I should pay more attention - that's your B-7971 board - nice. On Tuesday, 26 November 2019 12:19:55 UTC, Mitch wrote: > > > > I was a little surprised that the power supplies worked the first time. A > LM2576 is used to drop the supply voltage to 5v. Two 34063 chips raise that > voltage to 32v, and lower it to 1.65v. The datasheet and online calculators > for the 34063s made that part easy. > > The next revision will use separate tube boards. Curiously the tubes I > have with 1990 date codes aren’t very bright. The 1987 versions are good. > > I can’t seem to find matching LEDs for the blue-green color, to use for > colons. Otherwise everything works as it should. > > > > > > [image: IMG-0185.jpg] > >
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