I agree with Gene (a sturdy name, BTW) in that you ought to use
Penetrox or similar material when joining the various taper sections.
However, let me add a bit to it:
o Use Scotchbrite pads and not steel wool to clean the surfaces. The
steel wool will leave bits of - steel - on the aluminum surface which could
corrode (dissimlar metals in contact) over the years and reduce the
conductivity of the joint.
o Don't lather the Penetrox on the joint. Use one Scotchbrite pad to
clean the surfaces and another clean pad to apply a thin coating onto the
materials. Once you assemble the joints there should be no oozing of
Penetrox from within. If there is, wipe it off and use the second
Scotchbrite pad again, this time without adding more Penetrox.
Gene Smar AD3F
----- Original Message -----
From: "Gene Fuller" <firstname.lastname@example.org>
To: "Tommy" <email@example.com>; <firstname.lastname@example.org>
Sent: Tuesday, December 08, 2009 10:39 AM
Subject: Re: [TowerTalk] Taper element sections
> Hi Tom -
> I would highly recommend the use of Penetrox (or similat). I've used it
> several decades and find that it seems to hold up forever. Besides the
> conductivity issue, close fits in the tubing can become difficult to take
> apart with a few years of aluminum oxide buildup. Clean with steel wool
> until bright and shiny, then apply a thin coat of the penetrox. Also
> recommended for any electrical/RF connedtions e.g feeding the driven
> element, if you have a tribander, inside the traps, and center pin and
> threads on coas connectors.
> Gene / W2LU
> ----- Original Message -----
> From: "Tommy" <email@example.com>
> To: <firstname.lastname@example.org>
> Sent: Tuesday, December 08, 2009 9:13 AM
> Subject: [TowerTalk] Taper element sections
>> Yes, I am a newbie! When assembling a yagi, is it customary (or correct)
>> apply Penetrox A to tapered element joints? Or does it really matter?
>> Tom - W4BQF
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