This receiver was found in a Japanese publication in 1967. The circuit uses germanium transistors and details of the coils are not given. Power is supplied by a 9 V battery.
The values of the components of this Mullard (Philips) circuit depend on the desired voltages. The...
Found in an English publication from 1977 this audio amplifier provides an output of a few...
This reducer was found in documentation from the 1980s, using transistors of the time. The higher...