...yeah, if someone has a web page where we could view the article that
would be great!
K4OJ
Jim Wilcox wrote:
> Thanks for the info, Tim.
>
> I was hoping you might remember some of the details, such as bead
> nomenclature.
>
> 48 inches! What a monster!
> :-)
>
> Maybe someone out there has access to the original article and can provide
> construction details, and maybe Z through the 80-through-10 range?
>
> Thanks again, Tim.
>
> vy 73
>
> Jim, W3WV
> ________________________________
> Jim Wilcox
>
> ----- Original Message -----
> From: "Tim Duffy K3LR" <k3lr@k3lr.com>
> To: "Jim Wilcox" <jim.wil@cox.net>
> Cc: <towertalk@contesting.com>
> Sent: Wednesday, 16 July, 2003 16:17
> Subject: Re: [TowerTalk] Antenna Stacking Question
>
>
> Hello Jim:
>
> The W0IYH balun uses the same physical idea for the choke, however he uses
> larger and different beads to increase the effectiveness and the power
> handling capability under various
> impedances. Therefore, the W2DU design and the W0IYH design are VERY
> different. I measured the W1JR balun and I believe the IYH design has better
> performance.
>
> There are NO commercial manufactures that are making the W0IYH choke to my
> knowledge. The design is 48 inches long.
>
> I do not have my lab notebook with me here in Oklahoma, however you can take
> my stamp of approval for what it is worth.
> I measured choke effectiveness, resonance and power handling capability
> under several load impedances in my tests.
> Many baluns do live up to their claim specifications. Several did not.
>
> I was looking for the BEST RF choke I could make or buy. The W0IYH design is
> what I use in my systems. Other stations have success with other
> chokes/baluns.
> I have measured the real world effectiveness of the IYH design in my antenna
> feedlines under contest high duty cycle conditions and they live up to my
> measurements in all respects.
>
> Other baluns will work fine in most applications where the BEST is not
> needed.
>
> 73,
> Tim K3LR
>
>
>
> Jim Wilcox wrote:
>
>
>>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@k3lr.com>
>>To: "Bill Tippett" <btippett@alum.mit.edu>; <towertalk@contesting.com>;
>><k2qmf@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.
>>
>>>_______________________________________________
>>>TowerTalk mailing list
>>>TowerTalk@contesting.com
>>>http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>_______________________________________________
>>
>>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.
>>
>>_______________________________________________
>>TowerTalk mailing list
>>TowerTalk@contesting.com
>>http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>_______________________________________________
>>
>>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.
>
>>_______________________________________________
>>TowerTalk mailing list
>>TowerTalk@contesting.com
>>http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> _______________________________________________
>
> 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.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
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