This 6-transistor radio was sold in Japan in the 1960s. The super-heterodyne circuit for the OM band was powered by ordinary batteries.
This static switch circuit or solid-state contactor was found in a Motorola documentation from...
Found in RCA documentation from the 1960s, this 60 V regulator has a 100 V input and a current of 1...
One of the problems with common 3-terminal regulators is that the internal reference, normally 1.25 V,...