I finished my Lab Rat build this evening and I am having an issue where the signal is weak when I turn on the pedal and slowly fades to nothing after 3-4 minutes. Here’s how I got here:
1. Boxed up the pedal and plugged it in, low volume even with the volume maxed out. Overall signal slowly faded to nothing, I used an LM741 instead of the LM308 so I thought maybe that was the problem.
2. Swapped out the LM741 for an OP07, went to plug the pedal back in and realized it was on a 100ma port on my Cioks. Moved it over to a 400ma port and volume was where it should be. (Or so I thought)
3. Played for a bit and started to adjust the gain. Half way through the rotation of the gain pot, the signal completely cut out. The 9mm A100k pot I got from Tayda was not the normal Alpha but a darker green cheaper looking and feeling pot. I somehow had another “real” 9mm Alpha 100k so I pulled the cheap one and put this “real” one in.
4. Plugged the pedal back in, gain now works as it should but the low volume that slowly fades to no signal is back.
Any ideas? How much power does this pedal need and what would be causing the low volume and gradual complete loss of signal?
1. Boxed up the pedal and plugged it in, low volume even with the volume maxed out. Overall signal slowly faded to nothing, I used an LM741 instead of the LM308 so I thought maybe that was the problem.
2. Swapped out the LM741 for an OP07, went to plug the pedal back in and realized it was on a 100ma port on my Cioks. Moved it over to a 400ma port and volume was where it should be. (Or so I thought)
3. Played for a bit and started to adjust the gain. Half way through the rotation of the gain pot, the signal completely cut out. The 9mm A100k pot I got from Tayda was not the normal Alpha but a darker green cheaper looking and feeling pot. I somehow had another “real” 9mm Alpha 100k so I pulled the cheap one and put this “real” one in.
4. Plugged the pedal back in, gain now works as it should but the low volume that slowly fades to no signal is back.
Any ideas? How much power does this pedal need and what would be causing the low volume and gradual complete loss of signal?