This circuit for analog VHF televisions was found in the 1989 Radio Electronics Experimenter magazine. It also works for FM receivers.
This highly sensitive circuit causes one relay to be closed when the other is open or still...
This amplifier circuit with a low power MOSFET was found in Popular Electronics from the 90s. The...
A high-frequency square wave oscillator using an LC-tuned circuit is shown here. The upper...