[time-nuts] Comparing PPS from 2 GPS units

Hal Murray hmurray at megapathdsl.net
Tue Dec 18 05:40:33 UTC 2012

jimlux at earthlink.net said:
> You mean RG65 http://www.awcwire.com/ProductSpec.aspx?id=M17/
> 34-RG65-Coaxial-Cable or RG186 http://www.awcwire.com/ProductSpec.aspx?id=RG1
> 86-Coaxial-Cable 

Interesting stuff.  Thanks.

RG-65 says no longer available.  It also says:
  Coaxial Delay Line 0.15 uSec/ft
(Am I having troubles counting zeros, or is that seriously slow?)
  Nom. Imp.  	950
  Vel. of Prop.  	2 (no units)
  Cond. Material  	Magnet Wire Helix
(What is "magnet wire", and what does "helix" mean and how does it effect 

RG186 says:
  Shield Material  	Magnet Wire   [What does that mean?]
  Nom. Imp.  	1000

The cable on scope probes (at least fancy ones) has a tiny conductor.  I 
think that translates into high impedance.

These are my opinions.  I hate spam.

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