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From: rsd@sei.cmu.edu (Richard D'Ippolito)
Newsgroups: sci.electronics
Subject: Re: Power supply design
Message-ID: <27480@as0c.sei.cmu.edu>
Date: 21 Jun 91 13:06:40 GMT
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Organization: Software Engineering Institute
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In article <1991Jun20.182012.10847@ux1.cso.uiuc.edu> Charley Kline writes:

>  But transformer secondaries are set
> given the "average" primary voltage of 117V, and it could slip as low
> as 105V and still be power company legal, so multiply 14.29 * 117/105
> to get right about 16Vrms for the secondary.

Minor nit: power-company legal is 120V +/- 10%, so you have to deal with 108 to 132 volts.

Rich

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