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Here is nothing spectacular I am anyway try fix it now. I guess opa pcb i will rebuild later one more time bit more clear. But now i must found where is problem with broke down chips on it. At this moment i found this. Between 5 and 6 legs of already broken tl072 i found some resistance around 40 mom. But i still have one more new tl072 and there i don't found this. Other pins looks like about same on both differences only about like in different manufacturers. Maybe i will try replace 200 om resistor on 330 om like i found on other circuit diagram and will try one more time. But i not sure about problem exactly about it. Just maybe.I am already replaced tl072 on new and replaced 200 om resistor on 330 om in opa alice circuit. So this new tl072 sounds more bad than previous from different manufacturer.
Here is nothing spectacular I am anyway try fix it now. I guess opa pcb i will rebuild later one more time bit more clear. But now i must found where is problem with broke down chips on it. At this moment i found this. Between 5 and 6 legs of already broken tl072 i found some resistance around 40 mom. But i still have one more new tl072 and there i don't found this. Other pins looks like about same on both differences only about like in different manufacturers. Maybe i will try replace 200 om resistor on 330 om like i found on other circuit diagram and will try one more time. But i not sure about problem exactly about it. Just maybe.
I am already replaced tl072 on new and replaced 200 om resistor on 330 om in opa alice circuit. So this new tl072 sounds more bad than previous from different manufacturer.
