Found in Radio Electronics from the 90s, this circuit is intended for analog TV applications of the time. The transistor used as well as the module are uncommon components today.
The output current for this source depends on the voltage applied to the input. The operational...
This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon...
The unijunction transistor for this circuit, found in a 1976 publication, may be 2N2646. The...