2N3055 Power Transistor Test

I show how to test a 2N3055 power transistor using a Digital Multi meter.

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[owenlaprath]

NICE and simple video! FYI for all new to electronics: This test is for an "NPN" transistor, where the emitter needs negative potential applied. For any PNP transistor, you need to reverse the leads and apply positive voltage to the emitter instead

[wakzy]

If the transistor tests okay, according to your method, it also is a method to determine the EBC pins on an unknown transistor. Been at this for 50 years and your test is new to me. Thanks a lot.

[vmukal]

Excellent video - your explanations are clear and the filming was also spot on. I have several 2N3055s that are over 40 years and and did not realize a quick and simple test would determine any bad ones.

[ddembicki]

Brief and with laser precision to the point. A+

[douglasbollinger]

The 4 megaohm position, so not the diode mode?

[clems]

Also, Use the diode test function of the DMM, Testing each of the PN junctions of the transistor. [ B-E and B-C]

[DocBen]

Congratulations man, you're a good teacher. It's very cool.

[Ben-Dedia]

how about MJ15004 transistor think is same messurments or way doing thanks good video

[williamguillen]

I got the same multimiter 20 years ago. I use a diode scale. Base colector, base emiter watching polarity, this old multimeter can measure hFe also. Is the simplest way for me.

[robertjohnson]

This is a great video! --- I did not know how to check a transistor --- NOW I KNOW HOW ---Thank you very much for your clear explanation along with the great video!

[scamper_van]

well thanks for the video since i didn't actually knew how to identify the various connections.. on this specific type of transistor...
since i will use a few of the for a step up booster well knowing how to identify Collector Emitter Base!!!

[AThreeDogNight]

Nice way to check them out. Wish you would zoom in a little more for us old timers like me who can't see very well anymore even with our binoculars on, just kidding they are bifocals.

[joelbeaudette]

I have two 2N3055 (Motorola) both have tested good on diode mode base-collector and base-emetter. So signal on reverse path. BUT one of them i am not capable of reeding resistance before and after shorter base to collector and the one is good I am reading is 19Mohms ans shorted is 11Mohms...

Is this a good sign?

[toddhuber]

I've got 2 similar ones on an EMC G110 guitar amp that need checking.... thanks for the info👍

[josemendoza]

felicitaciones es el MEJOR video de como comprobar los trancistores

[billygo]

I am doing the same thing and I am getting continuity between emitter and collector in one of the two and in the other ( both st 4917070) I am not getting any readings when shorting base with colector as in the video.

[bucyruserie]

Thanks, I had no idea how to check them... I have a question if you happen to read this, I have an older (1970ish) Sansui 5050 stereo that I think the output transistors went bad on. (if the volume is turned all the way up, there is a very faint signal going to the speakers) I have a couple of sets of output transistors that came in a box of stuff, I don't know if the numbers are the same (I would doubt it), can I just put those in the stereo? Or not a good idea? Tom

[shoaibsiddiqui]

In my case reading comes and goes not hault, is it faulty transistor?

[mechanicantiquesrestoratio]

Can you show the someday ! How the AC (127_128_188_187 etc )series transistor test ?
Thank you

[talonmain]

How did he know the range needed to measure the transistors?