[Drake] R4B/T4XB Cables

[Garey Barrell]

Niel -


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 TOTAL, including connectors = .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.

Most any cable will work,  _IF_  the INJ trimmers are adjusted with the
units cabled together.

73, Garey - K4OAH
Atlanta

Drake 2-B, 4-B & C-Line Service Data
<http://www.k4oah.com>


Niel Wiegand wrote:
> Is there a source for the transceive cables between the R4B and T4XB?
>
> If not a source for the cables, what type/length of coax do I need to 
> shop for?
>
> Tnx,
> Niel - W0VLZ
>