Wow, (without flutter) you have quite a grounding radio. No pun intended! Bet you build your own superheterodyne amps as well!!
Yes, I have. That was a while back. I played bass in a rock band. When we were just starting out and wondering about how to acquire all the equipment, I designed and built the amps to lower the costs. They weren't very good but I did it and they did work. I built the mixer as well. I passed off some of my music experiments as qualified projects toward my EE degree. The guitar pedals were the easiest and the most fun. After I obtained my degree, I moved into other sorts of projects like astrophotography, telescope design, mycology, novel writing and other stuff serving as diversions from my full time job. I've never done any single thing really well, but I've done a whole lot of really cool stuff in my life.
Amps are not "super-heterodyne". Armstrong invented the super-heterodyne radio receiver in the 1930's. JeffD
Her description had nothing to do with the radio decoder. It dealt only with how the (already decoded) sound signal was put into the air as pressure waves by multiple amps and speakers. Three is plenty of room to mess things up here.
There was sort of a question under consideration though, namely, why were people reporting a reverb-like effect when hearing HD programming but not when hearing the same programming with HD off. -Chap
My dad taught me how to do basic television and radio repair when I was young. I learned how to use a volt meter when I was five. I built four radios before I turned twelve. I was going to be an architect so I studied electrical engineering for my BS... did the additional humanities to get a BA (good for architecture school). But when I graduated, I got more than a dozen job offers paying more than what I'd get as an architect (after another three years of schooling). I went for the money and I've not regretted that decision.