[time-nuts] Freestanding mast
Stanley Reynolds
stanley_reynolds at yahoo.com
Fri Sep 3 01:16:38 UTC 2010
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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