[ntp:questions] Re: Good GPS for attic?

clayj at nwlink.com clayj at nwlink.com
Fri Feb 11 19:20:35 UTC 2005

I'm using a Motorola Encore OEM Board that I picked up on E-Bay for $10,
with an external antenna for another $5, and the TAPR (www.tapr.org)
interface board (I forget how much that cost, but the whole mess was under
$100).   I've just got NMEA right now, but as soon as I figure out how to
put the pps hacks in the latest SUSE Linux kernel, I'll be doing that.

I think the key here would be to get a GPS, or at least an antenna that
you can mount externally, rather than in the attic.    I know that helped
me considerably.

Clay - N7QNM

> In article <01c5104a$fbc05f40$7551b80a at david-lee>, David Lee <dl at dl>
> wrote:
>>Jonathan Sturges wrote...
>>> I'm looking to use a GPS receiver as an inexpensive reference clock for
>>> an xntpd time server.  I'd like to leave the GPS in my attic for
>>> convenience and asthetics.
>>> A while back I bought a Radio Shack DigiTraveller GPS for this purpose.
>>>   It's ideal on almost all counts except that it can't keep a
>>> consistent
>>> lock from my attic.  It's close though (maybe if I could mount it above
>>> the insulation that would help).
>>> Can anyone recommend another inexpensive GPS that might be more
>>> sensitive?  I don't want fancy, just plain-jane with a serial port that
>>> can spit out NMEA strings for xntpd.  PPS would also be nice, but I'd
>>> be
>>> happy without it too.  (I'm mostly doing this to have a time reference
>>> for household computers, and also just the experience of setting this
>>> up.  Fantastic precision would be nice but certainly not required for
>>> this particular project.)
>>How about a re-radiating antenna on the roof feeding your existing GPS -
>>route the cable under a tile or under the eaves like a TV aerial lead.
> Can you recommend one and suggest a ball park price range?
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