Messing with this tonight.
Its playing into balanced ortho's. the gain is stock at 2 and its just enough, not real loud but sounds just great!
yes this is meant for Pre duty, this is one way I test them.
that 12va transformer is too small, but was just sitting here. 20-25va would be better.
GRLV is set for +-18V heat sinks are 35C, with 4V of regulation
the buffer's are setup for 18v & that way I can use the cheaper servo's
room is 20C, buffer output transistors are 40-46C, transformer 42C