FPGA VAX update, now DIY TTL computers

The answer is "no". As far as I know, no Nuvistors were computer rated. This is not a surprise for a couble of reasons. One, Nuvistors intended to be incredibly high quality amplifiers for things like test equipment and receiver front ends - basically with all of the parameters that a tube doing digital work need not be. Two, Nuvistors really did not gain too much in the space saving category over the computer rated submini dual triodes in use at the time. These latter tubes were well proven, and more reliable than Nuvistors (the culprits being the sockets). Running tubes at low plate voltages was not really an innovation - engineers had always done this, and many normal tubes will actually work at a quarter rated plate voltage or less. Purpose built low voltage tubes never took off too well - ther really is not a huge advantage in the power department, as the big share of the power bill was always the filament. William Donzelli aw288 at osfn.org