This 1960s Japanese 5-transistor radio is powered by 9 V and has good sensitivity for the medium wave range. The configuration is of the superheterodyne type with FI of 455 kHz.
This control from a 1989 publication can be assembled with several equivalent components. The SCR,...
Hig stability is the main feature of the 10 V regulator circuit shown in the figure and suggested by...
We found this circuit with duty cycle adjustment in the May 1988 Radio Electronics magazine. The...