01-06-2014, 10:36 PM
This is an evening (mostly) hum. I also have an early morning hum. In all radios. it disappears midday and then reappears some time after 7 or 8.
I also suspect the "evening power factor" plays a part, when all folks come home and turn on their TVs and what not, with poor power factor correction, and all those filter caps charging create some abomination of a waveform in the MAINs.
I also suspect the "evening power factor" plays a part, when all folks come home and turn on their TVs and what not, with poor power factor correction, and all those filter caps charging create some abomination of a waveform in the MAINs.