Thanks for checking on this Glen!
Let’s try to tackle the issue with my build then, before the spam routine of death does its next round …
My build went good so far. As I already posted, the instructions are superb and the build itself has no bigger challenges.
Everything seems to work so far, but these things:
– the heat shrink tubbing was mangled, but I used a slightly bigger one and both optocouplers pass signal when starting in calibration mode. Maybe this has an impact on the third issue below?
– U2 pin 5 measures only 4.15V instead of 4.5, all other measurements across the board are perfectly fine. Is this a problem?
But my main issue:
– I can’t get lower than 19.5kΩ on VR8 when measuring TP1-2. The trim pots are correctly oriented, wiggle test is negative. I went through the whole troubleshooting guide and I double checked my soldering. Everything seems fine. While measuring, everything is set according to assy manual p46 ff.The overall sound is quite muffled and bassy with Harmonic Trem almost inaudible if set to full depth and mix full clockwise. More a very slight wobble but nothing like in the demo.
My next step would be to swap VR8/VR9 to see if the trim pot is damaged, but maybe you have another idea?
Thank you for your help!
Sebastian