I had printed the articles out before they disappeared. When I get the
scanner back
up I could e-mail you a copy if you like (may be another week or so).
Several others
have also asked and the offer is open to them as well. The 10M 24 foot boom
is only
two pages - most of which I posted earlier and just doesn't have the SWR and
F/B
graphs. The main article was the 20M article (I forget how many pages that
is - 7-8?).
73, Larry W6NWS
----- Original Message -----
From: <john@kk9a.com>
To: "Larry" <w6nws@arrl.net>
Sent: Monday, November 02, 2009 8:19 PM
Subject: Re: [TowerTalk] 10m OWA 24'
> Actually I was looking for the article, but thanks for the info. I built
> two 60' boom 20m OWAs this summer (http://www.qrz.com/db/w4aaa ) and
> thought
> that I may copy Nathans 15m design, or at least use it for comparison for
> some new 15m beams. I have been able to find bits and pieces of his
> information on the internet, but I wish that I had downloaded the article
> when it was available, or at least printed it.
>
> 73,
> John
>
>
>
> ----- Original Message -----
> From: "Larry" <lknain@nc.rr.com>
> To: <john@kk9a.com>
> Sent: Monday, November 02, 2009 8:00 PM
> Subject: Re: [TowerTalk] 10m OWA 24'
>
>
> I have the article but my machine with a scanner crashed a week ago and I
> haven't
> gotten to rebuilding it yet. Here is what I sent - extracted from the NW3Z
> article:
>
>
> Elements: 24 inches 0.75 dia
> 42 inches 0.625 dia (24 inches inside the 0.75 tubing)
> tip+4 inches 0.5 dia
>
> fr Ref tip
> Reflector 0 65.52
> DE 43.86 61.59
> D1 69.18 55.90
> D2 131.3 53.88
> D3 192.7 54.17
> D4 282.0 49.57
>
> (cm = inches * 2.54)
>
> The article didn't say what the mounting bracket size is but the others
> used
> 8 inches x 4 inch x 0.375 inch aluminum stock.
>
> VSWR in the article sloped downward from 1.2 at 28.0 MHz to just under 1.1
> at about 28.65 MHz and the rose sharply to almost 1.5 at 29.0 MHz.
>
> Gain was about 10.1 dBi and nearly flat across the band. F/B rose from
> about
> 22.5 db to about 26 db at 28.3 MHz and fell slowly to about 22 db at 28.9
> MHz where it was flat to 29.0 MHz (as far as the plot went).
>
> There was also an article for a 48 foot boom 10M yagi. There were also
> articles
> for 20, 15, and a 20/15 yagi.
>
> 73, Larry W6NWS
> ----- Original Message -----
> From: <john@kk9a.com>
> To: <w6nws@arrl.net>
> Sent: Monday, November 02, 2009 7:42 PM
> Subject: Re: [TowerTalk] 10m OWA 24'
>
>
>> Hello Larry
>>
>> Do you have the NW3Z / WA3FET article or just the 10m dimensions. If you
>> have the article I would appreciate a copy.
>>
>> John KK9A . P40A
>>
>>
>> To: "TowerTalk" <towertalk@contesting.com>
>> Subject: Re: [TowerTalk] 10m OWA 24'
>> From: "Larry" <lknain@nc.rr.com>
>> Reply-to: Larry <w6nws@arrl.net>
>> Date: Mon, 2 Nov 2009 18:27:10 -0500
>> List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
>>
>> I had a copy of the article and sent the dimensions direct to Joern.
>>
>> 73, Larry W6NWS
>>
>>
>
>
>
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