This 4-voltage power supply using zener diodes has a maximum recommended current of 25 mA. The circuit was found in the May 1966 Radio Electronics magazine.
This circuit, for bands above 15 MHz, was found in an Argentine publication from the 1970s. The L1...
May 2017 - The new Wolfspeed 650 V Schottky rectifier diodes can now be purchased from Mouser...
The action of this circuit, found in a 1977 amateur radio documentation, is like to a delay line....