I just built me a 630 meter regenerative receiver, just to use up some parts and a plank of wood I had. Two J-fets and three audio transistors (actual push pull output that drives a genuine speaker. Built entirely without a schematic....constructed on the fly and designed as I went along. And it works! I like doing this stuff...and it's been too long since the last time I did it. Photos tomorrow ifn' I remember.