Path: utzoo!attcan!uunet!iscuva!jimc
From: jimc@iscuva.ISCS.COM (Jim Cathey)
Newsgroups: comp.sys.mac
Subject: Re: euro power mac info needed
Message-ID: <2151@iscuva.ISCS.COM>
Date: 8 Nov 88 17:25:28 GMT
References: <984@naucse.UUCP> <679@stech.UUCP> <16643@agate.BERKELEY.EDU>
Organization: ISC Systems Corporation, Spokane, WA
Lines: 25

>The SE (and the II) have "switching" power supplies. That means that
>they will automatically switch between 110 and 220; they can also
>automatically work with either 50 or 60 Hz. The plus will not do this.

A nit:

Using conventional terminology, _all_ Macintoshes have switching power
supplies.  This term refers to the type of circuitry used to implement
the power supply.  It is possible to design a switching power suppply that
does not care whether it is fed from 110 or 220 volt mains.  Apple has
chosen to do this for the SE.  Another term should be used to describe
this (dare I suggest 'universal switching power supply'?)

It is also quite possible to design a non-switching power supply that
does not care whether it is fed from 110 or 220.  (Not necessarily
efficient or cheap, just _possible_.) 

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