I had to turn them only once, after I figured out that they were
inversed. But I guess it's not my fault, or the only fault is not
measuring them and trusting the datasheet from Philips. What should I
learn from this ? Don't trust the datasheet for transistors and measure
all of them.

Lucian

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Shahid Sheikh
Sent: 18 mai 2004 09:42
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: Transistor Problem

Had to do the same thing with a FET (2N5116) a few years ago. Turned out
different manufacturers had different pin-out for the same transistor in
the same package. The prototype worked fine. The production boards were
having weird problems. Had to recall all pcbs to fix this. Painful...

Shahid

-----Original Message-----
From: David VanHorn [mailto:dvanhorn@CEDAR.NET]
Posted At: Tuesday, May 18, 2004 8:18 AM
Subject: Re: [EE]: Transistor Problem


At 11:56 PM 5/17/2004 +0300, Lucian wrote:

>Thank you for your answers.
>I have managed to change all the 11 transistors and it proved that they

>were CBE instead of EBC. From now on, I will measure every transistor I

>solder to avoid the pain of getting them off and inverting them.

I bet your gain figure went up dramatically! :)

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