Spirit Box w/ Fuzzdog mods
- Thread starter Glitchlab
- Start date
comradehoser
Well-known member
From other build reports and fuzzdog's page, just to make it easily accessible in this forum. Forum mods first, fuzzdog second.
R4 (I think) 10K>18K for unity volume increase
R8 22k>10K or 12K for self oscillation
Dwell Pot B5K>B10K or B25K--why this one? Just to make the self-oscillation more manageable, or....?
jdduffield
Active member
I built the spirit box Pcb and noticed a drastic volume drop when the pedal is on. In other words, I need more volume to achieve unity gain. I’ve been reading that the best approach is to increase the resistance value of R4. I started out with 10k. I tried 18k, 20k, 47k, and 68k. The higher I go the closer to unity gain I get. Most people seem to only increase to 18k or 20k. I still need more volume but not sure how high I can go before breaking something. Can I try 100k or is that a bad idea for some reason?
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Feral Feline
Well-known member
Start your own thread in the trouble-shooting sub-forum, it’s bad forum-form to jack somebody else’s build report with your problem.
If you’re having to swing that far outside spec’d values, I’d say there’s another area of your build that needs attention…
So, see you over in your own thread, soon.
jdduffield
Active member
Stared a new thread. I was going to do that but wasn’t sure which was better … to start a new thread or add on where a similar issue was already being talked about.
