[ntp:questions] Roof antenna, which one, would you bother?

Richard B. Gilbert rgilbert88 at comcast.net
Sat Mar 22 00:28:56 UTC 2014

On 1/3/2014 5:54 AM, Ralph Aichinger wrote:
> I am currently in the process of remodeling my house
> and a dedicated outdoor/roof mounted GPS antenna
> would be possible to mount without excessive cost.
> I probably would not see a huge difference for
> timing purposes, but what would your choice of
> an outdoor GPS antenna/receiver be? I am planning
> to put the NTP server (small Raspberry Pi, nothing
> fancy) into a rack maybe 10 metres of cable length away
> from the roof. Or would you move the NTP host itself
> to the attic and run Ethernet up?
> I suppose something like the Garmin GPS 17x (mast mount
> GPS with serial output and PPS, intended for the marine
> market) would work fine, also be robust enough and
> cheap on the used market.
> Would mounting just an antenna (active or passive) also
> make sense, or would cable loss be too high?
> What would *your* roof top setup be? Cost is of course
> an important consideration, on the other hand, 100
> or 200 Euros for the GPS, antenna and mounting hardware
> is probably OK. I would prefer to do cabling jobs now,
> while I am in the process of doing a lot of "dirty" things.
> Or would you not bother at all, and just put some puck into
> the window (which probably works too)?
> /ralph

I have a GPS Antenna sitting on on top of a rain gutter.  The gutter
is a "RainGuard" (TM).  I haven't had to clean my rain gutters since I
installed the RainGuard. About ten years! YMMV!!!

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