burger-patty-and-bacon
Active member
Finished my build last night of the ISOSCELES. Pedal is working and the TC mode sounds great, but when I switch to Fortin mode (the toggle on the left to go between preamp and boost called SW1) there is a massive drop in volume (regardless of the 33 or Grind toggle mode). In TC mode all is fine, bass/treble respond and it sounds great, solid output and hits the amp nicely.
I read in the reviews about people saying they had super low output and the only specific thing I found in forum was one builder who swapped R4 to a 19K (mine is the stock 15k).
I did not sub out any parts other than the BC549C for a BC550C because you can't get BC550C anymore. I even tried swapping the BC549C for a 2N5089 (installed backwards) and it made no difference.
I have a home brew audio probe and a DMM. I suppose step one is to DMM check all of the values of all caps and resistors? All of the electro caps I used are 35V or higher rated and are Nichicon or JB. Mostly WIMA brand box film, all good stuff in the pedal. Here are pics. I accidentally hit the top of that C4 cap and put a slight indent on it, same for the very big C12 but I don't think they hurt the box films, functionally.
Could really use some help here... It's odd that I read about this pedal having issues in the reviews and my build has those same issues. I do not have a spare TL071 or a spare TC1044SCPA to swap with, unfortunately.
I read in the reviews about people saying they had super low output and the only specific thing I found in forum was one builder who swapped R4 to a 19K (mine is the stock 15k).
I did not sub out any parts other than the BC549C for a BC550C because you can't get BC550C anymore. I even tried swapping the BC549C for a 2N5089 (installed backwards) and it made no difference.
I have a home brew audio probe and a DMM. I suppose step one is to DMM check all of the values of all caps and resistors? All of the electro caps I used are 35V or higher rated and are Nichicon or JB. Mostly WIMA brand box film, all good stuff in the pedal. Here are pics. I accidentally hit the top of that C4 cap and put a slight indent on it, same for the very big C12 but I don't think they hurt the box films, functionally.
Could really use some help here... It's odd that I read about this pedal having issues in the reviews and my build has those same issues. I do not have a spare TL071 or a spare TC1044SCPA to swap with, unfortunately.