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.
Found in a 90s Popular Electronics, this circuit interfaces the telephone line with an audio...
This excellent rectangular signal generator was found in a 1989 Radio Electronics. The ranges are...
This circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit is based...