[TowerTalk] Vertical insulated base material question

[Patrick Greenlee]

Until or unless a knowledgeable expert with hands-on experience could 
persuade me I would not do it.  You can buy insulators off the shelf 
from various sources.  I have a 52 ft vertical on a home brew base that 
uses 3 insulators from Hy-Gain.  The antenna is a Hy-Gain Hy-Tower and 
is made to be free standing and mount on a cubic yard of concrete.  I 
built a custom mount and mounted it without concrete on top of a metal 
barn. You can buy the insulators  as replacement parts.  If you want 
stronger then use more than 3 insulators.

The Hy-Gain Hy-Tower is a triangular lattice tower for the first 24 ft 
and then is telescoping aluminum tubes the rest of the way up.  Check 
out the wind loads and your mast is likely less of a wind load than mine.

Patrick        NJ5G


On 2/7/2017 3:31 PM, RLVZ--- via TowerTalk wrote:
> Hi Guys,
>   
> I'm building an 80m. 1/4 Vertical using a tapered Aluminum 32' tower  at
> the base and telescoping aluminum tubing on the top to achieve a 67'  length.
> It will be lightweight and probably self-supporting up  to 40-50mph but for
> safety I'll guy the tower at the 30' level with  non-conductive guy lines.
>   
> I'd like this to be an "insulated base" tower and am wondering if I could
> attach the base of the tower to treated 4"x4" wooden posts in cement and
> achieve  sufficient RF insulation from ground?  I plan to use stainless steel
> bolts to attach the base of the tower to the 4" treated wooden posts.
> Please advise if you have any first hand experience using wood or treated wood
> as the insulated base of a Vertical?  Or if no first hand experience, do
> you believe wood will give adequate RF isolation from earth?
>   
> Thanks & 73,
>   
> Dick- K9OM
>   
>   
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