I built the Low Tide PCB, but it produces very strong distortion and the sound is too loud. I’ve tried adjusting the BBD Bias trimpot and Gate trimpot, but the issue persists. Notably:
Q1 - 2SK208-Y:
Q4 - J201:
IC1 - LM78L05:
IC4 - LM258P:
IC7 - V3207D
Some of the ICs have fluctuating values, so I wasn’t able to get consistent measurements.
If there’s anything I might have missed or additional steps I should take, I would greatly appreciate your advice.
- The distortion and noise still occur even when the Mix knob is set to 0.
- The modulation does not seem to work at all.
- The gate function works, but when it engages, the volume increases significantly.
- There are no issues or noise when the guitar is not being played or when the pedal is bypassed.
Q1 - 2SK208-Y:
- Source: 4.96V
- Drain: 0.3V
- Gate: 0
- Collector: 8.7V
- Base: 4.96V
- Emitter: 4.33V
- Collector: 5.15V
- Base: 4.07V
- Emitter: 3.54V
Q4 - J201:
- Source: 0.21V
- Drain: 5.1V
- Gate: 0
- Collector: 8.7V
- Base: 5.12V
- Emitter: 4.46V
IC1 - LM78L05:
- Input: 8.7V
- Ground: 0
- Output: 5.04V
- Pin 1: 4.71V
- Pin 2: 4.61V
- Pin 3: 5.01V
- Pin 4: 0
- Pin 5: 5.04
- Pin 6: 5.01
- Pin 7: 5.03
- Pin 8: Moves randomly from 1 to 4
IC4 - LM258P:
- Pin 1: 0.01
- Pin 2: 2.51V
- Pin 3: 2.5V
- Pin 4: 0
- Pin 5: 8.7
- Pin 6: 2.14
- Pin 7: 2.14
- Pin 8: 2.14
- Pin 4: 0
- Pin 8: 2.14
IC7 - V3207D
Some of the ICs have fluctuating values, so I wasn’t able to get consistent measurements.
If there’s anything I might have missed or additional steps I should take, I would greatly appreciate your advice.