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Circuit Bench

1 kHz Tuned Filter 741 (CB19118E)
The gain of this circuit at 1 kHz [and 40 dB falling rapidly when the frequency deviates from this...
a Humidity Sensor (CB25721E)
When the probes of this circuit meet water, the relay closes its contacts. The circuit is from a May...
Q Multiplier (CB10064E)
This circuit is suitable for use with 1400 kHz range FI receivers. Changes can be made to other IF...