On 5 September 2010 04:42, Rob Kimberley <r...@timing-consultants.com> wrote: > Just a thought, as you are in southern hemisphere, wouldn't you see more > birds facing North?
Oops! I really meant North. Well spotted that man. My satellite azimuth/elevation chart looks quite typical to text-book style. My GPSDOs still seem to be recovering from the long power outage caused by the earthquake here early Saturday morning but the stats seem to be settling down again. My timing gear and antenna were unaffected but it sure moved some of the heavy HP instruments that I have piled up on my workbench and demolished my computer "rack", but luckily everything seems to be working OK. The only thing that seems to be at fault is my broadband which is playing up now and I wonder if the telephone lines have been damaged in some way. Cheers, Steve > Rob K > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Steve Rooke > Sent: 03 September 2010 5:32 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Freestanding mast > > If your nearby houses and obstructions are not high, IE. if the houses there > are single story, you may be able to get away with what I have done. Instead > of fixing something on the house, I've attached a couple of antenna to the > top of one of my washing line poles in the garden as this faces South (I'm > in the Southern Hemisphere) and I get an average of 7-8 sats every day and > up to 12 at night. It makes any maintenance easy, if you get any snow it is > easy to clear at that height, there is much less windage if your subject to > strong winds and, if you don't use your washing line, the size of the poles > make them quite rigid so you don't suffer a lot of noise that you would high > up on a thin pole. > Just a thought. > > Steve > > On 3 September 2010 12:46, Charles P. Steinmetz > <charles_steinm...@lavabit.com> wrote: >> 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. >> > > > > -- > Steve Rooke - ZL3TUV & G8KVD > The only reason for time is so that everything doesn't happen at once. > - Einstein > > _______________________________________________ > 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. > -- Steve Rooke - ZL3TUV & G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein _______________________________________________ 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.
