[TowerTalk] Mast material

[VeeAthreePL at CUIC . CA]

Try and ask steel dealer for tube/pipe made of 4130 material
Andy - va3pl

----- Original Message -----
From: <K7LXC at aol.com>
To: <ab2os at att.net>; <towertalk at contesting.com>
Sent: Wednesday, May 26, 2004 10:26 PM
Subject: Re: [TowerTalk] Mast material


> In a message dated 5/26/04 7:14:29 PM Pacific Daylight Time, ab2os at att.net
> writes:
>
> > The chrome-moly tube that is sold specifically for masts is horrendously
> >  expensive,
>
>     Yes, it's an investment-quality piece of steel but if it's what you
need,
> you gotta have it. My own experience is that most guys that buy chromoly
> really don't need it. I've   bought some steel alloy tubing that's 74% as
strong
> (good for about 90% of the applications out there) as 115kpsi chromoly and
> costs half as much.
>
> >  and one of the hams around here decided to use well-casing,
> >  which was far cheaper. Was that a false ecomomy?
>
>     Isn't well casing just another pipe to carry liquids? They're heavy
and
> not strong basically. What is the yield strength of the well casing and
what
> sort of load is it carrying? Maybe he just didn't need much of a mast.
>
> >  What do I really need
> >  to support a 3-el. SteppIR (the other guy had a lot more antenna than
> >  that on his well casing) less than 10ft. above the top of the tower?
>
>     A 3L SteppIR is a pretty small antenna but without knowing your county
> windspeed rating it'd be hard to say. Your rating is available on  <A
> HREF="http://www.championradio.com">www.championradio.com</A> under Tech
Notes if you
> don't know.
>
> Cheers,
> Steve     K7LXC
> Champion Radio Products
> 888-833-3104
> _______________________________________________
>
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