Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!uakari.primate.wisc.edu!dali.cs.montana.edu!milton!davisson From: davisson@milton.u.washington.edu (Gordon Davisson) Newsgroups: comp.sys.mac.hardware Subject: Re: PowerKey question Message-ID: <18087@milton.u.washington.edu> Date: 9 Mar 91 09:21:43 GMT References: Organization: University of Washington, Seattle Lines: 24 In article leo@duttnph.tudelft.nl (Leo Breebaart) quotes Alan Cooney about using PowerKeys outside the USA: >Although my apparent praise of this product may make it seem otherwise, I am >*not* in any way affiliated with Sophisticated Circuits Inc. I *am* an >enthusiastic EE student who believes good designs deserve high praise, and >the PowerKey has proven itself to be a *very* good design. I forwarded your message to some friends who work for SCI, and they'd like to thank you for your praise. They had, however, one minor correction: >As the PowerKey's clock is derived from the line frequency, it's timed >power-on operation wouldn't be useful to you unless you were willing to do >some calculations to compensate for the 17% or so frequency difference in >your 50Hz environment. This isn't a problem. The software that comes with the PowerKey times the PowerKey's clock against the Mac's, figures out whether the line frequency is 50 or 60Hz, and compensates automatically. (If it's not one of the two, *then* you'll have this problem.) -- Gordon Davisson Westwind Computing (206) 632-8141 4518 University Way NE, Suite 313, Seattle WA 98105