Hitachi Rangemaster Transistor

Started by DanyoSound, June 15, 2006, 07:53:14 PM

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DanyoSound

I'm a beginner, and I've found some posts that ask the question I have, but I haven't found a definitive answer.

I have the Hitachi PNP transistor 2SB77 and I can only figure the base.  On the right site of the text (to the right of "Japan") there is a triangle pointing downwards, so I'm guessing that the corresponding lead is the Emitter. 

So from left to right, it would read

Collector, Base, Emitter

But I have read that

EB > BC

In all of my DMM tests the reverse is true (Diode tests and resistance tests)

Diode Test
BE = 0.160 
BC = 0.169

Resistance Test
B+ E- = 6.7
B+ C- = 10.2

B- E+ = 4.3
B- C+ = 5.4

So my question: do I trust the downward triangle on the transistor, or do I trust the readings?

I ask what seems to be a simple question because I'm a beginner and I'm afraid I may have overlooked something.

One further bit of information.  I first tryed soldering the transistor without a heat sink, because I couldn't figure out what that was.  Now I know!  So I'm afraid I may have fried the transistor.  So a second question is:

Are the those readings normal, or do they look like the readings of a fried transistor?

Thanks for your patience.

Danyo


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DanyoSound

It appears as if I'm not crazy, and my readings were somewhat accurate.  Thanks friend.  Thanks internet.