A beautiful introduction to regenerative receivers

Probably this will sound not new for many (if not all) enthusiasts of regenerative receivers, anyway I thought it could be still helpful for some (including me, of course) to read this beautiful introduction to construction of simple regenerative receivers from Gary Johanson, WD4NKA.
I have found it very interesting, informative and a real pleasure to read. In me it triggered a desire to start collection the parts for another regen, possibly built around a 6SN7 dual triode as described in the article.

"A 1938-1948 Era One Tube Regenerative Receiver" by Gary Johanson, WD4NKA

From http://www.qsl.net/w/wd4nka/ by Gary Johanson, WD4NKA