Switching from PnP to NpN

[killerkev]

I would like to change the PnP trannies in a fuzz pedal to NpN. Beside the flipping the pos. & neg. power source, do I need to do anything with the electrophilic capacitors that are on the board?

[oldrocker]

Yes.  You'll need to swap around all polarities on the electro caps too.

[aron]

This is in the FAQ - please check it out if you haven't. :-)

http://www.diystompboxes.com/wiki/index.php?title=DIY_FAQ

[petemoore]

  A good demonstration of the differences in polarity are shown at GEO, Green Ringer.
  Capacitors [Polarized need to have their - side be more negative than the + side
  Diodes [Have markings, on the schematic the arrow>line corresponds to the line around the diode body
  Transistors [note the arrow in the circle changes direction for NpP to pNp]
  DC power source [needs to have an appropriately assigned polarity
  Notice how every polarized component has reversed polarity.
  All polarized components and their schematic symbols *should show polarity when needed, rare if they don't.
  Resistors have no polarity