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[TowerTalk] Mast needed in Detroit/Chicago area

To: <>
Subject: [TowerTalk] Mast needed in Detroit/Chicago area
From: (
Date: Thu, 10 Jan 2002 11:00:44 EST
In a message dated 1/10/02 6:43:00 AM Pacific Standard Time, writes:

> I am in need of a top quality mast for a tower installation.  I purchased 
>  the tower from the widow of a SK.  He only had a short (approx 10 foot) 
>  mast on the Tower, yet it has a full mast raising fixture installed.  I 
>  would like to replace this mast with a 20 foot long Chrom-Moly or similar.

    First things first. Why do you think you need a chromoly mast ($$$)? Most 
hams who think they need chromoly really don't need to spend that much money 
for a mast. 

    What's your county windspeed rating? What's your proposed antenna 
installation? What kind of tower is it?
>  Anyone out there know of a steel tubing dealer in the Detroit area, or as 
>  second choice Chicago area.  I live 110 miles north of Detroit and would 
>  like to keep my shipping costs down.
>  An additional question, how do I communicate the Ham language of a 2" 
>  1/4" wall Chrom-Moly mast (or whatever the next step down would be) into 
>  the professional language that these tubing manufacturers use?  I called a 
>  local dealer and we could barely understand each other.  He kept wanting 
>  know the application that the tubing would be used for yet he had no idea 
>  what I was talking about when I described the application.
    Hmm, what you want to buy is tubing with the necessary yield strength for 
your application - I don't know why the person you were talking to didn't get 
the picture (Maybe he/she didn't know much. They didn't know what a 2" OD 
1/4" wall chromoly mast was? I'd talk to someone else that knows what they're 
talking about.). My MARC (Mast, Antenna, and Rotator Calculator) program does 
mast calcs and gives you the needed yield strength required (available from  
<A HREF="";></A>). Typical 
ham HF stacks and moderate winds up to 80MPH or so will require something 
like 60,000 psi yield strength which corresponds to an SAE 1026 or 1027 
carbon alloy steel which most tubing suppliers seem to stock.  

Steve    K7LXC
Tower Tech 

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