jon risch AC Power Line Filter - q's

[sumotan]

Agrees Gusser and that's why I consulted Jon way back when.
My inductors are custom wound with very heavy gauge copper
wire wound over an stack of I plates thats use making EI transformers
There's harding any voltage drop even under high current draw. You
can hear it with heavy low bass music especially from Kudo drums

Cheers

 

[TonyTecson]

But again if we had proper engineering data, we would know how much voltage drop the filter has versus the current draw.

you can take the dc resistance of the input to output terminals,
then you will have a clear idea as to how much is lost with current draw...

 

[TonyTecson]

btw, ATX psus, and some old color tv's uses these emi filters,
i harvest many of them for later reuse in many of my projects...

 

[JPS64]

Netzfilter, HiFi Entstörfilter von THEL, audiophile Netzzentralen selber bauen

 

[Gusser]

you can take the dc resistance of the input to output terminals,
then you will have a clear idea as to how much is lost with current draw...

Not that simple!

You have an AC source going through an LC network feeding an inductive load,
the amp power transformer.

Further complicating is the amp's power supply rectification draws current in a non linear manner.

 

[TonyTecson]

ac voltmeters before and after the filter.....
i use these kind of meters....
meter on the right can display voltage, current and power at once...

 

[phase]

I built a circuit similar to that into a power strip, and it does sound better when I also load it down a bit I had noticed.
.33uf X cap+common mode choke, repeat + .33 X cap

I use this after a 1k isolation transformer for a headphone amp/dac.