HardLabs

Evil Head

a-wai·ampfactory·a-wai/Evil Head/Evil Head PCB.kicad_pcb

Evil Head PCB layout, top view — open source board by a-wai

About the Evil Head PCB

Evil Head is an open source PCB design by a-wai, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 280 × 120 mm, with 65 components from 39 distinct parts.

Other key parts include the ECC83 and 6V6. By type, the board carries 32 resistors, 13 capacitors, 12 connectors, 6 ICs, 1 jumper and 1 diode.

It belongs with the audio designs in this gallery.

From the project

A collection of tube amplifier schematics for guitar and bass

Amp Factory is a collection of free (as in "free speech", not "free beer") electronic schematics for tube amplifiers dedicated to guitar and bass.

The documents in the "a-wai" directory are the schematics for amplifiers manufactured by A-wai Amplification, a one-person company building handwired amplifiers in Toulouse, France.

These schematics are licensed under the terms of the version 3 of the GNU General Public License. Therefore, you are granted the right to use, modify and/or redistribute these documents under certain conditions, listed in the GNU General Public License (see LICENSE…

Main components on the Evil Head

ECC836V6

Evil Head bill of materials (BOM)

65 components, 39 distinct parts.

QtyPartRefs
4
ECC83
U1, U2, U3, U4
2
6V6
U5, U6
1
RLY+
P1
1
RLY-
P2
1
HT
P3
1
FROM LD EQ
P6
1
TO PA+
P9
1
FROM PRE+
P10
1
Ug2
P11
1
Ubias
P12
1
FROM PRE-
P13
1
EARTH
P14
1
TO LD GND
P15
1
TO PA GND
P20
1
JUMPER
JP1
1
1N4007
D1
1
22µ/450V
C1
1
33µ/450V
C2
1
47µ/450V
C4
4
100n
C5, C17, C19, C20
Show 19 more
QtyPartRefs
2
22n
C8, C9
3
47n
C10, C16, C18
1
10n
C14
2
10k
R2, R4
3
1.8k
R5, R12, R23
2
220k
R6, R24
1
10k/2W
R7
4
2.2M
R8, R11, R21, R26
1
1M
R9
8
100k
R13, R18, R19, R25, R30, R33, R37, R38
3
470k
R14, R29, R34
1
1M
R15
1
39k
R16
1
3.3k
R17
1
330k
R20
1
330k
R27
1
82k
R28
1
680R
R31
1
33k
R32

Evil Head design files

The KiCad project lives in the a-wai/ampfactory repository on GitHub; these links point at the commit this page was built from.

Evil Head: common questions

How big is the Evil Head PCB?

The Evil Head measures 280 × 120 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Evil Head?

65 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the Evil Head design files?

From the a-wai/ampfactory repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Evil Head design in my own project?

Yes, under the terms of its GPL-3.0 license, which a-wai chose for the repository.

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