Hi,mlloyd1 said:I found the circuit I mentioned in an earlier post in this thread. It is very similar to what Nelson described. I have not built it, but I will....
Enjoy and if someone builds it before me, please report to the group. It includes some surge protection and HF line noise supression, which could be removed if you desired.
I' m afraid this circuit has a DC path ACROSS the capacitors via the diodes and will block no DC at all... The surge & HF supression part will probably be the only cause of improvement you can expect from it !
I susepct the diodes are in the circuit to protect the caps from excessive reverse voltage. Under normal operating circumstances, the diodes do not conduct at all - the caps wouldn't allow enough forward voltage to bias the diodes.
I initially thought as you did; then I though some more. I also tried an experiment using much lower voltages than power line levels. The diodes did not turn on.