Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!husc6!mit-eddie!uw-beaver!tektronix!teklds!midas!jeffw 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.