[TowerTalk] Antenna Stacking Question

[Jim Wilcox]

Thanks for the info, Tim.

I did some searching and see that there are some items about your article in
the TT archives--go there and do a search for

K3LR and W0IYH "choke" baluns in the feedline system

This indicates that the W0IYH balun is a Walt Maxwell (W2DU) bead balun.
>From what I can determine (i.e., Jerry Sevick's books), this type probably
is bested by Joe Reisert's toroid balun.

Please please believe me that I'm not trying to "get anything started" here,
but will you provide more info about what you mean when you say, "I have
tested every available commercial balun and the IYH choke baluns work much
better than any of them"?  I believe that there are several commercial
baluns that are precisely this (W2DU--W0IYH) type.  Can you provide some
data, e.g., actual measurements; how does the W0IYH design differ from that
of W2DU?

Thanks!

Jim, W3WV
________________________________
Jim Wilcox

----- Original Message ----- 
From: "Tim Duffy K3LR" <k3lr at k3lr.com>
To: "Bill Tippett" <btippett at alum.mit.edu>; <towertalk at contesting.com>;
<k2qmf at juno.com>
Sent: Wednesday, 16 July, 2003 14:58
Subject: Re: [TowerTalk] Antenna Stacking Question


I wrote a detailed 2 part stacking article that was published in CQ Contest
magazine five years ago. I don't have a copy, but Comtek Systems does and it
details the baluns that I use. The
Amidon part number and coax choice for both 75 and 50 ohms is listed in the
article. They were designed by W0IYH and I built and tested them using my HP
Network Analzyer. I have tested
every available commercial balun and the IYH choke baluns work much better
than any of them. I use them for lots of applications throughout my antenna
farm.

The article also has lots of hints for stacking 2 and 3 high stacks as well
as a full design for the RF switch box I use for all of my stacks (which
Comtek now sells).

You can obtain information on the baluns and stacking information from
Comtek at 704-542-4808.

I have no financial interest in any product Comtek sells.

73,
Tim K3LR
http://www.k3lr.com

Bill Tippett wrote:

> <http://lists.contesting.com/mailman/listinfo/towertalk>k2qmf at juno.com
> wrote:
>  >
>  > My question is what is the best way to feed the antennas???
>  > Can I use 1to1 antenna balun on each antenna or do I need to
>  > connect the coax directly to the antenna and maybe use some
>  > ferrite beads instead??
>
>          If you use a balun of any kind, make sure it is connected
> the same way to both antennas.  Many sealed baluns have phasing
> marks and these should be aligned, otherwise your antennas will
> be out of phase and will not work well.  If your baluns are not
> marked, check this post to determine phasing:
>
> http://dayton.akorn.net/pipermail/towertalk/2000-October/034295.html
>
>                                                  73,  Bill W4ZV
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

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