50Hz vs. 60Hz

Folks, I'd appreciate some thoughts in general, and on some specific cases, on using 50Hz DEC equipment on 60Hz power, since I've started processsing and restoring a large quantity of DEC equipment I've brought over from my UK storage to the USA: 1. Thinking about old DEC logic power supplies in general (pdp-8, -11, -12, -15 etc), is there liable to be any problem with using equipment sold in 50Hz countries on US 60Hz supplies? Obviously output voltages would be checked as a matter of course anyway! Equipment which uses motors is, I would have thought, liable to be more of a problem, for instance: 2. Tapes. Would 9-track (e.g. TU45, TU16 etc.) tapes be likely to be a problem? It occurs to me the transport speed might be a little off... 3. DECtapes (& LINCtapes) : I would imagine they would be less of a problem; they're self-clocking and practically indestructible - you can almost read a DECtape with a toothbrush, some tinfoil, and a set of bicycle pedals! Thoughts? 4. Disks. Biggest problem I would imagine. RK05s I know have different motor pulleys - they're stamped 50Hz or 60Hz. I would imagine running a 50Hz unit on 60Hz wouldn't work, the heads would never load because it would never be detected going at the correct speed. And even if they did load there might be air bearing issues due to incorrect speed. I have around 7 or 8 50Hz RK05s, but only 3 60Hz, so... does anyone have any spare 60Hz RK05 pulleys, or motors with 60Hz pulleys attached? What about RL and RX drives? Similar problems? Many thanks for any advice Mike http://www.corestore.org _________________________________________________________________ Bing? brings you maps, menus, and reviews organized in one place. Try it now. http://www.bing.com/search?q=restaurants&form=MLOGEN&publ=WLHMTAG&a…