[amsat-bb] Re: Cheap LEO antennas
Tue Aug 15 19:01:55 PDT 2006
Joe Kononchik wrote:
> Does anyone know if PVC (Schedule 40) can be used as a substitute for wood?
> Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
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The white stuff can tend to get brittle out in the sun. Painting it will
help with this somewhat. My 70cm antenna was modeled after the cheap
yagi design and had a white PVC boom that had been painted gray. When
lowering the mast to do some rotator maintenance the antenna brushed a
nearby dogwood tree that the XYL refuses to let me cut down. The boom
snapped right at one of the elements. This could have been brittleness
or just the fact of where it struck.
I can't comment on the tan (CPVC) pipe as I haven't used it. My
replacement antenna will be using schedule 80 which is gray in color and
much more rigid for the boom.
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