Aion CONSTELLATION Manual de usuario

CONSTELLATION VINTAGE FUZZ 1

PROJECT NAME

CONSTELLATION

BASED ON

EFFECT TYPE

PROJECT SUMMARY

DOCUMENT VERSION

Shin-Ei Companion FY-2

An early silicon fuzz known for its scooped-midrange tone. This adaptation is updated with a switchable

volume boost stage as well as a control to dial back the scoop.

Fuzz 1.0.0 (2019-11-28)

BUILD DIFFICULTY

Easy

Actual size is 2.3” x 1.86” (main board) and 1.78” x 0.86” (bypass board).

CONSTELLATION VINTAGE FUZZ 2

TABLE OF CONTENTS

1Project Overview 7Enclosure Layout

2Introduction & Usage 8Wiring Diagram

3-4 Parts List 9Licensing

5Schematic 9Document Revisions

6Drill Template

INTRODUCTION

The Constellation Vintage Fuzz is an adaptation of the Shin-Ei Companion FY-2, an early 1970s silicon

transistor fuzz that was also re-labeled under the brand names Avora, Jax, Kimbara, Thomas and Zenta.

The FY-2 is the slightly-less-famous and often-mistaken precursor to the FY-6, which was best known

for being re-branded as the Univox Super Fuzz. The FY-2 does not have the octave effect of the Super

Fuzz, but it does have the same scooped midrange character.

The fuzz control of the FY-2 is an odd setup that shifts the balance between the two transistor stages

rather than directly controlling gain. Many people wonder whether it’s working right because it doesn’t

seem to change the intensity of the effect as it’s turned, just the harmonics and texture. This is how it’s

supposed to work. It’s not tremendously useful, so most people just leave it up all the way.

The Constellation project is faithful to the original FY-2, with two additions: 1) a control to allow the

characteristic mid-scoop to be dialed back into more of a flat EQ, and 2) an optional volume boost stage

before the master volume control at the end. The original unit suffers from excessively low volume, so

the make-up gain stage from the FY-6 has been adapted for this circuit. With the gain boost disabled and

the Scoop control at maximum, the circuit is 100% identical to a vintage FY-2.

USAGE

The Constellation has the following controls:

• Fuzz controls the harmonics and texture of the fuzz tone.

• Scoop allows the mid-scoop to be lessened in intensity for more of a full-range fuzz. Note that the

volume will decrease as this control is turned up, so the optional boost stage should be used at

higher Scoop settings, but isn’t as crucial if this control is dialed back.

• Volume is the master output volume control.

• Boost (toggle) enables or disables an optional gain stage at the end of the circuit.

CONSTELLATION VINTAGE 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 2M2 Metal film resistor, 1/4W

R2 22k Metal film resistor, 1/4W

R3 2M2 Metal film resistor, 1/4W

R4 47k Metal film resistor, 1/4W

R5 100k Metal film resistor, 1/4W

R6 10k Metal film resistor, 1/4W

R7 15k Metal film resistor, 1/4W

R8 100k Metal film resistor, 1/4W

R9 15k Metal film resistor, 1/4W

R10 1k Metal film resistor, 1/4W

R11 10k Metal film resistor, 1/4W

R12 100R Metal film resistor, 1/4W

RPD 2M2 Metal film resistor, 1/4W Input pulldown resistor.

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

C2 1n 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

C5 3n3 Film capacitor, 7.2 x 2.5mm

C6 2n2 Film capacitor, 7.2 x 2.5mm

C7 1n Film capacitor, 7.2 x 2.5mm

C8 100n Film capacitor, 7.2 x 2.5mm

C9 1uF Film capacitor, 7.2 x 3.5mm

C10 1uF Film capacitor, 7.2 x 3.5mm

C11 100uF Electrolytic capacitor, 6.3mm Power supply filter capacitor.

C12 100n MLCC capacitor, X7R Power supply filter capacitor.

D1 1N5817 Schottky diode, DO-41

Q1 2N3904 BJT transistor, NPN, TO-92 Substitute. Original uses 2SC536F (hFE 160-320)

Q2 2N3904 BJT transistor, NPN, TO-92 Substitute. Original uses 2SC536F (hFE 160-320)

Q3 2N3904 BJT transistor, NPN, TO-92

CONSTELLATION VINTAGE FUZZ 4

PARTS LIST, CONT.

PART VALUE TYPE NOTES

FUZZ 50kB 16mm right-angle PCB mount pot

SCOOP 50kB 16mm right-angle PCB mount pot

VOL. 50kB 16mm right-angle PCB mount pot

BOOST DPDT Toggle switch, DPDT

LED 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 panel mount Mouser 163-4302-E or equivalent.

BATT Battery snap 9V battery snap Optional. Use the soft plastic type—the hard-shell type will not fit.

FSW 3PDT Stomp switch, 3PDT

ENC 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1.

SCHEMATIC

CONSTELLATION VINTAGE FUZZ 5

GND

2M2

1N5817

100uF

50kB

GND

50kB

+9V

100n

47n

2M2

2N3904

GND

22k

47n

2n2

2N3904

2M2

GND

47k 100k

47n

3n3

10k

15k

100n

GND

2N3904

1uF

100k

15k

GND GND

10k

1uF

GND

100R

RPD

C11

FUZZ

SCOOP

VOLUME

OUT

C12

R4 R5

BOOST_A

BOOST_B

B1 Q3

R8R9

R10 R11

C10

R12

GND

CONSTELLATION VINTAGE FUZZ 6

DRILL TEMPLATE

Cut out this drill template, fold the edges and tape it to the enclosure. Before drilling, it’s recommended

to first use a center punch for each of the holes to help guide the drill bit.

Ensure that this template is printed at 100% or “Actual Size”. You can double-check this by measuring

the scale on the printed page.

Top jack layout assumes the use 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 LED bezel, available from several parts suppliers. Adjust

size accordingly if using something different, such as a 3mm bezel, a plastic bezel, or just a plain LED.

0 1 2

0 1

INCH

x: -0.65, y: +1.71 x: 0.65, y: +1.71

ø9/32” ø9/32”

x: -0.85, y: +0.66

ø1/4”

x: 0, y: +0.66

ø9/32”

x: 0, y: -1.20

ø15/32”

x: -0.775, y: -1.20

ø5/16”

CENTER (0,0)

ø3/8” ø1/2”

0.385”

0.625” 0.625”

ø3/8”

OUT DC IN

125B

VOLUME

BOOST SCOOP

FUZZ

FOOTSWITCHLED

CONSTELLATION VINTAGE FUZZ 7

ENCLOSURE LAYOUT

Enclosure is shown without jacks. See next page for jack layout and wiring.

125B

CONSTELLATION VINTAGE FUZZ 8

WIRING DIAGRAM

125B

IN +VGND N.C. N.C. OUT

PCB

GND +V +V JACK GND JACK

OUTIN

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-right lug of the DC jack unconnected.

CONSTELLATION VINTAGE FUZZ 9

LICENSE & USAGE

No direct support is offered for these projects beyond the provided documentation. It’s assumed

that you have at least some experience building pedals before starting one of these. Replacements and

refunds cannot be offered unless it can be shown that the circuit or documentation are in error.

All of these circuits have been tested in good faith in their base configurations. However, not all the

modifications or variations have necessarily been tested. These are offered only as suggestions based

on the experience and opinions of others.

Projects 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 (1) you cannot resell the PCB as part of a kit without prior arrangement, and (2) you cannot

“goop” the circuit, scratch off the screenprint, or otherwise obfuscate the circuit to disguise its source.

(In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but

please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!)

DOCUMENT REVISIONS

1.0.0 (2019-11-28)

Initial release.

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