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_steinm...@lavabit.com> To: Discussion of precise time and frequency measurement <time-nuts@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 _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
