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

Sun Nov 14 14:32:31 EST 2004

The older tuner is a Ten Tec 4229..the kit form of a 229 tuner.
The newer one is a Ten Tec 238A tuner...same as the new ones except the 
paint job it a bit different.
----- Original Message ----- 
From: "Steve N4LQ" <n4lq at iglou.com>
To: <tentec at contesting.com>
Sent: Sunday, November 14, 2004 11:27 AM
Subject: Re: [TenTec] Hi power Ten Tec ant tuner swr drift?


> 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.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> TenTec mailing list
>>>>> TenTec at contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>>>
>>>>>
>>>>
>>>>
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>>>
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>>>
>>
>>
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>
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