Obsidian T Question

[Baktown]

All,

I just finished building the Obsidian T OD pedal designed by Joe Davisson.  It sounds great, but the tone pot is acting like a gain pot, turning it counter clockwise makes it sound like a volume pot on a guitar.  I double checked all my wiring, and everything is correct, so I'm wondering if there might be a mistake on the Vero layout?  Has anyone else had this problem before?

Thanks in advance for looking at the layout and schematic.

Axl Bundy

[MartyMart]

Axl, you need a trace cut under R17 which is not obvious from the vero layout !!
Also under R11 and R12 .....
Marty.

[Baktown]

Marty,

I did the trace cuts already, and I added a jumper from A1 to C1 as suggested in the comments in the gallery.

The sound of the build was very much a scooped out mid range, which suprises me as I expected it to be a little brighter.

Oh well, I'll keep trying!

Thanks for the help.

Axl

[petemoore]

  Dazza good one !!!
  IIRC that's the one I built [I lost count of how many Obsidian types there are] which sounded really fierce but had not the benefit of modern BYOSB building knowledge, my circuit structural integrity/neatness was terrible, and it failed...many crossing wires..layout is a good idea.
  But it was very very nice at the times when it worked, never got played at a gig though.
  Interesting LP filters implimentation at the base of Q3, Joe must have found that two caps are better than one there [would just use one cap there].