[time-nuts] GPSDO module connections

David McGaw n1hac at dartmouth.edu
Mon Mar 3 14:27:11 EST 2014

RG-59 cable is fine but soldering wires is not a good idea for 1.6GHz.  
Use a panel-mount BNC crimp connector made for RG-59 such as the 
Amphenol 31-343-RFX.  I presume you want to use regular 50 ohm BNC types 
rather than the 75 ohm variant.

It is preferred to use coax for the 1 PPS as any reflections will 
degrade its risetime.

Good luck,


On 3/3/14 1:01 PM, d0ct0r wrote:
> Hello,
> I am looking for the advise: what will be the better method to connect 
> GPSDO module by short extension cable to put its antenna input on 
> front or back panel ?
> Lets say, GPSDO module has female “F” connector. And I would like to 
> have BNC connector on back panel of my project. Manufacturer of GPSDO 
> recommend to use RG-59 cable for antenna connection.
> Is it OK if I'll take some RG-59 from CCTV, cut 6" or 12" of it, 
> connect one end to GPSDO (let say this cable has compression type 
> connector) and solder other end to BNC on the panel ? Or its better to 
> use adapters and no soldering ? Like "F connector-to-BNC" adapter , 
> then short BNC-to-BNC cable connected to BNC panel connector ?
> And other question: is it worth to use RF cable to connect 1PPS output 
> from GPSDO to distribution amplifier ? Or regular AWG-22 could do that 
> job ? Thanks !

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