I’ve been putting aluminum foil on my head for decades. Saves me from the aliens getting my brain. I learned that trick during the late 70’s while in Sedona. 😆 But joking aside you’re correct. I started playing with foil while in high school in the early 70’s. Started building stereo amps in electronics class and speakers in wood shop. I used the foil to insulate sections of the cheap kits to reduce hum. Ah the good old days when there was an RCA tube tester and the bottom was full of tubes at Thrifty Drugs. Cheers , Mike B.
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