This circuit was found in an American documentation from 1970. We can increase the number of multiplier steps to have higher output voltage. The operating frequency is around 1.35 kHz.
This primitive solar radio was found in a Gernsback publication from 1960. The transistor is made...
The signal injector illustrated in the figure uses a single integrated circuit and generates...
This Star Trek red alert circuit was found in the July 1990 issue of Radio Electronics magazine. The...