[time-nuts] ThunderBolt question

[Didier Juges]

Even more so when the cable is long, as it is likely to be with a GPS
receiver. The cable attenuation does wonders attenuating the effects of
VSWR...

Didier KO4BB

On Fri, Jun 5, 2020 at 6:30 PM Tim Shoppa <tshoppa at gmail.com> wrote:

> Many of us use F connectors and 75 ohm CATV RG-6 coax for GPS antennas when
> both antenna and receiver are specified for 50 ohms.
>
> Don't sweat the difference between 75 and 50 ohms.
>
> Tim N3QE
>
> On Fri, Jun 5, 2020 at 7:22 PM Robert DiRosario <ka3zyx at comcast.net>
> wrote:
>
> > I have a Trimble ThunderBolt GPSDO that I just received. It has an F
> > connector for the antenna input, and BNC connectors for the 1 pps and 10
> > MHz outputs. Is the receiver input impedance really 75 Ohms, or is it 50
> > Ohms and they just used the F connector to distinguish it from the
> > others? What do people do, just use a 50 Ohm antenna?
> >
> > Thanks
> >
> > Robert DiRosario
> >
> > KA3ZYX
> >
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