Warhead, vibrato loophole, wizard wah and more...

[ckim715]

Maggotbrain= Screwdriver? That tone is to die for!

[JakeFuzz]

Maggotbrain= Screwdriver? That tone is to die for!

Thanks, I'm glad you like it. Yeah the exact setup is a Strat with a Dimarzio Area '61 bridge position > Vox V847 modded to Wizard wah specs > Screwdriver-ish on stripboard > Carbon Copy > Twin Reverb.

I settled on a lower gain (about 50-60) CV7112 for the NPN germanium in the screwdriver. I highly recommend the Cosmo, its probably been my favorite overdrive since i've built it. You'll definitely like it.

[ckim715]

I'm trying to trade my sunking board for a Cosmo pcb, hopefully someone is up for the trade. For your pcb, did you use ceramic caps?

[JakeFuzz]

I am sure someone would be down. You could make it on Vero too. Actually I am sure Keefe could etch you up an awesome Cosmo PCB.

I used all silver mica caps. I don't really remember why; I think I just had all the right values on hand. I also used a NOS TI BC108C with the gold leads, I am not sure if it makes any difference though. I did swap that position out with several different high gain transistors and I didn't notice any change.

[ckim715]

Oh and I'm curious, what was the chord progression on that loop? Mind if I use it? 

[JakeFuzz]

Oh and I'm curious, what was the chord progression on that loop? Mind if I use it?  

It is the actual Maggotbrain chord progression, don't know if it is in the right key though. I think I add and extra step in too. It goes.

C#m - B - C#m - B - G#m - A

[Bret608]

If you ever build a cosmo hit me up, I have these really low gain oc139's that would be perfect for a screwdriver (gain is around 45). You can just have one, I cant really figure out what to do with them other than this circuit.

Haha I guess I would kind of look like Freddy without that crazy stache, I don't know if that is a good thing though...
[/quote]

Wow, I had about settled on a Mangler for my first FF-type build, particulary after the advice you gave me on transistors. I really like the way the Screwdriver/Cosmo sounds in this clip though. Do you still have any of those OC139s available? I see Haberdasher is still making Cosmo boards as well...just doing the math here!