[time-nuts] Spring cleaning and antenna placement
Magnus Danielson
magnus at rubidium.dyndns.org
Mon Apr 13 15:04:12 UTC 2009
Fellow timenuts,
You know you are a time-nut when your spring cleanup dutines involves
getting onto the rooftop and clean your GPS antennas. In my case my dual
frequency antenna (really a survey antenna, a Novatel GPS 502 L1/L2) was
due to lack of patience temporarily put up there in a not so fixed
position, so that the wind shifter position and attitude as it slided
down the tiles that it was effectively useless, especially as it was
pointing mostly north into the big GPS hole and putting the antennas
nuling power towards most of the low-attitude sats. Let's just say that
I'm not too proud of that mounting... I know better, I know far
better... but I am impatient to play with the news toys, so I hope
people recognice the feeling.
My biggest problem is that I have a large TV antenna pole sitting ontop
of one of the chimneys. It is needed as the house is partly down a valey
to get a nice and clean TV signal. Fairly new also, as the old antennas
was broken.
I have got part of the gear to mount the GPS antennas on the other
chimney, but lack the proper antenna tubes.
My big L1 choke rings (AT575) can be mounted without the central tube
but I wish to use the combination of that and the three outer mounting
screws. I need to build a mounting platform for it anyway.
Besides, I think the way I pull cables and what cables I use could
improve. My RG 58 is certainly not optimum, but it is cheap, easily
available alongside connectors and suitable strip and crimp tools.
So... hints for tubes and other mounting aspects would be nice.
Cheers,
Magnus
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