changing a NPN to PNP FuzzFace

[pinkjimiphoton]

lol...pnp and npn are NOT interchangeable....and a layout and schematic are too different things. in the example you posted, the emitter is at the bottom. in the example i posted, one was one way, the other the opposite. an emitter is an emitter as a collector is a collector...but they don't always pin out the same. just because a 2n3906 and 2n3904 share the exact same pinout and order, that doesn't mean another transistor will. the mp16b's i've been using lately would be the opposite of the example you posted...and are ge. but not even all si trannys have the same layout. on the vero layout i did for my liberal komrade, i marked which holes in the sockets were for emitter and collector, as it's 180 degrees off from the more common ones...ay yi yi...i quit. you're right. who's on first? 

[LucifersTrip]

lol...pnp and npn are NOT interchangeable....and a layout and schematic are too different things. in the example you posted, the emitter is at the bottom. in the example i posted, one was one way, the other the opposite. an emitter is an emitter as a collector is a collector...but they don't always pin out the same. just because a 2n3906 and 2n3904 share the exact same pinout and order, that doesn't mean another transistor will. the mp16b's i've been using lately would be the opposite of the example you posted...and are ge. but not even all si trannys have the same layout. on the vero layout i did for my liberal komrade, i marked which holes in the sockets were for emitter and collector, as it's 180 degrees off from the more common ones...ay yi yi...i quit. you're right. who's on first? 

so, you're whole point has absolutely nothing to do with npn, pnp, silicon or germanium? just that different transistors have different pinouts?

[pinkjimiphoton]

this is the last time i'm posting in this thread.   

my whole point is that sometimes, as stated by others as well, dependent on the transistor, when converting an npn to pnp operation you have to swap the electros, diodes (if applicable) and transistors by turning them 180 degrees to make the circuit work.

clear now?

if not, that's cool...but this has gone far enough. you're not understanding the concept here, bro.

if, on the LAYOUT carboncopy posted you reverse stuff...not the schematic...depending on the pinout of the transistors used, you MAY have to reverse the order of the leads as shown in the circuit.  if you have e and c reversed, the circuit won't work.....but if using leaky ge transistors, it may still pass signal and sound really weak and farty.

got me now? lol

the pins stay the same, the function of the three parts stays the same, but the order and physical location doesn't stay the same necessarily. if you look at a layout with no experience, and the "bottom" pin needs to be emitter, and you switch to a different transistor where the emitter is on the "top"....ya gotta turn 'em around.


ok.

that said.

you are right unquestionably 100,000,000, %, oh sage one, and i am wrong, therefore i apologize profusely and am moving on...lol.

namaste 

i think it's coming down to the dif between understanding schematic symbols, and following layouts with little or no knowledge of the symbols used.

the part i don't get is where the breakdown in communication is coming from.

[LucifersTrip]

this is the last time i'm posting in this thread.   

my whole point is that sometimes, as stated by others as well, dependent on the transistor, when converting an npn to pnp operation you have to swap the electros, diodes (if applicable) and transistors by turning them 180 degrees to make the circuit work.

that's cool, because you've probably confused the OP by making him think that turning the transistors 180 degrees to make the circuit work is specific to converting npn to pnp....and by making him think that you always have to flip 180 when switching from npn > pnp ("you're gonna want to also make sure you've got the transistors reversed as well for the pnp version")...and by making him think that flipping 180 is the only possible solution, when there are other pinouts like ecb.

also, sometimes, when swapping an npn for a different npn you will also have to turn the transistors 180 degrees to make the circuit work, or use other pinouts like ecb.

the bottom line is when you swap ANY (npn, pnp, si, ge)  transistor for a different transistor, you may have to  turn the transistors 180 degrees...or even use a different pinout like ecb.

The Op asked "Do I just need to switch the polarity of the Electro Caps, and the flip GND and +9V rails"

The answer is: yes, and also make sure your pinouts match.

[sinthmart]

Recently I assembled a fuzz face on NPN Germany, with a minus in the power supply. And finally I got not just a regular, good fuzz, but a fuzz that sounds like early, imperfect pedals)). With the twisting, at will, of defects and flat sound, with crunch. I wrote all my new thoughts about this effect in the text to the video.

I just have one (stupid) question for practitioners, the classic fuzz face circuit does not have an electrolytic capacitor in the power supply. Can it affect the sound? Previously, such pedals, of course, were powered by a separate 9 volt battery, but now everything is different. Power supplies, several pedals. I thought, let it stand and soldered a 47 μF capacitor there, and then I thought, won't it hide those authentic sound defects that were inherent in the first fuzz faces?