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

Sun Nov 14 14:38:36 EST 2004

It must have components that are more tolerant to heat. This is all moot 
since you're not going to transmitt with it anyway.
Steve N4LQ
----- Original Message ----- 
From: "denton" <denton at oregontrail.net>
To: <tentec at contesting.com>
Sent: Sunday, November 14, 2004 2:32 PM
Subject: Re: [TenTec] Hi power Ten Tec ant tuner swr drift?


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