[time-nuts] Freestanding mast

Stanley Reynolds stanley_reynolds at yahoo.com
Fri Sep 3 01:39:57 UTC 2010


Picked that one as it fit the 3" wide request and is UPS shippable. The brackets 
and ground plate were also available.

Stanley



----- Original Message ----
From: J. Forster <jfor at quik.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Thu, September 2, 2010 8:25:35 PM
Subject: Re: [time-nuts] Freestanding mast

I was just about to suggest a ham antenna tower. The triangular truss
design is very rigid, yet presents low wind loading. I think there are
application notes that help with siting and selection.

Rohn is a very standard and pretty well respected name in the business.
They also have a good selection of accessories. In this area, I see them
at ham fleas on a regular basis.

FWIW,

-John

===============


> ROHN 9H50 34 Foot Telescopic TV Wireless Antenna Push Up Mast
>
> http://www.3starinc.com/rohn_telescopic_masts.html
>
> I don't know this vendor just the first that came up in google.
>
> Stanley
>
>
>  
>
>
> ----- Original Message ----
> From: Charles P. Steinmetz <charles_steinmetz at lavabit.com>
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Sent: Thu, September 2, 2010 7:46:00 PM
> Subject: [time-nuts] Freestanding mast
>
> I'm curious what the best freestanding mast is for a timing antenna (think
> Lucent timing antenna or marine "mushroom" GPS antenna -- light and pretty
> small).  The mast would have its highest support at rooftop or chimney-top
> level, and could extend from there as far downward as the ground with
> additional
> supports as required.  Should be able to survive at least Category 2 winds
> and
> heavy snow and ice.
>
> What reasonably available mast material no more than, say, 3" in maximum
> cross-section would allow the most vertical extension above the highest
> support,
> and how much extension would that be?  I'm thinking 10 feet of 2" or so
> thin-wall steel tube may be OK, but beyond that I don't know.  Tubing is
> probably not the optimum shape, but I assume the availability of other
> engineering shapes (say, "+" cross-section) is likely to be limited.
>
> Ideas?
>
> Thanks,
>
> Charles
>
>
>
>
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