7C
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7C Speech Amplifier, Front view
7C Speech Amplifier, Back view
The 7C Speech Amplifier is a rack-mounted audio amplifier coupled between the microphone and the RF modulator unit.
The 7C is a system component of the 30FXB Transmitter.
Variations
The 7C was also packaged as a portable unit - seen here with a Brush Crystal Microphone.
Circa
1935
