The single-core PK1 field cable is intended for the construction of field telephone and long-distance lines. In particular, a double line from PK1 was used, as a single-wire line, in which the second conductor is the ground, is easier to listen to.
Material: 3 x Cu and 4 x Fe conductor diameter 0.355 mm each
Insulation: softened polyvinyl chloride (PVC)
Cable length on spool: 1000 to 1015 m
Cable weight with spool: 16 kg
Resistance of 1 km of cable: 56 to 62.5 Ohm
Insulation resistance: min. 2.5 Mohm
Range for permissible audibility with TP25: 23 km
Maximum permissible air overhang: 100 m
Source: Spoj-51-2 (1962)
Material: 3 x Cu and 4 x Fe conductor diameter 0.355 mm each
Insulation: softened polyvinyl chloride (PVC)
Cable length on spool: 1000 to 1015 m
Cable weight with spool: 16 kg
Resistance of 1 km of cable: 56 to 62.5 Ohm
Insulation resistance: min. 2.5 Mohm
Range for permissible audibility with TP25: 23 km
Maximum permissible air overhang: 100 m
Source: Spoj-51-2 (1962)