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ASTRA SILICON FUZZ

3

PARTS LIST

This parts list is also available in a spreadsheet format which can be imported directly into Mouser for 
easy parts ordering. Mouser doesn’t carry all the parts (most notably potentiometers) so the second tab 
lists all the non-Mouser parts as well as sources for each.

View parts list spreadsheet

 

→ 

PART VALUE

TYPE 

NOTES

R1

1M

Metal film resistor, 1/4W

Analogman version uses 1.2M here.

R2

22k

Metal film resistor, 1/4W

R3

470k

Metal film resistor, 1/4W

R4

1M

Metal film resistor, 1/4W

Analogman version uses 1.2M here.

R5

1k8

Metal film resistor, 1/4W

R6

1k8

Metal film resistor, 1/4W

Analogman version uses 470R here.

R7

100R

Metal film resistor, 1/4W

Power supply filter resistor (not on original unit)

LEDR

4k7

Metal film resistor, 1/4W

LED current-limiting resistor. Adjust value to change LED brightness.

C1

47n

Film capacitor, 7.2 x 2.5mm

Analogman version uses 470n here.

C2

47n

Film capacitor, 7.2 x 2.5mm

C3

47n

Film capacitor, 7.2 x 2.5mm

C4

47n

Film capacitor, 7.2 x 2.5mm

Analogman version uses 470n here.

C5

100uF

Electrolytic capacitor, 6.3mm

Power supply filter capacitor.

C6

100n

MLCC capacitor, X7R

Power supply filter capacitor.

D1

1N5817

Schottky diode, DO-41

D2

1N914

Fast-switching diode, DO-35

D3

1N914

Fast-switching diode, DO-35

D4

1N914

Fast-switching diode, DO-35

D5

1N914

Fast-switching diode, DO-35

D6

1N914

Fast-switching diode, DO-35

D7

1N914

Fast-switching diode, DO-35

D8

5mm

LED, 5mm, red diffused

Can also use 3mm LEDs.

D9

5mm

LED, 5mm, red diffused

Can also use 3mm LEDs.

Q1

2N3904

BJT transistor, NPN, TO-92

Original uses 2N3565. 2N3904 is an exact substitute.

Q2

2N3904

BJT transistor, NPN, TO-92

Original uses 2N3565. 2N3904 is an exact substitute.

Summary of Contents for ASTRA SILICON FUZZ

Page 1: ...NT VERSION Astrotone Fuzz An early silicon fuzz from 1966 that was also sold as the Sam Ash Fuzzz Boxx One of the first drive circuits to include a tone control Silicon fuzz 1 0 1 2021 04 27 BUILD DIF...

Page 2: ...ed his version of the Astrotone conveniently also called the Astrotone since the original trademark had expired It has the exact same topology but has several component values changed out to round out...

Page 3: ...film resistor 1 4W LED current limiting resistor Adjust value to change LED brightness C1 47n Film capacitor 7 2 x 2 5mm Analogman version uses 470n here C2 47n Film capacitor 7 2 x 2 5mm C3 47n Film...

Page 4: ...D 5mm LED 5mm red diffused IN 1 4 stereo 1 4 phone jack closed frame Switchcraft 112BX or equivalent OUT 1 4 mono 1 4 phone jack closed frame Switchcraft 111X or equivalent DC 2 1mm DC jack 2 1mm pane...

Page 5: ...most diodes Therefore while DO 7 silicon diodes are rare today this would not be uncommon to see in 1966 The other evidence in favor of them being silicon is more practical since they re hard clipper...

Page 6: ...kB 100kB GND 47n 2N3565 2N3565 1M 22k 470k 1M 1k8 1k8 47n 47n GND GND GND GND 47n VA VA VA GND 100R 1N914 1N914 1N914 1N914 1N914 1N914 GND IN OUT D1 C5 C6 LEVEL 1 2 3 TONE 1 2 3 ATTACK 1 2 3 C1 Q1 Q2...

Page 7: ...of closed frame jacks like the Switchcraft 111X If you d rather use open frame jacks please refer to the Open Frame Jack Drill Template for the top side LED hole drill size assumes the use of a 5mm L...

Page 8: ...ASTRA SILICON FUZZ 8 ENCLOSURE LAYOUT Enclosure is shown without jacks See next page for jack layout and wiring 125B...

Page 9: ...125B IN V GND N C N C OUT PCB IN GND V V JACK GND JACK OUT IN GND GND PCB OUT Shown with optional 9V battery If battery is omitted both jacks can be mono rather than one being stereo Leave the far ri...

Page 10: ...ojects may be used for commercial endeavors in any quantity unless specifically noted No attribution is necessary though a link back is always greatly appreciated The only usage restrictions are that...

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