The ‘Brick’ was the first of my ‘Voice Channel’ units (hence ‘VC’). It was smaller than the conventional 2U rack unit but the circuit was almost identical to your VC1. It has become a legend because of the really clean and smooth sound it produced with the less-expensive Chinese mics. I’m thinking seriously of re-issuing it.
The meter in your unit is made by ‘Monocor’ in Germany. I’m sorry, I don’t have spares for that meter, nowadays we have our own meters made for TFPRO.
I’m really sorry I can’t help on this one. 😥