Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!husc6!mit-eddie!ll-xn!ames!ucbcad!ucbvax!decvax!decwrl!sun!imagen!kchen From: kchen@imagen.UUCP (Kok Chen) Newsgroups: sci.electronics Subject: Re: "Magic Eye" tubes Message-ID: <1345@imagen.UUCP> Date: Mon, 13-Jul-87 20:31:04 EDT Article-I.D.: imagen.1345 Posted: Mon Jul 13 20:31:04 1987 Date-Received: Wed, 15-Jul-87 03:44:50 EDT References: <1004@speech1.cs.cmu.edu> Organization: Imagen Corp., Santa Clara CA Lines: 27 in article <1004@speech1.cs.cmu.edu>, phd@speech1.cs.cmu.edu (Paul Dietz) says: > > What exactly is a "Magic Eye" tube? (I think I'm showing my age, or lack > thereof...) > Overheard the other day: "I'm so old, I even remember when calculator > displays were LED!" ^^^^^^^^^^ ^^^^^^^^ OK, who remembers Nixie tubes? (Any old fogies from Wang and Burroughs still alive? :-) :-) By the way, for Magic Eyes, you may be able to find Mullard and Philips EM80 valves (used in wireless hacking in the early 1960's! A poor high schooler's S-meter.) Also, you may be able to get the Magic eye tube that was used in the Dyna (Dynaco) FM-3 tuner from Stereo Cost Cutters in Ohio. (They advertise in low-end "hi-"fidelity magazines.) Unlike the better classical Cats-eyes, where you look into the *end* of the valve cylinder and see two rays (with different sensitivities, so that one ray would close before the other, with greater applied grid bias), the one on the Dyna tuner has it's florescent target on the *side* of the valve. Instead of the dark ray(s), you have a single dark band that opens and closes. Kok S. Chen ..!decwrl!imagen!kchen Imagen Corporation