This circuit uses a contactor having been found in a 1987 publication. More modern equivalent devices may be used. The circuit has neon indicator lamps.
This circuit is from an 80's American documentation. The circuit uses components of the time which...
This circuit is from a NEC megaphone made in Japan in the 60s. The circuit has 4 W of power and...
Found in an Electronic Design, this circuit is intended to produce signals in the VHF band. The...