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Carbon Microphone

The 1277 carbon microphone is the commercial equivalent to US military item M-35/U. Typically used in H-33F/PT type handsets.


Part ID Description Diam (in) Height (in) Sensitivity (DBv) Impedance (Ω) Weight (g) Photo (front) Photo (back) Photo (side)
1277 Microphone, Carbon, 40Ω 1.227 .375 -28 ± 6 40 ± 8 10 ± 2



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