Schematics of Atanasoff-Berry Computer logic circuits?

Computer grade tubes did have to be tougher by far than the signal amplifiers. ENIAC had a problem with burning out tubes rather quickly because of that issue. Transisters were probably adapted much more quickly in switching networks than in signal processing for that reason and because no extra work had to be done to handle the stray capacitances that tubes suffer from. Transisters in signal processing had not yet achieved a state of the art that lent them to be used for much beyond those rather tinny sounding transister radios by 1960. I remember a book in the Old Dominion University library with a printing date of 1954 that showed practical schematics for vacuum tube logic gates with the necessary ancillary passive components. Like RTL but with more capacitors. bs On Fri, 22 Aug 2008, William Donzelli wrote: