[TowerTalk] Amount of "Goop" to use in Telescoping Aluminum Tubing Connections?

john at kk9a.com john at kk9a.com
Tue May 22 22:01:50 EDT 2018

Using a glove is a good idea as some of these products can be tough to wash
out of the indentations in your hands.  That said, I use Penetrox which has
zinc dust, and I apply it with my bare hand trying to wipe it reasonably
thin. I guess I go be feel which is hard to quantify.

I know that Rich is very aware of this but since he mentioned Jet Lube
SS-30, I would avoid using materials far apart on the anodic index chart in
a corrosive environment.

John KK9A

Bob Shohet, KQ2M wrote: 

Hi Rich,

You want just enough of a thin film to provide lubrication and to prevent
corrosion/oxidation - no more lest you partially or completely insulate one
section of the telescoping tubing from the other.  (I put too much one time
and had to take the antenna down to wipe it off because the swr and
bandwidth was way off!)

NOW what I do is as follows:

I put on a pair of large nitrile gloves ($20 for a box of 400 at Costco) and
put about 1/2" of  Noalox on one glove and then grasp the tubing and smear
it on with my hand in a circular motion up and down a few times for about 3'
on the element.  (I know it reads like something obscene but it is not.

Then I take a paper towel and gently grasp the tubing and wipe off and go up
and down and the paper towel takes most of it off and leaves a thin
continuous film all the way around the element.

Since I adopted that method, I have never put too much on nor have I had a
problem taking apart an element years later.

The best part is that you do not get any goop on your hands or hands - clean
up is really easy - you just throw the gloves and the paper towels in the
garbage and you are done!


Bob KQ2M

From: Richard Smith 
Sent: Tuesday, May 22, 2018 8:04 PM
To: towertalk at contesting.com 
Subject: [TowerTalk] Amount of "Goop" to use in Telescoping Aluminum Tubing

"Goop" = Penetrox, Noalox, Jet-Lube SS-30, or other

A while back, there was a good discussion on this reflector of which goop is
recommended for telescoping aluminum tubing connections in antennas. My
question here is not intended to recap all of the "Which Goop is Better"
points, but rather to ask how much goop to use. Over the years, I have heard
recommendations from "very minimal" to "lots". 

I would be interested in recommendations from this very experienced group.
The trade-offs in my mind are:
Very minimal amount: Pros: Allows the aluminum to aluminum contact to
provide the electrical connection. The goop provides some lubrication, maybe
some corrosion protection.                                   Cons: Not
enough corrosion protection, not much help in separating telescoping parts
when desired years later.
Lots of Goop:           Pros:  Assists in making a good electrical
connection, provides more corrosion protection, easier to separate parts
when desired years later
                                Cons:  Maybe too much lubrication, harder to
get hose clamps tight enough to prevent unwanted slippage.
Maybe this is very basic, but I am interested in your comments.

Thanks in advance,
73, Rich, N6KT

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