Tried Googling answer to this but no luck.
So I've noticed with several radios, both tube and solid state, that I get a a hum on some AM stations. It seems like the stronger and or closer the station is to me, the more likely it will hum. Not all strong(er) stations hum. However, no weak or moderate signal stations hum.
I am assuming this has nothing to do with bad power supplies since it isn't a problem on all AM stations.
Strong stations that are somewhat nulled with a directional AM antenna seem to be more prone to this but that is not absolute.
When tuning between stations, it is just ordinary white noise, no hum or other interference (unless I've got a dimmer on somewhere).
Curious if anyone has ever observed this cocktail of symptoms or knows what it is.
So I've noticed with several radios, both tube and solid state, that I get a a hum on some AM stations. It seems like the stronger and or closer the station is to me, the more likely it will hum. Not all strong(er) stations hum. However, no weak or moderate signal stations hum.
I am assuming this has nothing to do with bad power supplies since it isn't a problem on all AM stations.
Strong stations that are somewhat nulled with a directional AM antenna seem to be more prone to this but that is not absolute.
When tuning between stations, it is just ordinary white noise, no hum or other interference (unless I've got a dimmer on somewhere).
Curious if anyone has ever observed this cocktail of symptoms or knows what it is.