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Really good selection of reference books from days gone by. Several publications of radio experimentation. Thought you were tough 'cause you built your own tube amp? How about building your own tubes! These books are just plain fun.....Colin http://www.lindsaybks.com/
That's is such a cool link, thanks! I especially liked these: Bob Jorgensen's Steam Auto, Motorcycle & Engines Vince and Dave Gingery's Boundry Layer Effect Tesla Turbine Radio Experimenter Hydrogen: Fuel from Water Distillation and Rectification of Alcohol Model Engineering Van de Graaff and other High Voltage Generators Lindsay's Technical Books