[ARC5] How Edwin Armstrong invented the superhet

[Hubert Miller]

Those beginner level receivers that used regenerative IF, such as S-140, Knight Star Roamer, S-38, maybe others, I have never read a review that was
positive about this circuit. That was also my experience trying this on a Command Set receiver. When I read the article on the ARC-2 suggesting this
trick, I thought about just how well that would work out.
-Hue Miller