Unijunction Transistor

Discussion in 'Homework Help' started by dgr, Jul 25, 2004.

  1. dgr

    Thread Starter New Member

    Jul 25, 2004
    1
    0
    what are unijunction's defects and how to test it?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    Your question is a wonderful straight line, but I'll resist...

    Like most other discreet semiconductors, they either open up, or go short. If you have a diode test function on your meter, you check for two PN junctions. The leads are base1, base2, and emitter, but I can't reacall the pin-out. I think they're all still in TO-18 cans, and probably left around since 1969, or whenever they ran off the last lot of 2N2646's.

    Actually, I had an oven that used a PUT in the temperature controller. It's just that conparators work so much better.
     
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