Red Ranger / Mucho Rojo Q3 conundrum

Started by inverseroom, March 12, 2005, 02:26:10 PM

Previous topic - Next topic

inverseroom

Has anyone built this booster from the Tonepad site?  There's a seeming discrepancy between the layout diagram and the schem that I'm wondering about.  Q3 is a 2N5087, and on the diagram it's pictured with the flat side facing left.  This puts the collector facing the bank of switches and the emitter facing R5 and the power rail.  On the schem, however, the collector seems to be on the power rail.  I'd go with the schem (I realize different transistors may have a different physical configuration) except that the arrow on the transistor symbol there seems to be facing IN rather than OUT--I thought the arrow generally referred to the emitter and always faced out.  So in this case the arrow would mean the collector...  Anyway, either the arrow is facing the wrong way or the flat side on the layout diagram is.

Am I a idiot?  The collector should get the power, right?

inverseroom

Or... is it that the arrow on the schem refers to the direction of power, not the emitter or collector...?

inverseroom

Wait... wait... I think I have it!  Re-reading the FAQ did it of course.  NPN and PNP transistors have totally different designations in the schem.










:oops: