About 15 years ago I made a 220 mhz 8 element yagi out of a 10 foot piece of
the gray electrical plastic type conduit. It is still at the top of my
tower.. It is suspose to resist the UV from the sun beter than the normal
PVC water pipe.

Did you have to support the ends of the conduit (e.g. a wire from the
tower top) at all? I've heard/read that the PVC conduits can tend to
droop progressively with time - any sign of that in your antenna?


--
Dave Platt AE6EO
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"Dave Platt" wrote in message
...
About 15 years ago I made a 220 mhz 8 element yagi out of a 10 foot piece
of
the gray electrical plastic type conduit. It is still at the top of my
tower.. It is suspose to resist the UV from the sun beter than the normal
PVC water pipe.

Did you have to support the ends of the conduit (e.g. a wire from the
tower top) at all? I've heard/read that the PVC conduits can tend to
droop progressively with time - any sign of that in your antenna?

The plastic conduit is about 10 feet long and the elements are for 220 mhz
made out of stainless steel 1/8 inch welding rod. The driven and reflectors
are the quagi design. Eight elements total as in one of the ARRL handbooks.
The diameter is about one inch conduit size . That makes it about 1.5
inches or more outside diameter. There is a slight droop but not very much.
There is no support other than the way I mounted it in the middle to the
mast.