Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!rutgers!sunybcs!kitty!larry From: larry@kitty.UUCP (Larry Lippman) Newsgroups: sci.electronics Subject: Re: Those magic eyes Message-ID: <1861@kitty.UUCP> Date: Tue, 21-Jul-87 10:13:14 EDT Article-I.D.: kitty.1861 Posted: Tue Jul 21 10:13:14 1987 Date-Received: Wed, 22-Jul-87 07:28:51 EDT References: <1002@me.ri.cmu.edu> Organization: Recognition Research Corp., Clarence, NY Lines: 37 Keywords: stone knives, and bearskins Summary: The 1629 is an industrial/military equivalent of 6E5 In article <1002@me.ri.cmu.edu>, berman@me.ri.cmu.edu (Steven Berman) writes: > Since there seems to so many people out there that know about magic > eye tubes, Does anyone out there know what equivalent number > matches 1629? I have what looks like a 6E5, based on the picture > on page 53 of the RCA receiving tube manual (yes, I really own one!!). > But my tube stubbornly calls itself 1629. I really want to build > a project with this tube, but I need the pin-out and specs before I can > build it. As far as I know, the 1629 is electrically identical to the 6E5, but is an industrial/military equivalent in an octal base (the 6E5 is a 6-pin base). While I don't have the exact electrical specs for the 1629 handy, I do have the pin-out data from a tube tester reference manual (don't laugh - we still have a tube tester buried in a storeroom!): Plate = pin 2 Grid = pin 5 Cathode = pin 8 Target anode = pin 4 Filament = pins 2 and 7 Pin 1 has no connection, and pin 6 is physically missing > Any suggestions are greatly appreciated (especially about > possible low-cost power supplies). I would use a transformer with a secondary of 175-0-175 volts @ 0.025 mA and 6.3 volts @ 0.5 A. Use a couple of 1N4007 or equivalent diodes and a pi-type filter using a resistor as the series element. This should be good enough without any regulation, although if you want to be a purist about it, there are many inexpensive TO-220 power transistors with a Vceo of 300 volts to use for a series regulator. If you are going to regulate, go for 200 to 220 volts. <> Larry Lippman @ Recognition Research Corp., Clarence, New York <> UUCP: {allegra|ames|boulder|decvax|rocksanne|watmath}!sunybcs!kitty!larry <> VOICE: 716/688-1231 {hplabs|ihnp4|mtune|seismo|utzoo}!/ <> FAX: 716/741-9635 {G1,G2,G3 modes} "Have you hugged your cat today?"