10 Nov
2018
10 Nov
'18
12:05 p.m.
On Sat, Nov 10, 2018 at 7:42 PM dwight via cctalk <cctalk at classiccmp.org> wrote:
He needs a larger pulley if going from 60 to 50 ( as a motor pulley ). It needs to be 20%
bigger because the motor turns slower on 50 Hz. 6/5 to be exact.
I like the way Tektronix handled this issue in the 8560 (service manual on
Bitsavers). They produced a 60Hz supply by chopping rectified and
smoothed mains, thus the incoming mains frequency does not matter.
An 8560 will work in the States or in Europe with no pulley changes.
-tony