This 4-waveband converter circuit was found in Radio Craft September 1948. The power supply is not given, but the supply voltages are indicated.
This simple 60's receiver is powered by solar cells of the time. The transistor is made of...
This circuit has a duty cycle of 50%. We found it in old English documentation. The center...
The National Semiconductor LM377 integrated circuit consists of a low power audio amplifier. This...