Debugging 1969 boutique fuzz

[jorgenkjellgren]

Hi!
Well, having succesfully debugged my silicon fuzz (thanks to some of you guys ) I gladly went on to my 1969 boutique fuzz. Built on stripboard using the layout in the Dragonfly gallery.

I was suspicious of the soldering so I looked the joints over and redid some of them.
Funny thing: Volume works, bias works, contour works BUT IT WON´T FUZZ!

I get good volume and the bias and contour both seems to work (tone alters when twisted).
When I set the fuzz to max I get a pretty good clean boost. I have tried two different sets of transistors with the same result.

Also, the trimpot doesn´t seem to do anything. I read another post about there being something wrong eith the layout with the trimpot and a jumper.

I currently power it with a wall-wart.

Help, please!!
Jörgen

[R.G.]

Incorrect resistor value?

Transistor pinout (they work with very small gains when you hook them in backwards).

[jorgenkjellgren]

I´ve checked the resistors and they seem to be right. I have also tried the trannies put in both ways.
All I can say is that it felt like I hade them the right way in from the start. There was a little difference in sound. Putting the trannies in on way sounded more "wrong" if that makes any sense?

Any other suggestions?

Thanks, Jörgen

[petemoore]

   You can measure each resistor on a FF, in circuit I believe.
  Voltage measurements might help, but since it's a 1 gain stage circuit, debugging it is mostly just a get it wired right affair.
  I go dogmatic on FF's, measure each resistor, then set DMM to test for continuity where I want non continuity, test all grounds continuity, I always test for non-continuity between V+ and V_ before installing battery [so it don't get hot and burn up].
  Basically testing every which way I can to find anything in my wiring that isn't shown on the schematic...and on every FF, it's one thing. Or the other, other...
  I spent an hours debugging on a FF the other day, only to realize that I'd used a '2 lug potwiring' for the gainpot, and had been testing with the gainpot turned down...which of course messes with the bias.

[Floyd Pepper]

I built this version of the 1969 Fuzz http://www.diystompboxes.com/smfforum/index.php?topic=42400.msg307481#msg307481
which has positive ground.

It's currently my favorite effect pedal.  Sounds just like the Stooges.   

Have you check which strips you cut on the strip board?

My 1969's not boxed up yet so if you post the voltages going to the transistors I can easily compare to mine.

[jorgenkjellgren]

Thanks guys!
The quest for fuzz goes on...

Jörgen