Supreaux and Prof Tweed biasing problem

Forum dedicated to helping people debug and troubleshoot non-functional pedals or builds. Please use an clear and informative title, indicating circuit and basic problem. Don't forget to mark the issue as fixed if this is the case.
Post Reply
User avatar
jethrofloyd67
Information
Posts: 13
Joined: 30 Apr 2013, 07:53
Has thanked: 1 time
Been thanked: 1 time

Post by jethrofloyd67 »

so i downloaded the schematics and breadboarded the Supreaux from ROG. got to work biasing the jfets to read 4.5v at the drain as stated on the schem. first two came out perfect, but the third is too high. at the highest it reads 8.98 and the lowest 7.31. the others go from 8.98 all the way down to 0.20.
ive swapped the trim pots around and tested all of them (all 100k), dismantled and rebuilt the thing twice before giving up and trying the Prof Tweed...
same problem...
has anyone else experienced this? im at a loss for whats going on here.

Post Reply