We found the circuit of this Japanese transistorized commercial receiver in a documentation from the 1960s. It is a radio for the medium wave range with 6 transistors and 9 V power.
This grid-dip meter was found in a 1956 documentation from Sylvania. It can be implemented with...
This three-transistor amplifier uses a JFET at the input to increase the input impedance. The...
Mouser Electronics already has Intersil's IS8215M Power Step-Down modules, suitable for...