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Re: [TowerTalk] Rebuilding the TH7

To: <>
Subject: Re: [TowerTalk] Rebuilding the TH7
From: "k6xyz" <>
Date: Mon, 4 Feb 2008 20:44:00 -0600
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By the way....I had a need last month to order a bunch of parts from MFJ for
an ice damaged Hy-Gain antenna. 
Don't order parts on the internet....get the part numbers of what you need
from the internet and then call and place the order personally with Tom
He knows the antenna products very well.
I got those parts 2 days later. 
This was the second time that I have ordered parts from them and I have been
more than satisfied with their customer service.

However.....over time, design specs of parts can change so explain to Tom
what you have and let him determine if the new parts are compatible.
Most likely they will be.

Case in point is the Hy-Tower......
There have been several companies make the 'Rohn' tower sections that are
used in the 
Hy-Tower. Each time the tower specs change a little causing a re-design of
certain parts that never get re-designed.
BUT.....they will work....they just don't fit like the manual says they

The material selection is excellent and in some respects is a needed and
welcome improvement from years gone by.

If anyone is interested in installing the Ht-Tower, I can help you out with
your questions and what to look for.


Dave Harmon
Sperry, Ok.

-----Original Message-----
[] On Behalf Of Dennis W0JX
Sent: Monday, February 04, 2008 8:19 PM
Subject: [TowerTalk] Rebuilding the TH7

The TH7 is certainly worth rebuilding. It is in current production by MFJ
and the parts are available if you need them. See the following link:
  I have a TH6DX, the predecessor, still in operation after 30 years. It has
been in five different locations and each time I moved, I just polished the
elements with Scotchbrite or steel wool, replaced hardware with stainless
steel when I could get it locally, and bought a new set of trap caps. Have
never had to clean out the traps although they should be checked for loose
connections and the dirt blown out. Some people use Scotch 33 to tape the
caps on (the wind can blow them loose.)
  Might be worthwhile to spray certain parts with Krlylon clear acrylic,
depending upon your climate. I would not coat the traps or end caps as that
might alter the resonant frequency of the traps. 
  Overall, it is a great and rugged antenna worth keeping. Not the latest
and greatest as far as gain but still very competitive at 60 feet and
higher. My TH6 is at 80 feet and is actually a little too high for 15 and
  73, Dennis W0JX/8

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