MIL-DTL-18266C
3.3.2.2 Conductor strands. The conductor strands shall be 9.8 circular mils (#40 AWG).
3.3.2.3 Conductor insulation. The conductor insulation shall be "free-stripping" and shall not have any
detrimental properties, which would make soldering of the conductors difficult. The conductor insulation
shall be in accordance with MIL-DTL-10392.
3.3.3 Cordage assembly. The single conductor cordage shall be composed of a conductor in
accordance with 3.3.2 and conductor insulation in accordance with 3.3.2.3. The multi-conductor cordage
shall be Type WM-59A/U in accordance with MIL-DTL-10392.
3.3.3.1 Outside diameter. The cordage shall have a maximum outside diameter of 0.059 inch (1.5
mm) for single conductor and 0.212 ± 0.010 inch (5.4 mm) for multi-conductor.
3.3.3.2 Electrical continuity (see 4.6.2). The electrical continuity shall be as shown schematically on
figure 1.
3.3.4 Tensile strength and elongation (see 4.5.5). The tensile strength and elongation of the conductor
strands shall exhibit the following performance.
Tensile strength
45,000 pound per square inch (psi) minimum
Elongation (in 10 inches)
13% minimum
3.3.5 Dielectric strength (see 4.5.2). The finished cordage shall withstand, without breakdown, the
specified voltage.
3.3.6 Insulation resistance (see 4.5.3). The insulation resistance of the finished cordage shall be not
less than 500 megohms per 1,000 feet at a temperature of 20 degrees C.
3.3.7 Transformer dc insulation resistance (see 4.6.3). The dc insulation resistance between the
primary and secondary windings within the transformer-plug shall be not less than 100 megohms at a
temperature of 20 degrees C.
3.3.8 Stay cord. Where more than one conductor is required, a central core or interstice filler shall
extend through the length of the cordage and shall be suitable for use as a strain-relief cord. The central
core or filler shall be a low stretch material with a 25 pound minimum breaking strength. Where a single
conductor is used, a stay cord will not be required; however, the conductor insulation shall be secured to
the terminal by a suitable bonder.
3.3.9 Flexing (see 4.5.6). The cordage shall be capable of withstanding at least 30,000 flexing cycles
without showing evidence of electrical discontinuity or change in specified characteristics of the insulation.
3.3.10 Transformer-plug.
3.3.10.1 Transformer. The transformer shall be of the isolating impedance matching type capable of
transferring audio frequency energy from a 600 ohm source (radio receiver output) to a 7.5 ohm load (two
15 ohm impedance earphones connected in parallel). The transformer shall provide a maximum power
transfer of one-half watt with a power insertion loss not to exceed 2.5 dB and with no direct current (dc)
flowing in either primary or secondary winding.
3.3.10.2 Size. The size of the transformer shall be governed by the dimensions of the transformer-
plug shell.
3
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business