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Re[2]: [TowerTalk] TH7 versus KT34XA

To: <towertalk@contesting.com>
Subject: Re[2]: [TowerTalk] TH7 versus KT34XA
From: ai7b@teleport.com (Bob Wruble)
Date: Fri, 27 Jun 1997 07:50:38 -0700
you can't beat ht-gain ants as good all around performers.  have 
used many of them over the years.  i tried my 3 stack of kt34x's
as an experiment and chose them becuz of swr/banmdwidth and the
success that a few top contesters have had with them.....

rich n7tr ex ki3v usees a 3 stack of th7's with very good contest
results....

i don't think you can go very far wrong with ht-gain...they are a hell of a 
lot easier to assemble and maintain......the only btr answer is to use
monobanders !!

73 de bob   w7gg

----------
> From: Dave Raymond-CSUS04 <Dave_Raymond-CSUS04@email.mot.com>
> To: towertalk@contesting.com
> Subject: Re[2]: [TowerTalk] TH7 versus KT34XA
To: <towertalk@contesting.com>
> Date: Thursday, June 26, 1997 11:31 AM
> 
> Message authorized by:
>     : ai7b@teleport.com@INTERNET at EMAIL
> 
>      The KT34XA stack sounds like a very successful array.
>      
>      I have 3 TH7s stacked at 40', 80', and 120'.  Performancewise, it 
>      compares very well against three and four yagi monoband stacks with 
>      antennas of larger boomlengths.  Overall, I'm very pleased with it's 
>      performance.
>      
>      I like the TH7 antenna because of its ruggedness and simplicity of 
>      construction.  I also like the ready availability of good support and 
>      repair parts from HyGain.  In the eight months its been up, the array 
>      here has been exposed to 75+ mph winds on three separate occasions.   
>      Winters here in Iowa are no picnic.  So far, the TH7s have held up 
>      just fine.
>      
>      73,
>      
>      Dave
>      W0FLS
> 
> 
> ______________________________ Reply Separator 
> _________________________________
> Subject: Re: [TowerTalk] TH7 versus KT34XA
> Author:  owner-towertalk@contesting.com@INTERNET at EMAIL
To: <towertalk@contesting.com>
> Date:    6/26/97 11:17 AM
> 
> 
> Have 3 kt34'xa in a stack.....i went with kt34xa's becuz if the 
> success of certain well known contesters who used a
> single kt34xa at 70' to kick butt for years.......Dan Honda 
> w7wa.  I also like the broadband characteristics of the double 
> driven element design.
>      
> kt34'xas are a bitch to build (at least very time consuming) 
> and if u make an error early on in construction you get to
> rebuild them !!  but if u take ur time and follow the instructions 
> to the letter and remeasure each element CAREFULLY before
> putting the antenna in the air it will wk as advertised.
>      
> My three are at 92,132 and 172' a bit high some mite argue? 
> Actual performance for me is still a bit of a question mark since 
> have had only 20m prop to run checks on.
>      
> I have an old Telrex TB-6 on another 105" foot twr as a reference 
> ........sometimes the stack  is no better than the single tb-6.... 
> sometimes the stack is btr but  not by as much as i wud like (6-8db) 
> considering the investment  in aluminum. and effort in putting them up!
>      
> I am hoping they will do btr on 10-15.    Had a incident in the AA 
> test this past wkend on 15 where a few JA's were leaking thru
> on the stack but i cud not hear most of them on the tri-bander!! 
> will see......
>      
> yes the swr is higher on 15m as they say it will....but in general the 
> swr curves on mine follow the curves in the book.
>      
> in summary you can not take enuf care in assembling these puppies.
> when i first got my three i hurried into construction for a solid week with 
> a helper only to find out when i went to put the 1/2 elements on the
> booms that idiots had shipped me kt34's by mistake (not xa's) so i had 
> to restart from scratch....needles to say i was pissed.
>      
> best solution to putting a kt34 together is to find someone that has done 
> it b4 if u can it will make a hell of a difference.......
>      
> ----------
> > From: David L. Thompson <thompson@mindspring.com> 
> > To: towertalk@contesting.com
> > Subject: [TowerTalk] TH7 versus KT34XA 
To: <towertalk@contesting.com>
> > Date: Thursday, June 26, 1997 7:45 AM 
> >
> > Bill, W4AN is right..the KT34XA is a pain in the butt. But when it works 
> > its 
> > great.  Mine was beat up by Opal in Oct 1995.  The reflector has flipped
> > over and is now upside down.  15 meters has high SWR.  20 meters requires 
> > the tuner and it keeps changing tuning.  I have replaced caps twice since 
> > 1981 when I got it...and I have a crank up so I can bring it down to roof 
> > level to work on it.  Altho cranking it down is a chore.
> >
> > I would suspect the problem with the TH7 would be the traps. 
> >
> > Now someone at Hy-Gain passed the word that the TH11 has improved
> > performance on 10 and 20 over the TH7.  Is this selling hype or truth? 
> >
> > I run across a few who swear by the Sommer XP807.  KM1E wrote a nice 
> > article 
> > in the Dx magazine about selecting one antenna for 20 to 10 including the
> > WARC bands.  I ran into him comparing the Sommer to the nice 4el that KA1PE 
> > uses on 17.  Compared nicely on short skip and FK8CP said they were the 
> > same 
> > at his QTH except KM1E faded a bit more.
> >
> > I think any of the above and perhaps the big Fritzels are all very close.  
> > I 
> > would say don't spend too much time comparing...get one and get on the air. 
> >
> > An advocate of "GAD"...Go and do it! 
> >
> > Dave K4JRB
> >
> >
> > --
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>      
> --
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