[time-nuts] Voltage on antennas

Ed Palmer ed_palmer at sasktel.net
Wed Mar 13 19:36:07 EDT 2013

On 3/13/2013 5:19 PM, Mike S wrote:
> On 3/13/2013 6:40 PM, lstoskopf at cox.net wrote:
>> Some of the little magnetic attached antennas on eBay will operate on
>> 3-5V.  More problematic is using the older antennas which require 5V
>> with the newer chips such as the LEA-5,6,7 series which run on 3.3V.
> Some distribution amps will all you to inject the voltage you need. I 
> have an HP 58516A (an inexpensive eBay purchase) which passes the 
> voltage from port 1 to the antenna. That also powers the amp. So, I 
> put clean 5 V into port 1, and connect GPS receivers to the other 3.

You can also put a 5-volt GPS on port 1 to match your 5-volt antenna and 
GPSs with other voltages, e.g. 3.3 or even 12 volts, on the other 
ports.  This way, you don't lose the use of one port.


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