I went through a similar search several years ago. Then I talked to a
local ham here who had an insulated vertical. He recommended buying
fiberglass rod about a 1/2" larger in diameter than the inner diameter
of the tower legs. Then just turn down about 8" or so of one end of
each on a lathe so it fits into each leg. You may have to turn down the
other ends too depending on what kind of mount you're using. Leave a
collar of the original diameter in the centers so that the legs and
mount butt up against it.
I've used this approach for a 107' vertical composed of a 60' Heights
aluminum tower, a 38.5' tubing stinger and an 8.5' CB whip for three
years now without any problems despite routine strong winds. at this
QTH. A steel tower may be more demanding, so I'd recommend getting the
opinion and/or calculations from someone qualified on this forum.
73, Joe
K2XX
On 7/31/2012 2:28 PM, Jim Hoge wrote:
> Greetings,
>
> Does anyone have a good source for tower or vertical base insulators? Used or
> surplus is ideal for a commercial type insulator. Larger diameter fiberglass
> rod (3'' or better) is another idea.
>
> Tnx es 73,
> Jim W5QM
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