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Uses a single op-amp integrated circuit. (LM741). The input of the circuit can vary from 100mV to 1V without clipping
EFK 12022 Electronic Thermostat
EFK 2001 Mini Pre-Amplifier
EFK 2002 Guitar Pre-Amp Tone Control
EFK 2003 Two Transistor Pre-Amplifier
EFK 2004 Three Transistor Pre-Amplifier
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