[time-nuts] WTB: GPS Antenna Splitter
brooke at pacific.net
Tue Oct 7 01:22:16 EDT 2014
This works great and has minimal cost.
John C. Westmoreland, P.E. wrote:
> Can you please let us know what you go with for your splitter choice?
> I noticed companies like EndRun Technologies use ones from these folks:
> TESSCO might stock those if you ask them.
> John W.
> On Mon, Oct 6, 2014 at 6:09 PM, Bob Camp <kb8tq at n1k.org> wrote:
>> Missed the survey question…
>> If a ns in free air is about 1 foot (30 cm), then you probably want a
>> survey that is better than 6” to keep the error down. You do not want to
>> have the antennas on top of each other, so yes, the GPS will need a survey
>> / location each time you change antennas. If you go with the 10’ spacing,
>> then you will get some pretty big jumps without switching the location.
>> On Oct 6, 2014, at 4:01 PM, Dave M <dgminala at mediacombb.net> wrote:
>>> Does anyone in the group have, or can point me to, a low-cost (but not
>>> cheap) 2-port splitter for a GPS antenna? Those on Ebay are rather
>>> I have two GPSDO units, and have both an older timing antenna and a new
>>> choke ring antenna (Thanks, Pete L). I already have one 2-port splitter
>>> (working well), but my intent is to connect both antennas through the
>>> splitters and a couple coaxial relays so that I can, with the twist of a
>>> switch, allow me to run each GPS from a different antenna, or both from
>>> same antenna. I would like to gather some data as to the differences
>>> between the two antennas. I know I could switch the connections
>>> but I like the idea of a switch to sort of automate the connections, and
>>> need another splitter anyway.
>>> Before I go to the trouble and expense of building upon this idea, are
>>> any comments as to the value of the project?
>>> Some questions come to mind:
>>> I'm thinking about mounting both antennas on the same mast, at the same
>>> elevation, just separated by a couple feet. Any problems that I should
>>> aware of by putting both antennas so close together? Will that small
>>> distance have a noticeable effect when switching a receiver from one
>>> to the other? Will the GPS notice the difference and want to do another
>>> Thanks for your comments.
>>> Dave M
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