Can you identify this part?

Discussion in 'General Electronics Chat' started by jr102893, Jan 20, 2011.

  1. jr102893

    Thread Starter New Member

    Jan 18, 2011
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    0
    this side says: Toshiba
    [​IMG]
    the back says: 5886
    [​IMG]
     
  2. tracecom

    AAC Fanatic!

    Apr 16, 2010
    3,869
    1,393
    http://www.ominous-valve.com/images/ray5886.jpg

    "Submini JAN CK-5886, from a radiological survey meter (nuclear fallout detector) once bought by Civil Defense and nuke plants. The tubes that tested under one FEMTOampere for leakage were connected as triodes in ultra-high impedance ion chamber amps. That's an enormous US 10-cent coin next to this little guy."

    Just a Google guess on my part.


     
  3. jr102893

    Thread Starter New Member

    Jan 18, 2011
    15
    0
    interesting but i wonder if its the same part since it was from a spectrophotometer.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    A 5886 is an electrometer tube. They were common in vacuum gauges as well. Anything that needed 10^15th input resistance used them.
     
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