Obtained in MIT documentation, this 4-stage circuit has high gain for small signals. The power supply sources 150 V.
We found this circuit in an old publication. The transformer has a 9 or 12 V secondary, and the...
This experimental amplifier was found in the 1960 Mullard transistor reference manual. The...
This circuit was found in the September 1974 issue of Radio Electronics magazine. It consists of a...