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

[Don Latham]

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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Dr. Don Latham AJ7LL
Six Mile Systems LLP
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