You got it right Randy.
As far as possible dont r use metals with different expansion in a mecanical
assembly.
When one finds broken bolds on the feet of a tower, its time to inspect an
take care.
Different oxidized metals in electrical leads can form exellent diodes where
they are'nt wanted. Just ask those who worked with high Z inputs valves in
TV sets, and unstable grid polarization. Few knew where that came from.
Stories from the old Box hi.
Jos on4kj
----- Original Message -----
From: <ac7nj@donobi.net>
To: <kk9a@arrl.net>; <towertalk@contesting.com>
Sent: Friday, July 18, 2003 11:11 PM
Subject: RE: [TowerTalk] SS "U" bolts
> 1) Stainless steel and aluminum don't get along (galvanic corrosion)
> and the SS galls up the threads when over tightened. Galvanized
> hardware is by far superior.
> 2) SS is not strong just resistant to corrosion.
> 3) The best solution is same metals throughout, aluminum hardware
> will hold better and resist corrosion better than dissimilar metals
> particularly in a harsh environment.
>
> Randy
> AC7NJ
>
>
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of kk9a@arrl.net
> Sent: Friday, July 18, 2003 18:54
> To: TOWERTALK@contesting.com
> Subject: [TowerTalk] SS "U" bolts
>
> I am currently building several antennas which will be installed in
> a
> corrosive environment and I'm looking for bolts to clamp the boom to
> the
> mast. DX Engineering sells SS "U" bolts along with an aluminum
> saddle. I
> normally use 4 mast and 4 boom clamps when using 3/8 dia steel "U"
> bolts,
> however DX Engineering seems to recommend 8 boom and 5 mast clamps
> when
> using their 5/16 dia "U" bolts. I believe that stainless steel has
> less
> tensile strength than steel and also using a reduced diameter
> concerns me.
> Are there any better sources SS "U" bolts that fit 2 1/2" and 3"
> O.D.
> tubing. I'd also like to hear comments from anyone using the DX
> Engineering
> bolts.
>
> 73,
> John
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers",
> "Wireless Weather Stations", and lot's more. Call Toll Free,
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
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