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Thread: Transistor matching tester....help needed

  1. #1

    Angry Transistor matching tester....help needed

    Hi,

    I am constructing a Bedini SG and need help with the transistor tester I have constructed it and the meter needle does not budge no matter where I have the pot set or with the 27k resistor bypassed. I measured the voltage between the push button switch and the base of the transistor that will vary between 12 volts and 11.70 depending on the pot setting. I even tried reversing the transistor and the needle will move and the transistor will heat up. I can take a picture of what I have built.

    Thanks

    Ian

  2. #2
    Senior Member Ed_Morbus's Avatar
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    Ian can you make picture

  3. #3
    Here are a couple of pics

  4. #4
    am having trouble uploading pics will keep tying

  5. #5
    I have tried again to post a couple of pics but I get this red icon come up......,some kind of error message what other ways can I send you a pic

    Ian

  6. #6
    transistor tester 1.jpgtransistor tester 2.jpg Lets hope this the pics tried another method
    Ian

  7. #7
    Ian,
    Sorry I can't help with your transistor matching but how did you fix your picture upload? I am having the same problem on my post.

  8. #8
    Hi Bob,
    Yes it was a bit of a pain for as I have not been on forums for a while click in the immage icon that brings up a box with options, in the bottom right hand corner there is a "basic uploader" that is what I ended up using.

    Ian

  9. #9
    Testing upload pic

    4Crun1charge.jpg

    *Edit*

    Many thanks Ian,,worked like a charm!

  10. #10
    Schematic1.JPGMJW21194-pinout.jpg

    I cant tell from you pics but it looks wrong to make things easier ..leave out meter and push button switch
    if you flipped the transistor it may be bad
    i dont see a ne2 $(KGrHqJHJBgE8e6)BkfHBPJUnmo4z!~~60_35.JPG
    more pics will be helpful
    i dont see any diodes either
    if you are building a trans tester then disregard all i said
    i test trans with dmm https://www.youtube.com/watch?v=b0jCUsenNsY
    if you have a diagram of what you are building post it
    Last edited by guyzzemf; 02-14-2015 at 03:10 PM.

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