The BC-614 Speech amplifier is an audio-frequency amplifier which is designed for use with the BC-610 Radio transmitter or transmitters of a similar type. The basic purpose of the speech amplifier is raise a microphone signal to a suitable level for driving the input of the audio circuits of the transmitter.
The speech amplifie does also provides a sidetone to monitor CW transmissions with a headset.
The speech amplifier has its own plate-circuit and gets its power from the transmitter from the left socket on the front.
– Carbon microphone – +/-3 db from 200 to 2000 hz
– Dynamic microphone – +/- 3 db from 200 to 3500 hz
Amplifier type – a-f (audio-frequency)
Type of input signals – Voice
– Carbon microphone
– Dynamic microphone
– External telephone (field telephone – EE-8)
Output – 500 ohms, single-ended
Power output – Approximately 2 watts
Power supply – 115 volts. 50/60 hz
Weight – 31 pounds or 14 kilo’s
Manual : TM 11-5054