Aha! I found _an_ article, at least - it's more recent than whatever I originally was thinking of, but it did remind me that @funranium.bsky.social is probably *THE* person to ask about this stuff: www.funraniumlabs.com/2021/01/choo...
CHOOSE YOUR OWN RADIATION ADVENTURE - Old Tubes - Funranium LabsI should preface that my primary vacuum tube experience is related to trying to fix the 1920s built-in wall radio made of redwood in a house my family rented when I was in elementary school. Readers, ...www.funraniumlabs.com