From: Garey Barrell 
Subject: Re: [drakelist] Drake cables


Garey Barrell  made an utterence to the drakelist gang
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Jason -

The original Drake supplied cables were all standard "microphone"
shielded wire, with the exception of the "INJ" cable.  All but the INJ
cable were similar to what is used in audio patch cables today.

All cables were 38" long tip-to-tip.

The INJ cable used a foam inner dielectric and phono connectors with a
white insulation.  This cable measures 60 pF total capacity.

All other cables used the standard for the day clear polyethelene inner
dielectric and phenolic (brown) insulated phono connectors and measures
~100 pF.

Original Drake INJ Cable = 19 pF/ft = .160" o.d. (foam poly)

RG-62 = 93R = 13.5 pF/ft = 0.240" o.d.
RG-59 = 75R = 14.8 pF/ft = 0.242" o.d.
RG-6 = 75R = 16.2 pF/ft = 0.270" o.d.
RG-174= 50R = 30.8 pF/ft = 0.110" o.d.
Mic Cable (Belden 8410) = Hi-Z = 33 pf/ft = 0.160" o.d. (foam poly)
Mic Cable (Belden 8421) = Hi-Z = 16 pf/ft = 0.180" o.d. (foam poly)
R/S Audio Patch Cable = 28 pF/ft = 0.165" o.d. (poly)

The best choice is the Belden 8421 Audio cable from their "Brilliance"
line.  It looks just like the other cables, and is very flexible.  The
RG-62 is OK, but it is 50% larger and far less flexible.  RG-62 is also
prone to shorting if bent over too small a radius.  The only pertinent
factor is the total capacity, impedance and "loss" are not important.

Actually the standard R/S audio patch cable will work ok in the INJ role
as long as the Injection alignment is done with the R-4 and T-4X cabled
together.

73, Garey - K4OAH
Atlanta


Jason Buchanan wrote:

>
> Jason Buchanan  made an utterence to the drakelist gang
> ----------------------------------------------------------------------
>
> Anyone know where to get good RCA phono cables for the 
> inter-connections between R-4B and T-4XB?  I got a generous 
> performance increase by using the original Drake cables that I have - 
> unfortunately the ones I have work only when twisted in a certain 
> shape and that's not a way to run a railroad.  I'd prefer to get the 
> real thing or equivalent.
>
> 73 Jason N1SU

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