A friend built his own Big Bang Bar from original or reproduced parts. The "EL lamp control PCB" was a problem, neither the board nor the schematics seem to be available. But we knew the board's tasks and had some good pictures from an owner of an original BBB.
This allowed me to reconstruct the electronics and design a new PCB with the same functionality. It is now finished and works well in my friend's BBB. It has the same size and pin assignment as the original and can therefore be used as a 1 : 1 replacement.

I attached a picture of the new board and the schematics.
Is anyone else interested in this reproduction?
DSC07976 (resized).JPGBBB_SCH.PDF

I received some requests for the EL board - thank you.

This encouraged me to update the board design to version 2 (the current version has some issues) and write the new documentation in English (see attached PDF). I will soon order a small number of new PCBs in Hongkong, this will need some time for shipping and customs.

When the new board is available I will send a definite offer to all potential buyers.
BBB-EL Board.pdf

Yes, there will be photos as soon as everything is finished. My friend is very close - some parts are still missing but already in work.

Meanwhile I build and sent some of the EL boards to BBB owners. And I still have a small number of boards and parts available. All specs are given in the attached updated version of the manual.
BBB-EL Board.pdf