My Westinghouse 987 could use some line filtering, does not show line filtering on the schem. can I use a Y2 .01, if so should it be connected across the line or hot to chassis.

Thanks.

A "Hot to chassis" capacitor will notionally dump stray RF coming in over the power line. However, in practice this isn't very effective since if there's junk RF on the AC line, there's junk RF around the AC line, too- which will be picked up by the set's antenna. Generally, line filtering is used to minimize RF artifacts (mixing products) generated within the set from being radiated out of the set, not to prevent RF noise from coming in.

The only effective way to suppress RF line noise is to suppress it at its source, before it can radiate far.

:
:A "Hot to chassis" capacitor will notionally dump stray RF coming in over the power line. However, in practice this isn't very effective since if there's junk RF on the AC line, there's junk RF around the AC line, too- which will be picked up by the set's antenna. Generally, line filtering is used to minimize RF artifacts (mixing products) generated within the set from being radiated out of the set, not to prevent RF noise from coming in.
:
:The only effective way to suppress RF line noise is to suppress it at its source, before it can radiate far.
:
CV, the radio has no ac interference normally, Its only when a light is switch is turned on or off, air con. starts, refrigerator start etc.. when I hear a pop. Is there a fix?

:CV, the radio has no ac interference normally, Its only when a light is switch is turned on or off, air con. starts, refrigerator start etc.. when I hear a pop. Is there a fix?
:

Not really. Any time you switch high current, you are creating a large transient EM field which is going to be audible on a nearby AM receiver. One "solution" would be to switch to listening to FM.

::CV, the radio has no ac interference normally, Its only when a light is switch is turned on or off, air con. starts, refrigerator start etc.. when I hear a pop. Is there a fix?
::
:
:Not really. Any time you switch high current, you are creating a large transient EM field which is going to be audible on a nearby AM receiver. One "solution" would be to switch to listening to FM.

CV, I have to agree with you there. Most of the interference is coming in on the antenna, and the only way to supress it is to prevent it from leaving the source, by putting a line filter in every source of interference.
Lewis
:

:::CV, the radio has no ac interference normally, Its only when a light is switch is turned on or off, air con. starts, refrigerator start etc.. when I hear a pop. Is there a fix?
:::
::
::Not really. Any time you switch high current, you are creating a large transient EM field which is going to be audible on a nearby AM receiver. One "solution" would be to switch to listening to FM.
:
:
:CV, I have to agree with you there. Most of the interference is coming in on the antenna, and the only way to supress it is to prevent it from leaving the source, by putting a line filter in every source of interference.
:Lewis
::
:
:
Thanks for the advice.