This is a field strength meter found in an 80's Hands On. The circuit operates at frequencies up to 500 MHz and has a buzzer as its indicator. Can be used as a detector for spy transmitters.
Found in American documentation from the 90s, this circuit uses TTL technology and is therefore...
Found in a 1968 Electronic Design, this circuit is intended for suppression of trigger noise in...
This amplifier for audio transmission lines was found in a 1961 American publication. The critical...