You may have seen my previous post about LM4562 precautions. In the 4 or 5 months since I posted that, I have used 2 of the LM4562. The first went into a Brickwall filter and worked just fine. The second one went into one of my opamp multi-purpose pc boards that I put together today as a direct box for my studio.
The project did not work with the LM4562. I checked the voltages and they were spot on. The audio signal was going in but nothing was coming out of the chip. I dropped in a 5532 and the direct box worked perfectly. Another LM4562 was bad.
I’m not sure what is causing the problem with these chips, but in this case, I am sure that the power supply was never connected backwards, nor any other fault was present. The 4562 just will not work, even though I handled it carefully, but the 5532 worked like a charm. I’m probably giving up on them at this point.
