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How to test a TRANSISTOR with a multimeter PNP or NPN MF#63

How to test a TRANSISTOR with a multimeter PNP or NPN MF#63



how to test a silicon transistor with a multimeter using the diode function. and how to tell if it is a PNP or NPN and find the Base.
Please help support further video's on www.patreon.com/markusfuller

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Tags: transistors

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31 Comments

  1. Date: January 24, 2016 at 13:56
    Author: Steve Saferat

    Thank you so much for your video here..:-) Would you know what i should use as a substitute for a 2SC2130 NPN ?

  2. Date: January 31, 2016 at 09:23

    Can you make a video showing how to match, or pair transistor for ladder filters, or expo converters for VCO?
    It's very important topic for synth builders.

    I like you work, greetings from Poland 🙂

  3. Date: February 10, 2016 at 09:45
    Author: derren wri

    i do something eles , light tester with pnp, npn and with between flashing is ok, stay on means no good of the light
    on bread broad guess.

  4. Date: February 18, 2016 at 13:24
    Author: nihonam

    Cheap chineese transistor testers show all stuff at once =)
    But as a child i've read how to test tr-r with just an ohmmeter, old analog one, with pointer, not digital. The essentials are in this video, but it also said that collector has higher impedance.

  5. Date: February 23, 2016 at 15:55
    Author: sam cogger

    Really enjoyed this video, would really love to see some circuit analysis into transistors

  6. Date: February 27, 2016 at 18:48
    Author: Jan sædal

    you could add into this video that the highest resistance between the two diodes (BE-BC) is the Emitter. If you measure in Diode mode on your multimeter, the highest Voltage is the Emitter. The Emitter is heavily doped, That's why the BE is higher than the BC. Then you know all pinouts .

  7. Date: August 5, 2016 at 22:12
    Author: Nodrog Awson

    That was very useful, never pictured it that way before.You made that very easy to understand.
    Thank you for sharing.

  8. Date: November 30, 2016 at 13:08
    Author: Bob Boisen

    Thanks for both your clear demonstration and your direct approach.

  9. Date: January 27, 2017 at 21:32
    Author: snaprollinpitts

    excellent video thanks, a thumbs way UP and a sub from me. thanks I'll be back!!!

  10. Date: June 19, 2017 at 19:49
    Author: Readme .txt

    What if your red probe cable is connected to negative battery pole, and your are completely wrong? How can you be sure which indicates positive?

  11. Date: June 20, 2017 at 15:34
    Author: Steve Hiller

    15 seconds into the video, had to pause and comment: I LOVE YOUR WORK STATION. I get to work in a big High-Voltage Lab at Uni; but your set-up is simple, organized, and efficient.

  12. Date: July 1, 2017 at 00:47
    Author: Hugo Antão

    how to identify the Emitter and the Collector on NPN and PNP transistors?

  13. Date: July 13, 2017 at 10:17
    Author: Owat Thorne

    thanks very simple and easy to understand. can i test where is collector pin and the emitter pin using diode test?

  14. Date: August 31, 2017 at 14:28
    Author: LearningZone

    What an excellent video! I got a nice idea to upload such kind of video on my channel also. Great work.

  15. Date: October 3, 2017 at 11:05
    Author: mike young

    Why are you terming connections with a reading as negative.

  16. Date: October 19, 2017 at 07:59
    Author: Rey Uy

    Thank you your video is very helpful now i understand how to identify pnp and npn,,,,
    Im confuse the other video but your video is very easy how to understand pnp and npn thnk you god bless u..???????

  17. Date: October 27, 2017 at 21:55
    Author: AmIonArock

    great vid, I found my bad transistor. But now I what can I replace it with? These Baldwin part#s are not anywhere on web. I have discovered The "Ray" on the top of the transistor s is probably  made by Raytheon  and I found two different part numbers used for what was just suppose to be one item? But neither the "T59285-6412" OR "1396A-6404" part numbers for transistors  shows up on the net.  I got to admit, I know  how not to get electrocuted but other than that I'll be the first admit. I'm slow. I try to pound this stuff into my head to try to learn it, but every corner I turn.  I don't know what street I'm on when comes to theory and what make this stuff tick.  But something happens to me when I see an old amp or something with tubes or this old organ. Like yeah I'll take it.  But this sucker weighs a ton.  It was in the back of my car for almost a week. and I just drove my wife car so I wouldn't dislodge anything.  And now this thing is sitting in the middle of my studio.  I got get it working or the… worse.  I always been against it, Because I truly do believe we must try to preserve this historical things  but I will be forced to gut it  a first for me. Sorry Mark for the testimony. 
      Do you have a suggestion what I can use to replace this Transistor with. I have three more tone Generators after this one to fix. I found something that says these transistors are "PNP"
    Thanks
    AmIOnARock

  18. Date: November 11, 2017 at 07:34
    Author: Jan Zumwalt

    I watched 5 or 6 other YouTube videos before finding yours, this is the best! Thank you very much! Without the graphics I would have missed the point!

  19. Date: November 12, 2017 at 19:20

    I burned up my pnp transistor can I make one with 2 diode and one electrical line in middle please let me know thanks

  20. Date: December 30, 2017 at 02:37

    Markus,
    thank you so much for this simple explanation.
    I have recently finished a DIY modular "kit" (it's a Serge Synth) and had to solder a single SMD part: A matched pair transistor. After soldering it on with a way too big soldering tip I was pretty sure I destroyed it. After watching your video, I checked its six tiny feet and voila, there is only current coming from one P to two Ns on both sides. Until I can finally check it (the Output module pcb of all things is currently out of stock and will be sent in a week or two) I will remain fearful I'll have to resolder that transistor after all, but now I can sleep a lot better until then!

    …Also, your videos made me interested in DIY synths in the first place. Opening up those machines is just way too exciting. Please continue making videos on your channel in 2018!

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