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From: jeffw@midas.TEK.COM (Jeff Winslow)
Newsgroups: sci.electronics
Subject: Re: "Magic Eye" tubes (really magamps)
Message-ID: <1652@midas.TEK.COM>
Date: Fri, 24-Jul-87 12:34:51 EDT
Article-I.D.: midas.1652
Posted: Fri Jul 24 12:34:51 1987
Date-Received: Sat, 25-Jul-87 18:11:45 EDT
References: <1495@frog.UUCP> <35ffa63b.b8ab@apollo.uucp> <6@spar.SPAR.SLB.COM> <591@inuxh.UUCP> <1871@kitty.UUCP>
Reply-To: jeffw@midas.UUCP (Jeff Winslow)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 19

In article <1871@kitty.UUCP> larry@kitty.UUCP (Larry Lippman) writes:
>In article <591@inuxh.UUCP>, rmrin@inuxh.UUCP (D Rickert) writes:
>>              I think we may have even had a mag amp somewhere in
>> the circuit (you know, solid state Neanderthal style).
>
>	Magnetic amplifiers!  I haven't run across those gadgets for servo
>control in years...

Hey, don't laugh. Magamps are still commonly used in switching power supplies,
especially multi-output switchers, for regulation of outputs with currents
too high to be efficiently regulated with a series-pass regulator. Of course,
they tend to be a bit smaller than those Neanderthals of yore - we're talking
40kHz and up, here.

						Jeff Winslow

PS. Sci.electronics folk, please edit the #$*&^#@ newsgroup line so these
things don't go over to talk.bizarre!! They seem to be ignoring us so far,
but take it from me, they can get really nasty! I know, I'm one of them.