This circuit tests the reverse voltage of power diodes. The transformer is high voltage and so are the rectifier diodes. The circuit is from a 1976 QST magazine.
This circuit operates at the frequency of a small transmitter up to 27 MHz, triggering a relay from...
This medium wave radio with 7 germanium transistors was manufactured in Japan in the 1960s. Its...
In the figure we have the way to implement a power zener diode. The voltage depends on the zener,...