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Circuit codex

TheAnalogMaker·circuit-codex·amps/ab763-twin/schematic.kicad_sch

This repository ships a schematic but no board layout.
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About the Circuit codex PCB

Circuit codex is an open source PCB design by TheAnalogMaker, published on GitHub under the MIT license. It is a board, with 84 components from 37 distinct parts.

By type, the board carries 7 capacitors, 4 transformers and 4 resistors.

It belongs with the audio designs in this gallery.

From the project

Open, verified archive of classic tube-amp circuits — redrawn KiCad schematics, ngspice-checked netlists, CC0 tube models · circuitcodex.com

An open, machine-readable archive of the circuits that made electric guitar.

Every classic amplifier circuit — redrawn as a clean KiCad schematic, verified as an ngspice netlist against published voltage charts, tagged with structured metadata, and connected to its ancestors and descendants in a navigable lineage graph (5F6-A → JTM45 → 1959 → 2204 …).

An Analog Maker project, live at circuitcodex.com. Guitar-pedal circuits are on the roadmap once the amp corpus is established.

Circuit codex bill of materials (BOM)

84 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
25u 50V
CB1
1
10p
CBD1
3
.047u
CBN2, CBV2, CCN2
1
.1u
CCD1
1
.003u
CCR1
2
.02u
CCV2, CTO3
4
25u
CKN1, CKTO1, CKTO2, CKV1
2
.01u
CTO1, CTO2
1
27k
RB2
2
220k 1W
RBAL1, RBAL2
1
1k 1W
RD1
1
4.7k 1W
RD2
1
100
RFB1
1
820
RFB2
1
3.3M
RGD1
2
220k 5%
RGL1, RGL2
4
1M
RGN1, RGV1, RTOG1, RTOG2
3
220k
RGR1, RTO1, RTOG4
6
1.5k
RKN1, RKV1, RST1, RST2, RST3, RST4
1
2.7k
RKTO1
Show 17 more
QtyPartRefs
7
100k
RKTO2, RLD1, RLN1, RLN2, RLR1, RLV1, RLV2
4
470 1W
RSC1, RSC2, RSC3, RSC4
1
22k
RT22
1
10M
RTO10
1
2.2M
RTOG3
1
125P34A · 340-0-340 V
T1
1
125C1A
T2
1
125A29A
T3
1
125A20B
T4
6
12AX7 (7025)
V1A, V1B, V2A, V2B, V4A, V4B
4
12AT7
V3A, V3B, V6A, V6B
2
12AX7
V5A, V5B
4
6L6GC
V7, V8, V9, V10
2
.1u 400V
C1, C2
2
70u 350V
C10, C11
3
20u 525V
C12, C13, C14
4
68k
R1n, R1v, R2n, R2v

Circuit codex design files

The KiCad project lives in the TheAnalogMaker/circuit-codex repository on GitHub; these links point at the commit this page was built from.

Circuit codex: common questions

How many components are on the Circuit codex?

84 components, from 37 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Circuit codex design files?

From the TheAnalogMaker/circuit-codex repository on GitHub, which has the schematic and the BOM; the links under Design files point to each one.

Can I use the Circuit codex design in my own project?

Yes, under the terms of its MIT license, which TheAnalogMaker chose for the repository.

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