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

[denton]

What I was originally trying to determine is why the older tuner would have 
swr drift while the new one didn't.
I feed the base of the verticle with a 2:1 balun running in reverse...then 
to 450 ohm twin lead to a 1:1 remote balun on the otherside of the wall of 
the hamshack. titanex has a 32 ft verticle they feed the same way...
I don't really intend to use the 22 ft verticle to xmit on 80 meters...I 
have an 80 meter drouping doublet I use for that purpose...
I do intend to use the verticle on 40 thru 10 meters. It is currently has an 
elevated feedpoint of 18 feet with 4 22' radials. With the whole system 
elevated, I am trying to avoid running the verticle ground mounted, thus not 
have to bury some 30 to 50 radials and the inherent ground losses.
I have used this particular antenna as a 16 ft verticle with 16 ft radials 
to some degree of success on 20 thru 10 meters.
----- Original Message ----- 
From: "Steve N4LQ" <n4lq at iglou.com>
To: <tentec at contesting.com>
Sent: Sunday, November 14, 2004 11:02 AM
Subject: Re: [TenTec] Hi power Ten Tec ant tuner swr drift?


> 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 at oregontrail.net>
> To: <tentec at 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 at dellroy.com>
>> To: <tentec at 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 at oregontrail.net>
>>> To: "Tentec Reflector" <tentec at 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.
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>>
>>
>>
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>
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