On Tue, 2005-03-29 at 16:35, Richard Measures wrote: > Solid state will Definitely be the way to go when carbon-crystal > transistors are commonplace. Who knows?, maybe they will even have an > efficiency as high as 60%! 60+% is easy with semiconductors, provided you're not trying to do it over 4 octaves 'no tune'. Same as a tube, really :-) Steve