[time-nuts] Req: Decent GPS Antenna Active/PassiveRecommendation

J. L. Trantham jltran at att.net
Sun Sep 15 14:27:57 UTC 2013


John,

I, too, use one of those 26 dB antennas.  It's been mounted outside on the
corner of my workshop for several years with no problems.

Joe



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Robert Atkinson
Sent: Sunday, September 15, 2013 4:43 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Req: Decent GPS Antenna
Active/PassiveRecommendation

Hi John,
I use one of the 26dB active timing antenna like ebay item 271266449940 or
170889540720 but a quick look shows fluke.l is selling a 38dB one
300956651110 that might be good if you have a long antenna run. You don't
say what receiver(s) you have, but the Thunderbolt needs a gain antenna.
It's always best to put the gain at the antenna. On the subject of feeders,
while the systems are 50R impedance, it is common to use 75R cable TV or
satellite coax. It's cheaper and lower loss at 1.5GHz than common 50R cable.
The loss due to mismatch is less than the reduced line loss. Trimble
rcommend this approach.

HTH,
Robert G8RPI.









More information about the Time-nuts_lists.febo.com mailing list