Only when the antenna elements share a resonance 20/10; 40/15. Booms were
mostly overlooked until computers came along in everyones home and office.
Many manufacturers continued schleping the same tired design until new
upstart companies with computers showed them up. W2PV used an IBM mainframe
and was the first of the new breed.
Carl
KM1H
----- Original Message -----
From: "Peter Voelpel" <df3kv@t-online.de>
To: <TOWERTALK@contesting.com>
Sent: Thursday, July 19, 2007 5:47 PM
Subject: Re: [TowerTalk] Yagi designs?
>I always thought the problem with close spacing and stacking interference
> were not the booms, as the are not parallel to the elements, but the
> elements themselves?
>
> 73
> Peter
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of jeremy-ca
>
> Nothing beats the W2PV designs for gain or F/B especially over just the CW
> band. With 4 elements on 40/27/20 foot booms for 20/15/10M the wind load
> is
> less than designs with more elements. The booms are non resonant on any of
> those bands so stacking interference is minimized allowing closer spacing.
>
> Ive used them singly or in stacks since 1983.
>
> Carl
> KM1H
>
>
>
> ----- Original Message -----
> From: "Reicher, James" <JReicher@hrblock.com>
> To: <towertalk@contesting.com>
> Sent: Thursday, July 19, 2007 4:23 PM
> Subject: [TowerTalk] Yagi designs?
>
>
>> Does anyone have a good design for a home-brewed four element monoband
>> yagi for 20 meters, and maybe a 5 element yagi for 15 meters? I prefer
>> the CW end of the bands.
>>
>> 73 de N8AU, Jim in Raymore, MO
>>
>> Light travels faster than sound... This is why some people appear
>> bright until you hear them speak.
>>
>> _______________________________________________
>>
>>
>>
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>>
>
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