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I’ve built a marble drive and bought one that was made from another guy. Both sound similar to each other but truly nothing like the real one I bought today. ( verified real j201’s) Something is missing?!!

Anyone built a Marble Drive? What are you setting the trimpots at? Is this to taste? High on the first stage then lower throughout?

Just curios what Hfe for Q1,Q2,Q3 ? They look to cascade gain so is it good to start low and get higher down the chain? Or?

I double checked all of my components and even swapped out the trim pot. I cant get the voltage on pin 3 of Q3 below 6.2v ??? ideas?

Hello , Nate from Rieman’s here. I tried a friends pedal pawn Texas Twang and I think it’s a copy of the Diaz Texas Ranger. I’d love to build my own clone of that. 😋

I’m using this in an fx loop. Guitar in and trough to the amp. All works great. Now I put a delay pedal in the loop after the gate and get a loud pop when switching the gate on/off????

Where should I start looking when the muzzle ( original ) is so sensitive that I can either play or with the slightest adjustment of the knob will cut the signal down?

I have the muzzle and using the Key in it squeels.??? Ideas? Some sort of feedback loop. I checked my grounds.

I know i'm buggin but I cant get this figured out. I think the most current Double tracker board doesn't match the schematic in the build doc. Is there a newer schematic?

I have the most current double tracker. I believe the schematic does not follow the Pythagoras as it shows in the build doc. Is this true? Is there a newer schematic?

Kinda bad noise floor. Its not a hum but white noise. Ideas?

I see that the chip has the outputs summed together. How difficult would it be to make this stereo? Instead of a mix it could be a dry on one side and effect on the other?