Using a switch to flip a transistor 180.

[SeaWitch]

Hey all!

I have weird fuzz layout that uses a 3904 transistor that actually works equally well when flipped 180 degrees from what the layout suggests.

It's a bit noisy, but enough that I like it.

I'm trying to figure how to implement a switch in order to flip this tranny EBC to CBE and vise versa.

Any help or guidance is very appreciated!

[Pavlos]

A moment of thought on this and without a diagram to aid me I think the following should work....

you only need to swap the collector and emitter around, base does not change so does not need any switch connections though a daughter board with flying leads might make things a little bit easier to manage,  so....

DPDT on-on switch

centre lug on each side (Pole) of the switch are the connections to the board, one side (Lug 2) to where the collector would normally go , the other (Lug 4) to where the emitter would normally go

link between lugs 1 and 4
link between lugs 3 and 6

these will look like a cross

connect the collector to lug 1
connect the emitter to lug 6

this is assuming the lugs are numbered like this

1  6
2  5
3  4

In one position the centre lug is connected to the pin above it and directly to the transistor, in the other position the centre lug is connected to the opposite side of the transitor via the link vi the bottom pin. In the first position the links do not make a connection to the transistor. I would think that switching will cause noise or popping so might be worth muting or turning down the output volume or amp beforehand.

[BetterOffShred]

SodaMeisermodified_crop_371x179.png

That should do it.  Base is the middle, collector and emitter either end.

[Pavlos]

then maybe I'm not a total idiotthanks for confirming that, thought it looked right but always good to have it confitmed