Found in the 1969 neon lamp documentation, using neon lamps this circuit provides 18 V regulated with 0 to 4 mA current. The lamps are types of the time.
This battery-powered micropower supply was shown in Radio Electronics magazine in 1991. The...
Used by the police this receiver tuned to the low VHF band. The circuit is from a documentation from the...
This circuit was suggested by General Electric / RCA in a 1980s documentation. The components are of...