For the same reason others have mentioned, I never considered it practical to filter the entire supply load.
What I am looking for instead is to provide a low impedance path, from the building's wiring grid to ground, for frequencies higher than 50/60Hz. From the responses so far, am I to assume this is not technically possible? Yet, it is common practice within electronic devices, capacitive decoupling, amplifer LPF's, etc. I see no difference in the basic concept. It seems to be just a matter of scale and component selection.
To reiterate, this item is not intended to be a conventional ripple or surge filter on the mains grid. It is a shunt for a relatively low amplitude of HF noise riding thereupon. I believe I have already explained that, for this app, it is not desired to incorporate this capability into each and every connected device.
What I am looking for instead is to provide a low impedance path, from the building's wiring grid to ground, for frequencies higher than 50/60Hz. From the responses so far, am I to assume this is not technically possible? Yet, it is common practice within electronic devices, capacitive decoupling, amplifer LPF's, etc. I see no difference in the basic concept. It seems to be just a matter of scale and component selection.
To reiterate, this item is not intended to be a conventional ripple or surge filter on the mains grid. It is a shunt for a relatively low amplitude of HF noise riding thereupon. I believe I have already explained that, for this app, it is not desired to incorporate this capability into each and every connected device.