Headphone

This is the final step of the analogue section: the headphone amp, volume control, and mixer.

The headphone amp is best tested at the end once all the jumpers are attached.

1N4148

2

D32, D33

100 ohm 5% resistor

1

R136

1K 5% resistor

1

R161

4.7K 5% resistor

1

R135

10K 5% resistor

3

R157, R158, R160

33K 5% resistor

1

R159

47K 5% resistor

1

R155

100K 5% resistor

4

R153, R154, R156, R165

50K D (log) potentiometer

1

VR8

.0068uF (2A682K) capacitor

1

C47

.01uF (2A103K) capacitor

1

C46

.068uF (2A683K) capacitor

1

C45

1uF electrolytic capacitor

3

C58, C59, C56

2.2uF electolytic capacitor

1

C51

10uF electrolytic capacitor

2

C50, C52

47uF electrolytic capacitor

2

C44, C53

100uF 10V electrolytic capacitor

2

C48, C49

1000uF electrolytic capacitor

1

C43

2SA733P, TO-92 PNP transistor

1

Q33

2SC536F, TO-92 NPN transistor

1

Q34

LA4140 9-SIP

1

IC14