-ve ground with PNP transistors

Started by dubs, March 21, 2004, 07:16:15 PM

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dubs

Hi there,
I wish to build a coloursound tonebender using PNP ermanium transistors.
Is it possible to build one with negative ground? How do I go about this?

petemoore

And considerable research...it seems Dunlop is using this scheme on the New FF's? That's what I gathered from the Recent thread started by Zachary Vex.
 Uh as for how to make that work I don't know that it's understood, or haven't seen any explanations...all the posts of these type builds I saw got working by being converted to PNP pos ground.
 One recommendation for experimentataion: use easily substitutable transistors till you figure out how to get it going before putting in your 'dinosaur egg' germanuim finds to avoid damaging them.
Convention creates following, following creates convention.

phillip


petemoore

I haven't seen that one 'till now...interesting!
 Looks like the transistors are 'upside down' as the supply polarity...These are PNP emitters where the Collectors [and vice versa] 'would' be in a
  PNP pos ground Tonebender?
Convention creates following, following creates convention.