Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!phri!roy
From: roy@phri.nyu.edu (Roy Smith)
Newsgroups: sci.electronics
Subject: Re: Ring signal generation (was DTMF Decoder IC)
Message-ID: <1990Oct11.235105.5131@phri.nyu.edu>
Date: 11 Oct 90 23:51:05 GMT
References: <14793@mentor.cc.purdue.edu> <27114b84-483.1sci.electronics-1@vpnet.chi.il.us> <14913@mentor.cc.purdue.edu> <9770@uhccux.uhcc.Hawaii.Edu> <1990Oct11.013436.6335@phri.nyu.edu>
Sender: news@phri.nyu.edu (News System)
Organization: Public Health Research Institute, New York City
Lines: 12

I wrote:
> Use the 115V 60 Hz mains to drive an N-pole synchronous motor.  Couple the
> shaft to a 3N-pole 90V synchronous generator [...] and out comes [...] 20 Hz

	Aaarrrggghghg!  That'll produce 180 Hz.  What I meant to say
(honest :-)) was use a 3N-pole motor driving an N-pole generator.  So, how
come nobody flamed me for my error yet?
--
Roy Smith, Public Health Research Institute
455 First Avenue, New York, NY 10016
roy@alanine.phri.nyu.edu -OR- {att,cmcl2,rutgers,hombre}!phri!roy
"Arcane?  Did you say arcane?  It wouldn't be Unix if it wasn't arcane!"