Audio Schematics

Vintage Audio Amplifier Schematics

2 W Audio Amplifier with PA 237	5 W Audio Amplifier with IC 10	5 W Audio Amplifier with PA 246
10 W Audio Amplifier	10 W Audio Amplifier with Germanium Transistors	16 W Audio Amplifier
45 W Audio Amplifier	60 W Audio Amplifier	Audio Amplifier for 15, 30, 40, 60 and 120 W
Adjustable Regulated Power Supply from 2-32 V / 1 A	Adjustable Regulated Power Supply from 0-15 V	Assembled Pre-Amplifier
Assembled Regulated Power Supply	Assembled Amplifier	1 - 2.5 W Audio Amplifier
3.6 W Audio Amplifier	1.4 W Audio Amplifier	1 - 2.5 W Audio Amplifier
4 W Audio Amplifier	5 W Audio Amplifier	7 W Audio Amplifier
10 W Audio Amplifier	15 W Audio Amplifier with Germanium Transistors	18 W Audio Amplifier
40 W Audio Amplifier with Positive Ground	50 W Audio Amplifier	Audio Pre-Amplifier for Microphone with Magnet Pick Up
Bass-Treble Adjustment	Bass/Treble Adjustment Circuit	Distortion vs. Frequency
Distortion vs. Power	Chart of Equivalent Transistors	Frequency Characteristics
Frequency Characteristics	Frequency Characteristics	High Temperature Protection Circuit
Pin Connections for PA 237	Pre-Amplifier and Driving Amplifier with Tone Regulation	Regulated Power Supply for 12.8-14.5 V/0.5 A
Regulated Power Supply for 24 V	Regulated Power Supply for 35 V	Right / Left
Table 6	Universal Audio Pre-Amplifier	Universal Power Supply for All Amplifiers

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