+ Reply to Thread
Results 1 to 4 of 4

Thread: What kind of tube is this?

  1. #1
    Senior Member
    Join Date
    Apr 2003
    Location
    Covington, Ohio
    Posts
    622

    What kind of tube is this?

    Hello
    Just wondering if anyone has seen a tube like the one pictured here.
    My guess is that is some sort of a display tube, maybe neon in nature as it has no filiment that I can see but it is no where
    near as complex as a "nixie" display tube.

    In a diamond shaped logo there are the letters GR and the part number 1538-1 there may have been another number after the 1
    but I can't make it out.
    Under that number is the number 7405.
    If any one has any ideas let me know.

    Thanks
    Mike Caldwell
    Attached Images Attached Images  

  2. #2
    Member
    Join Date
    Oct 2003
    Location
    USA
    Posts
    32
    hi Mike -
    likely some sort of UHF/VHF radar tube from the looks of it. Perhaps something like WE 316A or something. Check www.duncanamps.com - good tube data sheet locator there.

    -Ed

  3. #3
    Senior Member Doctor_Electron's Avatar
    Join Date
    May 2003
    Location
    California Central Coast, USA
    Posts
    144
    For cool info on all manner of display tubes, from Nixies to extremely complex adaptations of TV camera tubes used to make mathematical computations,
    http://w1.871.telia.com/~u87149908/eyes/


    GR was General Radio Corp., later renamed GENRAD. They used to manufacture some of the finest test equipment and calibration standards gear.
    GENRAD was bought by TERADYNE Corp., makers of high-end ATE (Automated Test Equipment. TERADYNE have recently, by huge populat demand, brought back some of the classic GR gear such as decade resistors, decade caps, and the superb Strobotach. GR developed and patented the first VARIACS, "VARIAC" being a GR copyright. GR made the finest metered VARIACS for testing and lab use, with built-in (output voltage, output current, or volt-ampere) meters, Any combination of the meters was available. AC volts out metered types were the most common. Those with Volts out/Amps out/ & VA out metering were fairly rare, and very, very pricey. For example, a 1960's-made GR 10 amp VARIAC with a 0-140 VAC and a dual range, switch selectable 0-2 Amp / 0-10 amp meter can still fetch over $450.
    http://www-2.cs.cmu.edu/~ram/electro/gr/[IMG]
    Attached Images Attached Images  

  4. #4
    Senior Member
    Join Date
    Apr 2003
    Location
    Covington, Ohio
    Posts
    622
    Hello
    Thanks everyone for the the information!
    The GR logo is just like the one on the tube.

    Thanks again
    Mike Caldwell

+ Reply to Thread

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. What's your kind of music?
    By Hofmannhp in forum Music
    Replies: 52
    Last Post: 05-21-2006, 01:39 AM
  2. not even an L100 deserves THIS kind of treatment
    By GordonW in forum Lansing Product General Information
    Replies: 14
    Last Post: 01-16-2006, 08:49 PM
  3. Port tube availability ?
    By buzzmarr in forum Lansing Product Technical Help
    Replies: 14
    Last Post: 12-30-2004, 12:46 PM
  4. tube versus ss for jbl
    By angel mercado in forum Lansing Product General Information
    Replies: 18
    Last Post: 01-04-2004, 03:29 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts