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

[Steve N4LQ]

Information keeps leaking out. What's this about an "older and newer tuner"? 
What are they?

Steve N4LQ
----- Original Message ----- 
From: "denton" <denton at oregontrail.net>
To: <tentec at contesting.com>
Sent: Sunday, November 14, 2004 2:22 PM
Subject: Re: [TenTec] Hi power Ten Tec ant tuner swr drift?


> 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.
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>> TenTec at contesting.com
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>>>>
>>>>
>>>
>>>
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>>
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>
>
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