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[TowerTalk] Rohn HDBX Tower - Boom Length

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Subject: [TowerTalk] Rohn HDBX Tower - Boom Length
From: (
Date: Tue, 3 Feb 1998 12:45:14 EST
In a message dated 98-02-03 08:40:26 EST, writes:

<<     While on BX tower, the HDBX is supposed to take 18 square feet with a
 maximum boom length of 10 feet.  What kind of a ham antenna has those
 specifications (other than a dish)?  But Rohn lists them in their "Ham
 Catalog" and several well known ham dealers advertise them in QST and other
 magazines, obviously saying they are intended for ham use.  What "ham use"
 is consistent with the 18 square foot and 10 foot boom specifications?

Funny that Stan should comment on this anomoly.  I am considering the erection
of a 48-foot HDBX tower.  In its self-supporting configuration, it is indeed
supposed to take 18 square feet of antenna with maximum boom length of 10
feet.  I would like to put up a Force 12 C-4XL (9.6 square feet, 30 foot boom)
or, second choice, a C-4SXL (8.4 square feet, 23 foot boom).  The square
footage doesn't seem to be an issue, but the boom length of either antenna is
of concern.

As Stan comments, the value of this reflector is in gathering empirical
evidence.  So I seek specific examples of what antennas any of you have put on
an HDBX tower (square footage and boom length), what wind speeds have been
experienced, and how the tower stood up under those conditions.


Phil, N6ZZ

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