[time-nuts] GPS antenna in attic?

Chris Wilson chris at chriswilson.tv
Mon Nov 26 09:01:03 UTC 2012



> 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



26/11/2012 08:56

I get a piece of fairly thin aluminium sheet and bend it so it slips
under one roof slate, up towards the ridge, and it has another small
downturn to hook over the top edge of the tile below, to stop the
ali sheet slipping down and out. The exposed edge of the sheet is bent so
it's horizontal. I mount the sensor on the horizontal bit, and the
lead goes through a gap between the tiles, or under a tile. The lead
is thin enough for this. No drilling, no potential water leaks. I have
mine alongside a skylight (Velux window) so I just reached through to
install it.

-- 
       Best Regards,
                   Chris Wilson.




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