Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Martin -
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>
Martin Sole wrote:
Martin Sole <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Looking for something completely different I discovered some RG62A/U
in a shop here today. I bought enough to make up a few of the special
interconnect leads for CAR and INJ on the C line. Question: How long
were the originals? Since this is low capacity cable I presume length
is an issue.
Thanks
Martin HS0ZED
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