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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