Transistor pinout (or transistor base diagram) information for the older Qs in TO-3, TO-5, TO-18, TO-92, TO-220, etc. packages that the electronics hobbyist might have in his junk box is not an easy find on the Internet. So here's some help:
This
is an enlarged copy of a little
info. sheet that came with some Qs that I bought many years
ago from one of the surplus suppliers.
Links
to other pinout information recently found on the Internet:
Another image of transistor bases similar to
the one
above
This one includes some voltage regulators and the 555 Timer
A PDF file of transistor base diagrams
-
This is a download in most browsers
Pinout information arranged by TO and SOT
numbers - Quite comprehensive
Big chart - mostly European types by
transistor number
Smaller chart - Mostly European types by package type
Some European and Japanese ones
A few more - Scroll down a few pages to just before the Contents listing
Limited
to TO-92 and TO-3 information
The NTE searchable catalog - a
two-step process but excellent
Finally,
if you can get your hands on a Radio Shack Electronic Components Tester
- Catalog # 22-330 you will have an
excellent little test device that will find the pinout information for
transistors, FETs, diodes, SCRs and LEDs and identify whether the
device is good or bad.