Re: [amsat-bb] Uk help needed!

["Vince R." <vincesr@xxxxxx>]

Bob,

I made my own boom from a  wooden "closet rod." I wound it over with
fiberglass 4" wide cloth from the marine supply. I used marine resin and
then finished with a gray tinted gel-coat. Wind two(or more) layers in
opposite
directions, overlapping turns about an inch. This forms a nice lightweight
composite structure that resists the crushing effect of the clamps. The
clamps also bite into the boom and they never slip. It is more rigid
than PVC or wood, but not as stiff as 0.125 wall aluminum tube. After
six years in Florida it has small checks in the gel coat but is still very
sound.
A spritz of epoxy paint would restore it to new... maybe when I tune up
The V/U yagis.

Some of the guys put wooden dowel rod inside of PVC. You need to
find the right size PVC and wooden dowel. I wasn't all that satisfied
with the result but it does work. It has to be TIGHT to get the best effect.

Hope this helps,
Vince Risalvato
KD7AI




----- Original Message -----
From: "Art Goldman" <aegoldm@lts.ncsc.mil>
To: "Bob Sayers" <bob.sayers@zetnet.co.uk>
Cc: <amsat-bb@AMSAT.Org>
Sent: Tuesday, March 27, 2001 3:11 PM
Subject: Re: [amsat-bb] Uk help needed!


> Bob:
>
> I have a Kenpro elevation rotator, and I'm pretty sure the maximum
> size boom it takes is U.S. 1-1/4 inches O.D. I'm using what we call
> schedule 40 PVC drain pipe. Works fine for the reflector grid antenna
> which is only about 5 Kg. I have one on each side of the rotator. One
> has the original feed assembly, the other has an AIDC 2733 with its
> integral dipole.
>
> 73,
> Art N3OY
>
> Bob Sayers wrote:
>
> > Hi, All;
> >
> > Is anyone in the UK using, as the horizontal boom with a Kenpro
> > elevation rotator, the reinforced fibreglass tubes currently being
> > advertised by UK retailers?
> >
> > I'd like to use the 1.75 inch diameter type, but it seems to be
> > very close indeed to the maximum diameter stated in the Kenpro
> > manual - a case of "will a 1.75 inch diameter pole fit in a 1.75
> > inch hole"?
> >
> > I'm reluctant to go down to the 1.5 inch diameter if this is
> > unnecessary, and can't find a dealer locally to whom I could
> > take the rotator to try it!
> >
> > regards,
> >
> > Bob, G8IYK
> >
> > ----
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>
> --
>  ---------
> Art Goldman
> Logicon Contractor
> NSA Laboratory for Telecommunications Sciences
> (301)688-1719
>
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
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