I'm a novice.
I'm trying to test NTE108 transistor. I found a little circuit that is suppose to test transistors. See diagram below or link.
To test a PNP transistor use the same circuit but reverse the LED and the supply voltage.
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The problem is that when I try to test my 108 it seems to work in the reverse. That is when Emitter is on C and Collector is on E the touching of the 10k Resistor to the 9volts turns the led on. If I connect it up the way the diagram shows me the LED just comes on and stays on. If I connect the
10k to the 9v the light gets a little brighter.Presumably the problem is that I have the orientation wrong. But when I look at the data sheet I could swear I have it right. I'm afraid I find it a little confusing specially with the fact that it appears that there are at least 3 packages that look the same and have different pin outs eg. TO92A, TO92B, TO92C. I sort of wish that the data sheets would give a 3d diagram. The diagram seems to show two double lines || || to indicate the rounded side of the transistor.(I assume) So looking at the transistor that way the orientation is ||EBC|| . (looking straight on rounded side pins down)
Thus I think mine the NTE-108 T-NPN SI RF/IF/VID AMP is as follows holding the transistor by the pins. Legs down in front of me and with the flat part with the writing away from me and the round part toward me E B C. or looking straight down at the transistor and the pins sticking up in the air with the flat part away from me C.B.E.
Can anyone point me in the right direction. Am I wrong in my orientation, and is the circuit for testing transistors wrong. It works in complete reverse for me.
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