Unlike the A77, the B77 has its mounting threads in the capstan motor housing. The clearance holes in the B77 chassis would need to be slotted.
From: Association for Recorded Sound Discussion List [[log in to unmask]] On Behalf Of Richard L. Hess [[log in to unmask]]
Sent: 09 May 2010 12:12
To: [log in to unmask]
Subject: Re: [ARSCLIST] Seeking Revox B77 or C274 Slow-Speed Tape Machine...
Hi, Nigel and all,
I converted two A77s to high-speed by slotting the motor shafts and
using machine screws and nuts to secure the motors. The first time I
did it, I carefully calculated the required offset and had a
machinist at my job mill the holes precisely for me. The second time,
I copied what had happened the first time very carefully with a round file.
While I prefer other methods of doing this type of transfer, this is
a possible route.