----- Original Message -----
> > From: "denton" <denton@oregontrail.net>
> > To: "Tentec Reflector" <tentec@contesting.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
> > really hot...
> > > 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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>
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