I haven't. I briefly had a BC-2B module in my possession a couple of years ago, but I didn't have the presence of mind to test the transformers. They could easily have been "plain wrapper" versions of the LS-10 and LS-27. I've never seen the actual transformers contained within those palatial cast enclosures that the LS series came in, so I don't know how big they are. I would guess that they are very good transformers, based on my experience with the UTC HA-100X. In any case, they are worth real money to vintage mic pre afficionados, even if they turn out not to work out for you!
