This circuit is from a 2004 documentation serving for signals from 1 MHz to 160 MHz. The antenna is of the telescopic type and the analog instrument is of the type found in old sound equipment.
This circuit is suitable for modulating small FM transmitters for eavesdropping or espionage. The...
This circuit trips with negative pulses and the value of C depends on its intensity. C1 determines the...
The integrated circuit is not common nowadays since the configuration was obtained in Motorola's Linear...