12-27-2013, 05:20 PM
The line filter (X+Y caps) onlyh helps with what comes via the outlet itself and the parameters of the filter do not reaaly attenuate any audio frequency much, they are for radio frequencies or hi-frequency switching noise etc.
Also simple 60Hz hum has no way of getting through antenna. I think it gets in when a field created by 60Hz source (whatever it may be) is strong enough and oriented in a certyain way towards the audio circuits or detectors. Let's put it this way - if touching a grid of a tube results in hum, this is the suceptible circuit. So maybe just reorienting the radio or moving it away could help.
Also simple 60Hz hum has no way of getting through antenna. I think it gets in when a field created by 60Hz source (whatever it may be) is strong enough and oriented in a certyain way towards the audio circuits or detectors. Let's put it this way - if touching a grid of a tube results in hum, this is the suceptible circuit. So maybe just reorienting the radio or moving it away could help.
