fried VME modules

OK, here's the over-the-top version

typical california/commie garbage software tricks.

Now the Russians will claim they knew all this already 100 years ago :-)

The TL431 was taped out in 1912 iirc. ;)

Cheers

Phil Hobbs

I've got a radio from my grandpa, he was always an early adopter when it came to technology. It's from 1926 and contains the first ever integrated circuit:

Maybe I should fire it up some day.

Fun.

I sort of suspect that "3NF" doesn't mean "3000 uuF". They didn't have nanofarads in those days. ;)

Why not? It's unlikely to have corroded internally, after all.

Cheers

Phil Hobbs

It's three triodes in one package. There's also a 2NF with two tetrodes in one package.

Apparently, the motivation behind being the first integrated circuit is far from wanting to advance the technology:

"The device was produced not to enter the integrated circuit era several decades early, but to evade German taxes levied on a per valveholder basis. As the Loewe set had only one valveholder, it was able to substantially undercut the competition."

Just follow the money.

German: Niederfrequenz English: Audio frequency

Also see:

The litho master was ink on starched linen.

Decades later, people advanced to Rubylith and x-acto knives.

Seriously, early PCB layouts were ink on vellum.

I _did_ those. Guess I am old ...

Whenever I am in S.F. again I'll bring you my vellum pads since I think you like to use that for sketching up ideas. I am totally paperless by now. Just finished a design and not one speck of paper was used.

Of course, I managed to fry another PC on Saturday and had to order a new one. Design was cheaper in terms of materials in the paper days.

I recall using Bishop Graphics (decals and crepe tape) in 1983, MacPaint and a copy camera to get the scale accurate in 1985, and 1988 gave us PostScript printers that could do the fine-tuned scale, in 1988. You can make Kodalith contact prints off the paper print, with enough UV.

It's amazing how slow and tedious everything used to be. Remember bingo cards?

I designed and laid out 11 circuit boards in one weekend recently.

A couple of them work!

Design automation:

whit3rd snipped-for-privacy@gmail.com wrote in news: snipped-for-privacy@googlegroups.com:

We used tape on mylar because we also used a 286 running AutoCAD 2 to output 4X lines art to the D sized HP pen plotter. We also, however, had our own camera where the print was placed ten feet away and precision sizing and PCB fab house ready art shots were produced. This was in 86 doing IR instrumentation circuits.