The input and output frequencies of this circuit depend on the coils and capacitors of the tuned circuits. The circuit is from Electronics Now magazine, February 1997.
A 3-terminal voltage regulator can be used as an efficient temperature regulator for a current...
Connected to the output of an audio amplifier or radio this circuit indicates the level of the...
This two-transistor circuit was found in a 1966 US documentation. The power transistors are of the...