Dan, W0VD;
See http://w4an.contesting.com/80.htm for photos of Bill's Rohn
25G/mast/Comtek 80m 4-square.
Many Comtek 80 meter 4-Square customers have used 24 feet of Rohn HDBX
tower sections supporting 2" tapered aluminum stingers successfully for
more than 7 years.
Since Rohn has discontinued this model, the Rohn 20/25G series will
probably become more popular in this type of installation.
Also see www.mgs4u.com/tower.htm for tower insulator information and
photos.
If you are not home brewing a unit, www.comteksystems.com will be your
last stop for a phasing coupler by the 4-Square expert company.
73-GL,
Jim Miller, K4SQR
http://www.comteksystems.com
4-Square Phasing, Stack Yagi
& Remote Antenna Switching Systems
On Wed, 10 Jan 2001 22:34:15 -0600 "dcbc" <dcbc@ipa.net> writes:
> Hello All
> I was told if I have any questions about towers and antennas to ask
> here on
> this reflector.
> I want to build a 80 meter 4 square array.
> I plan to build it out of Rhon 25 tower.
> I also have read that a elevated feed with elevated radials is
> better.
> So I plan to have the feed at 10 feet above ground.
> Which would be a better feed system to use an insulator or shunt
> feed the
> tower.
> If it is better to use a insulator. Then I am planing to use an
> Apl25g
> Accessory plate on the first section with a 12 X 12 X 1 1/2 inch
> thick piece
> of delrin as the insulator. on top of this the Bpc25g Concrete base
> plate as
> the upper plate for the rest of the tower to be built on.
> If shunt feed then I would attach the radials at the 10 foot level
> and build
> the tower as normal. Shunt feed has the advantage of lightning
> protection
> and tower is in 1 piece.
> Anyone out there built one of these arrays and have any thoughts on
> what I
> should do?
>
> Thanks
> Dan W0VD
>
>
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> Submissions: towertalk@contesting.com
> Administrative requests: towertalk-REQUEST@contesting.com
> Problems: owner-towertalk@contesting.com
>
Jim Miller, K4SQR
http://www.comteksystems.com
4-Square Phasing, Stack Yagi
& Remote Antenna Switching Systems
--
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
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