MIL-DTL-83511/8A
REQUIREMENTS:
Interface: See figure 1. Figure 1 is for illustration purpose only and all referenced drawings and specifications
cover design.
Earphone: Earphone dynamic in accordance with MIL-PRF-25670, except:
a. Impedance - 300 ohms ±20%.
b. Waterproof to 3 feet of water.
Microphone:
Gentex: Electret Model 5075, Part Number N100107-01 or equal.
Sensitivity: -40 ±3 dB re 1V/Pascsal (300 ohms).
Supply voltage: 3 to 15 Volts dc.
Supply current: 6 ±2 ma at 3 Volts dc, 15 ma maximum at 15 Volts dc.
Weight: 15 grams maximum.
Microphone boom: 1 required, USAF Drawing 67B1854 or equal.
Cordage: In accordance with MIL-DTL-83511: Straight 4 conductor and retracted 7 conductor.
Schematic: See figure 2.
Switch: See figure 3, bar actuated in accordance with MIL-DTL-83511 and Army drawing SM-C-430302 or equal
to Astrocom Electronics P/N 10235A.
Intended use: To be used with SB22 switchboard.
Supersession data: this headset is functionally interchangeable and replaces headset type H-182/PT.
Sand and dust: The microphone-headset in its normal operating configuration shall be placed in a test chamber,
which has been vented to the atmosphere meeting the requirements of MIL-STD-202, method 110, sand and dust.
The microphone-headset shall show no evidence of sand and dust penetration and the individual frequency
response of the microphone and earphone taken after the test shall not exceed 3 dB degradation from respective
frequency response taken before the test.
Immersion: The microphone-headset in its normal operating configuration shall be subjected to immersion for 2
hours in 3 feet of fresh water at room temperature. The microphone-headset shall show no evidence of leakage
when tested.
Blast: 30 rounds with a minimum peak pressure of 9.5 psi as provided In accordance with drawing SK-N-864.
Verification: For additional requirements to MIL-DTL-83511, see table I.
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