Test circuit with bridge (CB22530E)

This bridge-biased transistor test circuit measures gain in the range 0 to 300. Circuit is from Radio Electronics June 1952.

Voltage Doubler (CB20196E)
In the figure we have three voltage doubler configurations that can be used in high and low...
Low Power AC Shield (CB18265E)
In this application, from English documentation, we have the way to activate an AC load up to 10 W...
Reflex receiver (CB20557E)
This 1-transistor reflex receiver was found in a 1963 publication. The coil is for the mid wave...