Taqueria Overdrive weak signal

F

fav13andacdc

Member
Hello,

I'm having some trouble with my taqueria build. When the pedal is engaged, the signal is very weak. With all 3 knobs turned up to the max, the signal is barely at unity gain. All 3 knobs are reactive, though. At 50%, the signal is extremely weak, very much a cut. What are some causes of a weak output signal? What other troubleshooting measures can I try? Thank you! Posting some voltages below:

Trimmers 1A-3A
9.46, 9.50, and 9.51 respectively

Trimmers 1B-3B
7.43, 9.45, 1.65 respectively (I am unable to go lower than 1.65 on 3B.)

IC pin voltages
1 - 9.03
2 - 4.65
3 - 0
4 - .13
5 - 0.13
6 - 4.22
7 - 5.72
8 - 9.04

D102 - 17.66 IMG_8887.jpeg
 
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Update for those of the future researching a weak output signal: Found a short. The output wire is grounding out. I think it's at the footswitch based on my multimeter. May be some solder connecting lugs 5, 7, and maybe 8 underneath the breakout board. Will update when I can get it undone.

That would explain why it works fine in bypass.
 
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Are you using sockets on the 201s? May have a bad connection. Press and jiggle with a looper going.
If you have an audio probe, probe pin 1/Drain/left and 3/Gate/right of each 201. 1 should be louder than 3.
 
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jwin615 said:
Are you using sockets on the 201s? May have a bad connection. Press and jiggle with a looper going.
If you have an audio probe, probe pin 1/Drain/left and 3/Gate/right of each 201. 1 should be louder than 3.
Click to expand...
Thanks for the reply. I’m using presoldered SMD J201s from PedalPCB soldered in with electrolytic leg clippings. I will probably be using sockets on new builds, though!

I don’t have an audio probe but I’ll try rigging one up.
 
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