[time-nuts] Freestanding mast

[Rob Kimberley]

Just a thought, as you are in southern hemisphere, wouldn't you see more
birds facing North?

Rob K

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at 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_steinmetz at 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
>
>
>
>
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-- 
Steve Rooke - ZL3TUV & G8KVD
The only reason for time is so that everything doesn't happen at once.
- Einstein

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