help with bluesbreaker build
Hello,
I recently made a board containing a Keeley moded blues driver and a blues breaker. THe blues driver works fine, however, the blues breaker I am having issues with. I get signal up until pin 1 of the op-amp, then I get nothing. I am pretty sure it is not an op-amp problem because I have switched it out for many other TLO72s and I get the same problem every time. I have built two boards and I am getting the same problem on both boards, so I believe it to be a board problem. I got the boards from JLCPCB, so Its probably not a reliability problem. Here is a screenshot of the eagle schematic. Maybe I made the schematic incorrectly? I have also tried jumping the input signal to the test point seen on the schematic, and it works fine for like 5 seconds and then it gets all fuzzy and fizzles out. No clue what could be causing this. Please let me know if my schematic or board looks messed up from the original schematic. Thanks so much in advance for all of your help/
I recently made a board containing a Keeley moded blues driver and a blues breaker. THe blues driver works fine, however, the blues breaker I am having issues with. I get signal up until pin 1 of the op-amp, then I get nothing. I am pretty sure it is not an op-amp problem because I have switched it out for many other TLO72s and I get the same problem every time. I have built two boards and I am getting the same problem on both boards, so I believe it to be a board problem. I got the boards from JLCPCB, so Its probably not a reliability problem. Here is a screenshot of the eagle schematic. Maybe I made the schematic incorrectly? I have also tried jumping the input signal to the test point seen on the schematic, and it works fine for like 5 seconds and then it gets all fuzzy and fizzles out. No clue what could be causing this. Please let me know if my schematic or board looks messed up from the original schematic. Thanks so much in advance for all of your help/
- mauman
- Resistor Ronker
The first cap at the input (10 nf) should not go to ground, it should break the signal path between the pulldown resistor (your R25) and the bias resistor (your R26.)