[time-nuts] FASTTRAX GPS Antenna power

Bob Stewart bob at evoria.net
Fri Jul 11 01:02:49 EDT 2014

I'm a bit confused about what you're asking.  You discuss antennas but you show pictures of a GPS receiver.  They're not the same thing.  I use a puck antenna.  They cost about $6 on ebay, and take their power from the coax.  Normally your GPS receiver supplies power to the coax, so you don't have to do anything special, other than don't short it out.


 From: jim s <jwsmail at jwsss.com>
To: time-nuts at febo.com 
Sent: Thursday, July 10, 2014 11:49 PM
Subject: [time-nuts] FASTTRAX GPS Antenna power

I disobeyed the group suggestions about antennas, and bought one of the 
one which needs power.

I had asked whether I should apply 5 volts to the.

tom posted on his fine info page a pinout, which I'm going to use.

Pin 1 is 3-5.5VDC Antenna power input.
Pin 2 is Prime Power input
pin 4 is Backup Power input.
Pin 8 is GND

I am going to apply 3.3 to 1,2, and 4.  Just wanted to get an opinion 
before trying it.

I'm curious if somehow the suggested Primary and Backup power was all 
that was needed, or how you guys were getting your GPS signals in.  Are 
your antennas not powered?



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