Found in a 90s Electronic Design, this circuit operates with Maxim components of the time. The circuit operates at 50 MHz with a 10 V x 50 mA current.
This is an old test circuit for integrated TTL counters, feeding a Nixie tube, common at the time....
This traditional crystal radio circuit, but which has a modern version with diode, was found in an...
This headphone amplifier using a pickup coil can be used as an extension for devices such as TVs,...