How do you tell PNP from NPN

[Neil Morrison]

----- Original Message -----
From: <multi-volti at MULTI-VOLTI.COM>


> The base is only the middle lead on certain transistors. On many
it's at one
...
>
> Many DMM's (notoriously Radio Shack in the 1980's and I don't
remember who
> else's) had the red lead as negative for ohms (by + or - for ohms I
mean the
....

In my experience, the majority of all multimeters have positive
voltage on the negative lead when running in ohmmeter mode. RS have
done many bad things, but this one isn't exclusively theirs. BTW,
many DMMs have a diode test which is useful for this test.

Neil

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