Obtained in MIT documentation, this 4-stage circuit has high gain for small signals. The power supply sources 150 V.
This circuit was found in many record players with crystal phono pickups. The output power is 800...
This mixer or audio mixer uses common FETs that can be the BF245 or MPF102 and an operational...
This circuit was found in July 1986 Radio Electronics magazine. The maximum current is 1.5 A. The...