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Comment: cooler part number added


Issue ID




Identified issue


related for development

affected PCB version

fixed Version
130 Aug. 2022BOM - VoicesERROR

 Mouser part number for the trimmer is invalid 

Line 180: 652-3296X-1-103RLF
Line 181: 652-3296X-1-104RLF

BOM 1.0.0 and 1.0.1 update needed


230. Aug 2022BOM - MainboardINFOthe 220uF caps on the Mainboard are BI-POLAR  - respect the BOM partnumber

307 Sep. 2022Hardware BoardBUG

there's no Pinout described on the Hardware Board for the OLED - 

please read the INFO section in the next table on  "OLED  selection" carefullycan be improved with better silkscreen information1.0
413 Sep. 2022BOM: VoicesINFOthe Mouser BOM shows 32x 240pF C0G capacitors for the Voices - used in the OTA Filter. These are 10% can change the capacitors to Polypropylene, Silver MICA, Styrene - with 1-2.5% or match good capacitors in this range with an LCR meter (check the data sheets of the meter)  ---

create a Silkscreen for MTA156 Powerheader pinout1.0
629.Oct.2022VoicesBUGSync doesn't work correct

remove on every Voicecard IC3 (TL064).

bend Pin 12 of the TL064 outwards, install the IC3 back in the IC socket and solder a resistor leg from Pin12 to Pin10 as shown:

fix the PCB routing

717.Nov.2022PSU cardINFO

The DC-DC converter goes very hot after 30minutes, but its within the data sheet specs (65degrees Celsius is the max. operation).

The 65 degrees can be reached in Summer or other conditions (few hours operating time)

But for longterm stability of the components, I highly recommend the usage of a big cooler

install a 25x25mm cooler with an high of minimum 20mm.

I found on a product with self adhesive foil and 24.5mm height.

the temperature of the DC.DC converter is 51 degrees after an hour on the regulator and 43 degrees on the cooler.

TME Part nr.



Important Information before you start assembling: