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 circuit shown in the figure consists of a system for driving white LEDs (WLEDs) at low...
The resonant circuit depends on the crystal frequency that can go up to a few megahertz. The...
This interesting circuit allows to obtain symmetrical voltages from a simple battery. Among its...