This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
This sensitive electrostatic charge detector uses only common discrete components. The circuit can be...
This circuit is used in communications receivers to silence noise that occurs in poor signal...
Suggested by General Electric in a 1965 publication this circuit uses a light bulb. Can be changed...