Troubleshooting Pedal
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The DIY forum is for personal projects (things that are not for sale, not in production), info sharing, peer to peer assistance. No backdoor spamming (DIY posts that are actually advertisements for your business). No clones of in-production pedals. If you have concerns or questions, feel free to PM admin. Thanks so much!
- proroby
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Troubleshooting Pedal
Hey, so I have a Prescription Electronics Experience old perf board pedal. When I engage the "fuzz" effect it works fine, but when I try to add the octave or swell feature I get a severe volume drop. What could cause this?
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- eatyourguitar
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- proroby
- FAMOUS

- Posts: 1091
- Joined: Wed Apr 28, 2010 9:59 am
- Location: Wilmington, DE
Re: Troubleshooting Pedal
There's a snake in my boots. Someone poisoned the waterhole!
- greeny23
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- proroby
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- Location: Wilmington, DE
Re: Troubleshooting Pedal
I should also note that this is inside my guitar and is being powered through a TRS cable into a pedal powered by my CIOKS powersupply, I don' think this is the problem because my other fuzz works fine.
There's a snake in my boots. Someone poisoned the waterhole!
- eatyourguitar
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- Joined: Sun Oct 03, 2010 12:37 pm
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Re: Troubleshooting Pedal

when octave and swell are both engaged and swell knob is fully ccw you have a 470R shunt on the tip of your output jack. that explains it. the circuit is just made that way. be careful how you have the swell knob set. you could use a dual 100k pot for swell with the other element wired as a volume control that gets louder at ccw. the problem is that you are just attenuating everything if you do that. the makeup gain needed on the output might create more noise than is acceptable.
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