My main GPS receiver used to see four to six satellites at a time when I
used an antenna near a window in my workshop in a singe story house. I moved
the antenna up into the attic near the peak, added 25 feet of TV cable, did
not add any amplification, and now my system acquires and tracks eight to
twelve satellites at a time. I did not want to move the antenna outside in
order to reduce the chance of roof leaks and to avoid having to provide
lightning strike protection. We do not get much, if any snow, and I have not
noticed any problems with rain.
John WA4WDL
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From: "Peter Gottlieb" <[email protected]>
Sent: Sunday, November 25, 2012 11:50 AM
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Subject: [time-nuts] GPS antenna in attic?
I'm beginning to set up in my new house and planning where all my various
antennas are going to go. Being a wood frame building, I was wondering if
it was sufficient to simply mount my Thunderbolt GPS antenna high in the
attic. It would be convenient as there is already a high quality CATV
line running from there to my lab area that I'm not going to use and the
Thunderbolt antenna system is 75 ohms. Will I have much attenuation going
through an asphalt shingle roof? What if it is wet? Or has some snow on
it? Another advantage for me would be I could mount that antenna on the
opposite end of the house from where I will have VHF and UHF transmitter
antennas.
Peter
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