[Bruce B]

I checked the a antenna signal can be tuned in all up and down the dial. It's when you remove the signal it is replaced by louder noise all up and down the dial.
This morning I took the radio for a road trip to a building I own 5 miles away from my house. The radio became quite quiet and tunes in stations ok.
If interested I have posted two videos of at my house and at 5 miles away.

At my house
https://photos.app.goo.gl/iY3jZX9h2mokeAFo7
5 miles away
https://photos.app.goo.gl/foux4nTd1zT3t6Ab7

I have called the power company and they are going to check it out. They told me that they have had trouble with lightning arresters with arced over capacitors that were damaged in a recent lightning storm we had. Hope that's it, because my new hobby is fun when you can't operate a radio in your house. This interference is so strong it completely prevents any AM radio from receiving a radio station.
I am for now going to focus on returning the power supply to original design, it's a mess. Don't know why it's working. I don't need to worry about coils and interference to do that.?
OH! That video on oscillations and beat frequency to explain a superhet radio was cool, I did like it, thanks
Bruce B