Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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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.
The C-Line can use the same cables, except there are two cables (INJ and CAR OSC) that need to be low capacity. The ANT lead should probably be RG-58 coax, but it's really not long enough to be significant.
73, Garey - K4OAH Atlanta
Drake C-Line Service Manual <http://hr99.home.mindspring.com/R-4C_Servicez/>
Eric Webner wrote:
My entire set of cables for my 4-line are labelled at each end, i.e. CAR OSC, INJ, ANTI-VOX, and so on. The cables all look the same, so I don't know how one would tell the difference if the labels fell off the cable ends.
73,
Eric
*/"[EMAIL PROTECTED]" <[EMAIL PROTECTED]>/* wrote:
"[EMAIL PROTECTED]" made an utterence to the drakelist gang ---------------------------------------------------------------------- Can you identify the factory supplied cables that came with the 4 line by looking at the plug end of the cable?
If not,is there any other way to identify the low cap. cables?
Phil W8UV
<http://us.rd.yahoo.com/evt=31637/*http://smallbusiness.yahoo.com/resources/>
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