Bill of materials

Download section

The latest version (11/02/2019) of the BOM can be downloaded here.
The latest version (10/11/2018) of the PCB layouts can be downloaded here.
The latest version (16/11/2018) of the wiring instructions can be downloaded here.
And the latest version (27/12/2019) of the hex fastener tool can be downloaded here.

The content of the BOM, the PCB layouts, wiring instructions and hex fastener tool are provided as-is and could contain inaccuracies, typographical errors and out-of-date information. Therefore the provided files may be updated or changed without notice at any time. Use of the information is therefore at your own discretion.

Test files

Proper sine wave and noise files can be downloaded here:

White noise
Sine wave 177 Hz
Sine wave 265 Hz
Sine wave 390 Hz
Sine wave 550 Hz
Sine wave 800 Hz
Sine wave 1200 Hz
Sine wave 1770 Hz
Sine wave 2650 Hz
Sine wave 3900 Hz
Sine wave 5500 Hz

Selection of resistors

The proposed MCMF50 series resistors are axial leaded precision metal film resistors with a tolerance of ±1%. To allow the filters to flow correctly in each other at the right frequency you need this precision resistors.

The BOM does refer to 1/2 Watt resistors, this a consciously choice to get the old-fashioned look of the original device. But also 1/4 Watt or 1/8 Watt resistors are perfectly suitable. To change freely in everyone's sole discretion.

Backplane

Board layout