[time-nuts] Trimble recommends RG-59 Antenna Cable.

Azelio Boriani azelio.boriani at screen.it
Mon Apr 30 20:01:27 UTC 2012


Yes, I use the regular satellite TV cable: low loss, easy to find and cheap.

On Mon, Apr 30, 2012 at 8:22 PM, Don Latham <djl at montana.com> wrote:

> My TrueTime gps rcvr uses rg-59 as well.
> Don
> Robert Atkinson
> > Hi Ken,
> > This is correct. Some other documents explain the rationale. Basically
> > for long runs the loss caused by the mismatch is less than
> > the higher loss per foot of 50R coax of a similar size. Even better than
> > RG59 is the high performance cable used for cable TV and satellite
> > installations. This is cheap and low loss at 1.5GHz. This also also
> > explains the F connector on the Thunderbolt. It would also be intersting
> > to measure the actual impedance of some GPS receivers and antennas.
> >
> > Robert G8RPI.
> >
> >
> > ________________________________
> > From: Ken Kubick <kenkubick at hotmail.com>
> > To: Time Nuts <time-nuts at febo.com>
> > Sent: Monday, 30 April 2012, 6:58
> > Subject: [time-nuts] Trimble recommends RG-59 Antenna Cable.
> >
> >
> > Hi Time-Nuts guys,  I was reading the Trimble Thunderbolt manual section
> > 2.1.3 (Antenna Cable).  Trimble recommends using RG-59 cable which is 75
> > ohm coax.  Is this a typo or is this correct?  I thought that the
> > Trimble Thunderbolt would use a 50 ohm cable and antenna.
> >
> > Thankyou
> >
> > Ken Kubick
> >
> > kenkubick at hotmail.com
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>
>
> --
> "Neither the voice of authority nor the weight of reason and argument
> are as significant as experiment, for thence comes quiet to the mind."
> R. Bacon
> "If you don't know what it is, don't poke it."
> Ghost in the Shell
>
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLP
> 17850 Six Mile Road
> POB 134
> Huson, MT, 59846
> VOX 406-626-4304
> www.lightningforensics.com
> www.sixmilesystems.com
>
>
>
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