In Reply to: Re: PCB problems please help posted by David Ashby on 11/28/01 at 7:15 AM:
There may be high impedance nodes, how would I cure it?
I don't understand what you mean about the LM324 DC path. The + is the input from the LPF, and the - input is connected to the output by a 1M resistor, a diode, and a 1nF capacitor, both output and - are connected to ground via resistors and also there is a feedback connected to each.
There is a high DC gain in the circuit, but no obvious heat sources.