[TowerTalk] caps for Rohn 25 top section

[Kenneth D. Grimm]

Ed Sleight wrote:

> For the caps on mind, I use that "self expanding foam insulation from
> Home depot. Seems weatherproof and will expand to fit almost any hole.
>
> Use it also to seal off boom ends ( so far 4" is the largest ) and
> elements.

Several years ago I put up a christmas tree of Wilson 4 element yagis
for 10, 15 and 20 meters.  Wilson provided some neat poly/rubber caps to
fit over the ends of the elements and some big ones to cover the ends of
the booms.  When the antennas came down, I was very surprised to
discover that two of the booms had filled with water and during a hard
freeze had actually been split for an inch or so in a couple of spots!

Since that experience, I have been content to leave both element and
boom ends open.  The potential added weight from the occasional wasp
nest is far "outweighed" by a boom full of water!

73,
Ken K4XL
grimm@alison.sbc.edu



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