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.
We found this circuit in the June 1991 issue of Radio Electronics magazine. The integrated circuit is...
This circuit was found in a 1967 RCA documentation. The components are of the time. The circuit...
This timer for short intervals was found in a documentation from 1966. The transistor is made of...