2 layers70.6 × 67.6 mm Ecc88-gm test setup, the printed circuit board in 3D

Ecc88-gm test setup

misc electronic projects

Size: 70.6 × 67.6 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 29
Nets: 17
Pads: 92
Tracks, vias: 56, 0
Pours: 1
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 6 Oct 2020
Updated: 31 Oct 2026

Overview

Ecc88-gm test setup is an open-source printed circuit board by schenkmi, from the schenkmi/electronic-projects repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 2-layer board of 70.6 × 67.6 mm with 29 parts on 17 nets, routed with 56 tracks and 0 vias.

It is built around the DN2540N3-G. Its parts include 9 connectors, 5 capacitors, 4 resistors, 2 transistors and 1 IC. It belongs with the audio and music boards of this library.

Main components

DN2540N3-G
TO-92-55℃~+150℃ 1 N-channel 120mA 12pF 17Ω@0V 1W 1pF 300pF 400V N-Channel TO-92 MOSFETs ROHSMicrochip TechnologyMOSFETs

README

README.md

electronic-projects

misc electronic projects

History

2026.09.19

pre-amp-ECC86/kicad/psu-v6

Large PCB PSU for ECC86 with high side switch. Support LT3080 and LM317. Fix Drain/Source.

2026.09.02

pre-amp-ECC86/kicad/psu-v5

Large PCB PSU for ECC86 with high side switch. Support LT3080 and LM317

2026.08.26

pre-amp-ECC86/kicad/psu-v4

Large PCB PSU for ECC86 without relais. Support LT3080 and LM317

2026.08.23

input-sel-attenuator/software/v9

Power up timer to 64ms wait till voltage is stabilized

2026.08.10

pre-amp-ECC86/kicad/psu-v3

Large PCB PSU for ECC86

2026.08.01

pre-amp-ECC86/kicad/psu-v2

Shrinked and optimized PSU for ECC86

2026.07.22

pre-amp-ECC86/kicad/psu-v1

First version of PSU for ECC86

2026.07.12

pre-amp-ECC86/kicad/v1

First version of ECC86 based pre-amplifier

spdif-recv-ak4118-ak4137/software/spdif-recv-ak4118-ak4137-v4.X

Updated software for V4 PCB

2026.06.05

dac-pcm1702-v1/kicad-psu-v8/

DC/DC for +5V digital path

dac-pcm1702-v1/kicad-asrc-v14

PCB LED fix External LED support

spdif-recv-ak4118-ak4137/kicad/v4

External LED support Change one LDO to TLV1117-3.3 due to power dissipation

2026.05.28

dac-pcm1702-v1/kicad-asrc-v13

PCB re-design with fixed LED ordering

2026.05.27

pre-amp-26A7/ltspice/v2/

New CCS simulation with smaller FETs

2026.05.26

dac-pcm1702-v1/software/spdif-recv-asrc-4392-v12.X

New software for SPDIF ASRC receiver including UART and IR

2026.05.16

dac-pcm1702-v1/kicad-asrc-v12

PSU re-design, UART for debugging, I2C debugging, IR

spdif-recv-ak4118-ak4137/kicad/v3

Add IR support

2026.05.10

spdif-recv-cs8416-ak4137/kicad/v7

Improved power supply, I2S debug, Serial console

spdif-recv-ak4118-ak4137/kicad/v2

Small redesign

2026.04.25

spdif-recv-ak4118-ak4137/kicad/v1

Finalize and ordered

pre-amp-26A7/kicad/v2

Finalize and ordered

2026.03.29

pre-amp-26A7/kicad/v1

Finalize and ordered v1

2026.03.28

lv-psu-dcdc/kicad/fixed-v3

Better thermal management for DC/DC

lv-lownoise-psu/kicad/v7-dcdc-large-cap

Better thermal handling on DC/DC

input-sel-attenuator/kicad/v9-10k-47k

Changed footprint for L1 and C1

2026.03.11

lv-psu-dcdc/kicad/fixed-v2

Eval board with different inductors

hv-psu-discrete/kicad/maida-lt3080-v5

HV PSU with DC/DC for +5V output

2026.03.05

lv-lownoise-psu/kicad/v6-dcdc-large-cap

Finalize v6 with large reservoir cap

2026.02.25

hv-psu-discrete/kicad/maida-lt3080-v5-26A7GT

HV PSU for 26A7 pre-amp

2026.01.13

input-sel-attenuator/software/ir-debug-v3

Update MCC generated code

dac-pcm1792a/software/asrc-pcm1792a-v4.X

Update MCC generated code

dac-pcm1702-v1/software/v8

Update MCC generated code

spdif-recv-cs8416-ak4137/software/spdif-recv-cs8416-ak4137-v5.X

Update MCC generated code

input-sel-attenuator/software/v9

Update MCC generated code

rpi-hat-spdif/kicad/V9

RPI HAT SPDIF Output increase hole diameter to 3.2mm

rpi-hat-spdif/kicad/V9-min

RPI HAT SPDIF Output minized PCB increase hole diameter to 3.2mm

2026.01.01

adapter/spdif/kicad/v2

LVDS SPDIF XMIT with rotated connector

adapter/spdif/kicad/v2b

LVDS SPDIF XMIT with standard connector

rpi-hat-spdif/kicad/V7-min

RPI HAT SPDIF Output minized PCB

rpi-hat-spdif/kicad/V8

RPI HAT SPDIF Output new PCB

2025.12.20

adapter/spdif/kicad/v1

Finalize v1 LVDS SPDIF XMIT

rpi-hat-spdif/kicad/v6

RPI HAT SPDIF Output

rpi-hat-spdif/kicad/v6-min

RPI HAT SPDIF Output minimized

2025.12.08

pre-amp-ECC88/kicad/v9

Finalize and ordered v9

2025.09.29

retro/c64-user-port-led

Finalize v1 of C64 user port LED

2025.09.28

dac-pcm1704/kicad/dac-df1706-pcm1704-v2

Finalize and ordered v2

2025.09.21

dac-pcm1704/kicad/dac-pcm1704-v5

Finalize and ordered v5

dac-pcm1702-v1/kicad-i2s-nos-v7

Finalize and ordered v7

dac-pcm1792a/kicad/v6/

Finalize and ordered v6

2025.09.13

input-sel-attenuator/software/ir-debug-v2

input-sel-attenuator/software/v8

V2.5 2025.09.12 Shiny new push button and saving handling Use volume when doing channel switch.

2025.09.07

lv-lownoise-psu/kicad/v5-dcdc

Finalize and ordered v5

lv-lownoise-psu/kicad/v5-dcdc-large-cap

Finalize and ordered v5 with large reservoir cap

2025.08.25

lt1115-phono-mm-mc/kicad/v6

Finalize and ordered v6

2025.08.23

dac-pcm1702-v1/kicad-psu-v7

Finalize and ordered v7

Parts

Qty	Value	Footprint	References
4	Conn_01x01	Connector_Pin:Pin_D1.3mm_L11.0mm	J5, J6, J9, J10
4	MountingHole	MountingHole:MountingHole_3.2mm_M3_Pad_Via	H1, H2, H3, H4
2	100nF	Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C9, C11
2	1k/0.6W	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R5, R6
2	Conn_01x01	Connector_Pin:Pin_D1.0mm_L10.0mm	J16, J17
2	DN2540N3-G	Package_TO_SOT_THT:TO-92_Inline	Q1, Q2
2	Jumper_3_Open	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	JP4, JP6
2	~	Connector_Pin:Pin_D1.0mm_L10.0mm	J18, J19
1	100mVrms@1kHz	kicad-snk:RCA-Phono_CUI-Devices_RCJ-02X_Vertical	J15
1	100nF	Capacitor_THT:C_Rect_L16.5mm_W5.0mm_P15.00mm_MKT	C8
1	10R/0.4W/0.1%	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R7
1	1N4007	Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal	D1
1	1uF/100V	Capacitor_THT:CP_Radial_D5.0mm_P2.00mm	C10
1	220k/0.6W	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R8
1	2k	Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical	RV1
1	4.7uF/400V	Capacitor_THT:CP_Radial_D10.0mm_P5.00mm	C7
1	ECC88	w_vacuum:socket_gzc9-b	U1

Questions

How big is the Ecc88-gm test setup PCB?

It measures 70.6 × 67.6 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Ecc88-gm test setup use?

29 parts, built around the DN2540N3-G. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Ecc88-gm test setup KiCad files?

From the schenkmi/electronic-projects repository on GitHub, at the commit this page was made from: the board is tube-testers/ecc88/kicad/gm-v1/ecc88-gm-test-setup.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Ecc88-gm test setup design in my own project?

Its repository publishes it under the CERN-OHL-W-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Audio and music

Topics

amplifier audio diy electronics hifi kicad microchip-pic tube

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/schenkmi-electronic-projects-ecc88-gm-test-setup" title="Ecc88-gm test setup in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/schenkmi-electronic-projects-ecc88-gm-test-setup.jpg" alt="Ecc88-gm test setup" width="1200" height="900">

A picture that opens the board, for a README

[![Ecc88-gm test setup](https://pcbkit.io/embed/boards/schenkmi-electronic-projects-ecc88-gm-test-setup.jpg?size=s)](https://pcbkit.io/boards/schenkmi-electronic-projects-ecc88-gm-test-setup)

Source

Repository: schenkmi/electronic-projects
Board file: tube-testers/ecc88/kicad/gm-v1/ecc88-gm-test-setup.kicad_pcb
Commit: 8d54cdf
Licence: CERN-OHL-W-2.0
Copies: 2 copies in 1 repository

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