diy IF transformers: first attempt.

[Amie]

There have been some good papers on the subject over the years, I don't have the links to hand here but Marcus Scroggie was published on the subject in the 1940's in Wireless World, (doesn't reference Armstrong's work), there's a paper by Prof. Eddie Insam of Bristol university that's very good, and for some real night time reading a post graduate paper from an MIT team, who I will not insult by attempting to spell their names without checking first.....