[time-nuts] WTB: GPS Antenna Splitter

Luc Gaudin lgaudin at naelcom.com
Fri Oct 17 03:19:32 EDT 2014

You could find off the shelves units from www.gpssource.com MS22 or MS24.
For standard splitter www.instockwireless.com with the GPS200/201 and GPS400/401 are interesting.

-----Message d'origine-----
De : time-nuts [mailto:time-nuts-bounces at febo.com] De la part de Dave M
Envoyé : jeudi 16 octobre 2014 01:44
À : Discussion of precise time and frequency measurement
Objet : Re: [time-nuts] WTB: GPS Antenna Splitter

Pete, I see a ZAPD-30 on the miniCircuits web site.  Might those be the models that you have?
If so, (and assuming that you can find them), how much for a couple?

Dave M

Peter Loron wrote:
> Dave, I think I have a MiniCircuits ZAPD-3(?) splitter or two kicking 
> around. I'll try to get a look in the stash this weekend.
> -Pete
> On 2014-10-06 13:01, Dave M 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 expensive.
>> 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 the same antenna.  I would like to gather some 
>> data as to the differences between the two antennas.  I know I could 
>> switch the connections manually, but I like the idea of a switch to 
>> sort of automate the connections, and I'd need another splitter 
>> anyway.
>> Before I go to the trouble and expense of building upon this idea, 
>> are there 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 be aware of by putting both antennas so close together?  Will 
>> that small distance have a noticeable effect when switching a 
>> receiver from one antenna to the other?  Will the GPS notice the 
>> difference and want to do another survey?
>> Thanks for your comments.
>> Dave M

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