Re[2]: [TowerTalk] KLM-KT34XA Vs. ?? Recommendations

[i4jmy@iol.it]

After having spent a lot of time (one year ago) in modeling the KT34 I 
own, I came to the conclusion that little can be done in terms of gain, 
and the 15m band will remain the less "positive" band of this antenna.
Often, computer modeling show good numbers associated with very 
critical dimensions (or narrow bandwidth) but one should stay warned 
about the software limitations or then, to the possibility to 
practically realize such critical antennas, expecially when 
unconventional traps are involved in the design.
No traps and different spacings of parasitic elements insure bigger 
results than KT34 in terms of gain and F/B but if turning radius is a 
matter and 20m gain a goal, this antenna is slightly better than other 
tribanders.
On the contrary, on 15m band and concerning F/B I found other 
tribanders performing better (or much better) than KT34.
Mechanically there are a lot of exposed joints in the traps/loading of 
a KT34 and because of the exposed traps/loading system the KT34 is not 
working with snow. 

73
Mauri I4JMY
  




> ---------- Initial message -----------
> 
> From    : owner-towertalk@contesting.com
> To      : "Tyler Stewart" <k3mm@ex-pressnet.com>, 
<towertalk@contesting.com>,   "Dave Hachadorian" <k6ll@juno.com>
> Cc      : 
> Date    : Sun, 27 Aug 2000 20:59:05 -0700
> Subject : Re: Re[2]: [TowerTalk] KLM-KT34XA Vs. ?? Recommendations
> 
> 
> 
> Per Mike Stahl at M^2, the new computer optimized KT36XA is supposed 
to
> deliver
> "approximately 1dB more forward gain than the KT34XA". Dunno if this 
is
> across the
> board or an average of all three bands. Also, I am not sure what 
methods
> were used
> to validate the computer model. As you all know I'm sure, accurate 
gain
> measurements
> at these frequencies are not easily done.
> 
> Mike, W4EF
> 
> ----- Original Message -----
> From: "Tyler Stewart" <k3mm@ex-pressnet.com>
> To: <towertalk@contesting.com>; "Dave Hachadorian" <k6ll@juno.com>
> Sent: Sunday, August 27, 2000 7:45 PM
> Subject: Re: Re[2]: [TowerTalk] KLM-KT34XA Vs. ?? Recommendations
> 
> 
> >
> > Amen to that, Dave.
> >
> > Yeah, they aint the greatest thing out there at this moment...they 
were
> > designed without modern computer models.  However, the Champion 
review
> > obviously had a bad example of a KT34XA.  Yes, it's 15 meter F/B is 
not
> the
> > best, but it certainly isnt anywhere near as bad as they claim.
> >
> > It's still a very efficient antenna, but I'm hoping that M2 is 
going to
> > improve the situation for those of us with the investment in KLM
> tribanders
> > by introducing a significant update kit that will bring it up to 
speed
> with
> > the multi-monobander counterparts.
> >
> > 73, Ty K3MM
> >



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