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GB: Round #10; Fo-Felix AC Filter

I had a horrible dream that I looked in a backpack of mine and it was full of unsent Fo-Felix's already packed ready to go. And I knew that all the $ for shipping had been used. :eek:

Weird dream to have after the fact. I believe everyone is receiving them or already has at this point.
 
I'm a Newby. I see that there are pads for two resistors that apparently shunt the CM coils, the third resistor just looks like a bleeder for the caps.

Is there a formula to calculate the value of these shunting resisor(s)? Or the reasoning to use one, both or none of these resistors? I scoured the site but didn't find an answer, yet I see photos with a resistor installed here, another left it off, etc. What's up with these resistors? Sorry if I missed something reading about this circuit.
 
I'm a Newby. I see that there are pads for two resistors that apparently shunt the CM coils, the third resistor just looks like a bleeder for the caps.

Is there a formula to calculate the value of these shunting resisor(s)? Or the reasoning to use one, both or none of these resistors? I scoured the site but didn't find an answer, yet I see photos with a resistor installed here, another left it off, etc. What's up with these resistors? Sorry if I missed something reading about this circuit.

All of that is provided when you get some PCBs.