We found this circuit in a 90s Popular Electronics. The circuit uses a pickup coil that consists of 100 to 200 turns of wire 28 around the cable to be monitored.
This circuit uses a common multimeter on the voltage scale to measure the beta gain of a...
This amplifier is from a 1990s Linear Technology component manual. The circuit requires...
Found in a Hands On Electronics of the 80s, this circuit makes use of a gas sensor of the time....