Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!amdcad!ames!hao!gatech!bloom-beacon!mit-eddie!uw-beaver!cornell!rochester!PT.CS.CMU.EDU!SPEECH1.CS.CMU.EDU!phd
From: phd@SPEECH1.CS.CMU.EDU (Paul Dietz)
Newsgroups: sci.electronics
Subject: Re: Running 120V AC equipment off 240V AC.
Message-ID: <892@PT.CS.CMU.EDU>
Date: 18 Feb 88 16:10:20 GMT
References: <204@unh.UUCP> <1988Feb15.153838.5619@utzoo.uucp> <701@uthub.toronto.edu>
Sender: netnews@PT.CS.CMU.EDU
Organization: Carnegie-Mellon University, CS/RI
Lines: 16
Keywords: line frequency 50/60Hz

In article <701@uthub.toronto.edu> koko@uthub.toronto.edu (M. Kokodyniak) writes:
>Appliances that do care about line frequency (since some have
>induction or synchronous motors):
>	some digital clocks (except those with battery backup)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I can't speak in general, but my digital clock sync.s to the 60Hz (or cps,
if you insist...) when it's available, and reverts to a very crummy battery
powered RC osc. otherwise. (Also, trying to run at ~60 Hz, but not doing
a very good job. Gains about 15 - 20 minutes per hour when runing on backup.)

Paul H. Dietz                                        ____          ____
Dept. of Electrical and Computer Engineering        / oo \        <_<\\\
Carnegie Mellon University                        /|  \/  |\        \\ \\
--------------------------------------------     | | (  ) | |       | ||\\
"If God had meant for penguins to fly,             -->--<--        / / |\\\  /
he would have given them wings."            _________^__^_________/ / / \\\\-