MIL-M-13189 Revision A:1954
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
MICROPHONE-ELEMENTS, CARBON AND EARPHONE ELEMENTS, MAGNETIC (FOR TELEPHONE AND RADIO USE)
06-07-2016
Requirements for 28 ohm nominal impedance carbon microphone element and 128,256 or 3,000 ohms, plus or minus 15 percent impedance magnetic earphone elements for radios/telephones.
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