Hey Skipp! A couple of thoughts… Why do you need an amplified antenna in a high and open spot, unless the coax run is longer than about 40’? Is it practical to move one of the existing antennas away from the current location as a test to see if it’s a failure vs overload? Assuming it is physically practical to do so, of course.
From Tom Holmes, N8ZM > On Jul 11, 2022, at 8:49 AM, skipp Isaham via time-nuts > <time-nuts@lists.febo.com> wrote: > > Hello to the Group, > > I'd like to get some opinions and war stories regarding GPS reliability at > high RF level and elevation locations. > > Background: Three different hill-top GPS receivers, all different types, > using > different antennas mounted on an outside fixiture, plain view of the open > sky, > all stopped working. > > Test antennas were brought in and placed on a fixture well away from the > original antennas, the recevers went back in to capture and lock. > > From what I understand, the original antennas are what I would call straight > preamp with no pre-selection / filtering. > > The ordered and now inbound replacements are said to contain a SAW filter > system. It is the intent of the client to just place these "improved > antennas" in > to service and get on with life. > > I would suspect a GPS antenna (and receiver) could be subject to RF overload > or blocking, however, we're assuming nothing major has changed at the site, > nor > any nearby location. One might think there are more GPS receivers being > pushed > out of reliable operation by the world around them, I'm just not hearing > those stories > from a lot of people using them (GPS receivers). > > Any new install GPS receiver antenna ordered will/should contain some > pre-selection > to potentially avoid a problem, even some years down the road? Seems like > that's > where things are going... no more off the shelf, wide band, (hot) > preamplified GPS antennas > in busy locations? > > Thank you in advance for any related comments and/or opions ... > > cheers, > > skipp > > skipp025 at jah who dot calm > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-le...@lists.febo.com _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-le...@lists.febo.com
