OK, just to make sure I got it - The output trafo of the BDT preamp replaces the input trafo of the Zeus amp - the Com+ & Com- of the BD preamp are tied together & get the bias voltage (~4.5V) applied here to bias the Mosfets of the Zeus amp?
I also asked a question above about how the VR might be scaled up for power amp use - I'm thinking of integrating this preamp onto a "baby Huey" circuit I have and having a preamp out option for feeding my Zeus.
The feed from the BDT to baby huey will probably be SE and not as elegant as the differential input into the Zeus
