Its a good idea to create a topic for this. One clarification needed though. This is specifically for the KSCC wire. I think SCCNH and SCCV are all set for now.
The 2 above cables take the "wire" in the direction of the SCCNH comm wire - this is very stiff wire that is also very tough. I will require somewhat different care to lay and retrieve than the very compliant wire we use now, but unlike a lot of all copper cables, that are also stiff, if handled correctly, this stuff should lay flat and not fatigue quickly with our repeated use. It has much greater tensile strength than the flexible stuff, so issues like hanging across the road, if needed, would only require some proper strain relief one both ends and not require support along the suspended length.
A downloadable PDF of WD-1 can be obtained here:
http://www.everyspec.com/MIL-SPECS/MIL- ... 94C_12128/
A web browser viewable PDF of the mil spec for the 1A wire can be seen here:
http://www.dscc.dla.mil/Downloads/MilSp ... l49104.pdf
Dimensionally these both are larger than we have now, so probably would require a larger spool. The splice and repair technique for this type wire is more involved and expensive. The AC performance above 4KHz is not specified as that was never an intended use but it can be assumed the terminal impedance is the same as all other closely spaced twin conductors - between 100 and 300 ohms. The insulation material is Nylon in the WD-1 and HDPE in the WD-1A. The HDPE would be the more favorable material from a dielectric perspective except it can assumed that both have been UV stabilized, probably with carbon black, which increases dielectric absorption, degrading high frequency transmission - e.g. we can probably forget modulating data at a high frequency onto the wire. They both spec that the Nylon or HDPE is UV stabilized so they should have similar useful lives outdoors. All this wire has probably gone past its shelf life so its condition now is going to depend a lot on how it was stored over the years. Fresh out of some military warehouse, is a good thing. Kicking around in someones drafty barn or back yard for 2 decades is not.
Current condition of the insulation is probably the most important parameter to us if we were to go this way. This suggests to me that it cannot safely be purchased site unseen.
The older I get the better I was.