Military specification 200m insulated stranded wire with 4 copper and 3 steel wires in a twisted configuration. The copper wire is tinned hard-drawn copper and the steel reinforcing wires are galvanised for added strength and durability.
The techno-blurb says that it is is a “flexible, yet tough single-pair wire for all types of terrain. It is operationally equivalent to field cable MIL-C-13294″.
NOTE: This is shipped as 2 lengths of twin 50m lengths (200m) of the cable which will need to be untwisted. Do this by tying one end of the pair to a tree (or a vice) and put an electric or battery drill on the other end and “drill” in a clockwise rotation slowly and it’ll unravel. Be careful when you extract the wires from the drill chuck because although the wires may look untwisted together, they will each have a corresponding twist induced in them individually. So hang on to each wire, pull them apart and let them untwist themselves.
- Insulation: Black polyethylene
Outer sheath: Abrasion resistant transparent nylon
DC loop resistance: Maximum 151 ohm/km
Insulation resistance: Minimum 3500M ohm/km at 20°C
Dielectric strength: Minimum 3kV Breaking
load: 390N/conductor
Voltage rating: 600 volts rms at 2000Hz
Operating temp range: -40°C to +70°C
Each 100m run will give you 25 radials of 4m long each, almost too many for 40m band but you can also build quads, dipole etc.. I have built all my antennas from this over the years.