Re: [TowerTalk] Water pipe as a mast

["Richard (Rick) Karlquist" <richard@karlquist.com>]

The perfect shim is a piece of 2 inch "standard" aluminum irrigation 
pipe with 0.050 inch wall.  2 inch O.D. and 1.9 inch I.D.
I use it on my field day antenna which has
a water pipe mast.  I slit it lengthwise and apply it like a piston
ring with a gap the width of the saw blade  I clamp it with hose
clamps.  It now fits perfectly in the saddles on my 2 element SteppIR.

Rick

On 10/13/2012 10:32 AM, Jim W7RY wrote:
> Yup!
>
> You should have enough play "slop" in the bearing (or tube top) and
> rotor to be able to use 1-1/2 water pipe.  I used it for many years in
> Rohn 25 with a Tailtwiseter and both a TH6 and a 204BA mounted a foot
> above the tower. Worst case you may have to shim around the pipe with
> some flashing or other shim stock but very un-likely. Just Check it for
> binding by rotating it around a few times.
>
>
>
> 73
> Jim W7RY
>
>
>
>
> -----Original Message----- From: Jim Hoge
> Sent: Saturday, October 13, 2012 9:35 AM
> To: towertalk
> Subject: Re: [TowerTalk] Water pipe as a mast
>
> Dan,
>
> 1 1/2" nominal pipe will have an outside diameter of 1.9 inches. This is
> true for either schedule 40 or 80.
>
> 73,
> Jim W5QM
>
>
>
>
> ________________________________
> From: Dan Bookwalter <n8dcj@yahoo.com>
> To: Tower Talk <TowerTalk@contesting.com>
> Sent: Saturday, October 13, 2012 11:13 AM
> Subject: [TowerTalk] Water pipe as a mast
>
> I seem to have lost my mast pipe , and only have access to Homedepot ,
> Lowes and such , I am only going about 1 ft above the top of the tower
> so I figure heavy water pipe should work. Does anyone know what size is
> close to what fits in a Tailtwister ?
>
> Dan N8DCJ
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