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@oregontrail.net>
To: <tentec@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@iglou.com>
To: <tentec@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@oregontrail.net>
To: <tentec@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@iglou.com>
To: <tentec@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@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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