tn4148 not 1n4148

Discussion in 'General Electronics Chat' started by markosillypig, Mar 19, 2009.

  1. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
    184
    0
    hi i have got a circuit board that i want to reproduce for my little project
    but the problem is the diode on the board has markings of t4148
    i have used a substitute of a 1n4148 on it and it just dont work
    can any one help with this as i sed the markins on the diode are t4148

    thanks
    all
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    More information would help.
     
  3. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
    184
    0
    what info would you like
    ???
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    My guess is that it is really a 1N4148. Could you have installed it backward?
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    It would help a great deal if you could create a schematic of the circuit you are trying to replicate, and post it.
     
Loading...