Carbon Microphone
Microphone Characteristics
Output level @ 1KHz with 20mA DC applied
min: -25dBV max: -14dbV
Frequency response: refer to envelope #1
note: envelope is referenced to 1KHz level current: 20mA.
Impedance @ 1KHz
Typical gain @ 1KHz 85mA vs 20mA is +8dB.