This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting in a multimeter. The circuit is from an American documentation of the 1970s.
We found this circuit in a Popular Electronics from the 90's. The circuit uses three SCRs to...
Found in a QST magazine from the 90s, this circuit broadcasts on different amateur radio bands...
Found in a 1965 General Electric documentation, this circuit uses a zener diode to obtain the...