Hi, Nigel,

As I recall, the A77 has the threads in the motor housing as well.
That was why I said bolts and nuts. I drilled out the threads and
slotted the motors and then put longer machine screws through with
washers, lockwashers, and nuts on the back.

I know I didn't take the chassis apart to slot it. I'm pretty sure
it's the same. I looked at the A77 manual. Section H, PL9 shows the
threads in the motor as I recall.

Cheers,

Richard


At 11:05 PM 2010-05-08, you wrote:
>Hi Richard
>
>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.
>
>Best wishes
>Nigel
>________________________________________
>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.

Richard L. Hess email: [log in to unmask]
Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.