few questions about the TB MKII

[tareqx2]

I'm going to be building the ToneBender MKII in a couple of hours, but i want to be sure I know what i'm doing so i don't burn out the transistors. Basically, since the schematic is negative ground, the only difference is that the battery is backward, right? I would just have the positive end of the battery straight to the ring of the output right? Anything else i should keep in mind? Thanks.

[Pedal love]

negative ground should have the the positive to the battery supply and negative to ground, all elecrtrolytic caps should be negative to ground. its the complete opposite for positive ground.

[tareqx2]

I'm going to be using this schematic...

[Pedal love]

all your positive in the schematic need to be grounded that means battery positive to output ground/all ground points. The negative is b+/voltage applied. Elecrolytic capacitors are all positive grounded.

[Derringer]

what kind of transistors are you using?

if they're silicon then you may have to alter how Q1 is setup ... it's not a big deal ... I or someone else can point you in the right direction if need be.

[tareqx2]

I got the Germanium PNP transistors from smallBear so i think that schem. is right. Thanks though.

[Derringer]

yup, you should be good to go

I always like to breadboard stuff before I build it just to get a feel for how everything is laid out and works

[Electric Warrior]

consider that the OC75 version used a 10k at Q1's base and 47k at Q2's collector. the small bear set might be closer in spec to OC75s than to OC81D audio drivers.

[Derringer]

I've yet to take the germanium plunge


all Si thus far ... no complaints