Is there a build pictorial for a PNP Pedal?

[Henry89789]

I saw the beginner's  threads re:  the NPN Boost.   Is there something similar to show the changes that should be made when building a PNP pedal such as the Germanium fuzz face?

[darron]

good question.


whenever i need to refresh wrapping my head around using PNP and especially PNP with negative ground I like to double check my work by looking at tonepad.com 's layout and schematic for the PNP fuzz face. carefull with negative ground though, the guys here will try to talk you out of it...


http://tonepad.com/project.asp?id=38

check out the layout PDF on that page...

[petemoore]

  Yup, use a PNP Pos Gnd. for your PNP Ge's or risk your oscillation/troubles with Neg supplied/inverted FF...
   Nope, Neg and Pos can't share the same power supply because connecting +/- equals a direct short condition.
  Max1044 or other voltage conversion can fit on a small internal board and allow plugging the supply of the FF to a 'regular' supply with other NPN/Neg Gnd. effects, otherwise it's a battery or other dedicated PS for the +ground supply circuits.

[DavenPaget]

  Yup, use a PNP Pos Gnd. for your PNP Ge's or risk your oscillation/troubles with Neg supplied/inverted FF...
   Nope, Neg and Pos can't share the same power supply because connecting +/- equals a direct short condition.
  Max1044 or other voltage conversion can fit on a small internal board and allow plugging the supply of the FF to a 'regular' supply with other NPN/Neg Gnd. effects, otherwise it's a battery or other dedicated PS for the +ground supply circuits.

A good replacement ( cheapest ) would be TC1044SEPA at UK's Farnell . I haven't checked anywhere else .