I understand the attraction of this circuit. Very simple, very clean.
Easy to understand. I built it and it was a great experience. I have
info on my web site. http://www.qsl.net/n2cqr

I could probably dig up the schematic and scan it if the original
poster still needs it -- please let me know. I recall several LONG
discussions of possible replacements for the dual gate MOSFETS.

73 Bill M0HBR N2CQR CU2JL