[TowerTalk] What is the largest 20mtr monobander you have ever seen?

[Eric Scace K3NA]

   During the 1980s OH8OS built a rotatable stack system on 20m that was truly impressive.  As best as I can recall from a technical
report, the array contained 48 or 64 elements (I can't remember which) on a single, rotatable tower.  At each height there was a
cross-arm that supported two yagis with the elements lined up.  I think the system had 4 heights and 8 yagis with 6 or 8 elements
per yagi.  OH8OS had a custom micro-processor system that would attempt to select the correct phasing arrangement to maximize the
received signal.  Because of the parallel yagis at each level, the beamwidth was relatively narrow -- but appropriate for his QTH
when beaming to North America.

   The system was awesome both mechanically and electrically.  As a 20m operator during W3LPL's early years as a multi-multi
station, I remember many hours listening to OH8OS running USA stations in the middle of the night on 20m... his signal heavily
modulated by auroral flutter... and OH8OS being the ONLY signal on the band.

   Sadly, I heard that an ice storm caused serious damage.  It is difficult to muster the same level of enthusiasm to rebuild as one
has in the initial ground-breaking creation.

73,
   -- Eric K3NA

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com]On Behalf Of GALE STEWARD
Sent: 2003 October 28 Tuesday 08:28
To: towertalk reflector
Subject: Re: [TowerTalk] Re: What is the largest 20mtr monobander you
haveever seen?


Yeah it was big but it doesn't rotate! Wonder what the
biggest rotatable 20M yagi is/was.

73, Stew K3ND


--- W0UN -- John Brosnahan <shr at medinaec.com> wrote:
> If memory serves me, WA6ZZK's 20M Yagi on the cover
> of CQ Magazine
> was 13 elements with a 156 ft long boom.  My dream
> has been that someday
> I would build something just a little bit BIGGER!
> ;-)
>
> 73--John   W0UN
>
>
> At 10:14 PM 10/27/2003, Jan Erik Holm wrote:
> >The largest I4ve seen was WA6ZZK, think it was 11
> or 12 elements,
> >was on front page of CQ some 35 years ago, good
> greef I4m getting
> >old.
> >There are probably some 10 or 11 el Yagi4s out
> there but don4t
> >know where, would suspect that there are some big
> stuff in former
> >USSR that not too many know about.
> >
> >73 Jim SM2EKM
> _______________________________________________
>
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>
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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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