[sdiy] BC 547 / 2n3904 and lead reversal?

[Scott Gravenhorst]

jamos at technotoys.com wrote:
>OK.. I just ordered a bunch of transistors to stuff in my Catgirl Synth
>boards.. (I figure I'm not _really_ going to get moving on that project
>until next year, but I think soldering boards would be a nice, mindless way
>to escape from the stress of raising a two-year old, now and then)
>
>Anyway: on Ken's site he mentions that the 2N3904 can be substituted for
>the BC547, and the 2n3906 for the BC557 - but he thinks that the
>substitutes might have reversed leads. I'm sensitive to this, because I
>just botched a TR-909 repair for this very reason (Hi Trevor).
>
>Can anyone confirm or deny that the leads are reversed on these
>transistors?

curve to the back leads pointing down:

BC557

C B E

2N3904

E B C

Looks like putting it in the opposite way works great, no transistor lead
origami.




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