Vintage IBM mainframe computer 1955 tube display hardwood plaque 650 604 701 For Sale

Vintage IBM mainframe computer 1955 tube display hardwood plaque 650 604 701
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Vintage IBM mainframe computer 1955 tube display hardwood plaque 650 604 701:
$19.99

Vintage electronic vacuum tube display on hardwood plaque, keyhole routed for hanging, or just desk display.
1955 dated E92CC tube, epoxy flood coated for protection (still possible to break it, but harder!). Epoxy also protects the vintage writing.
You don’t get the exact one shown. You get one that is just like it: 1955 date code, 1955 wood engraving, clear tube type and I.B.M. branded. Also same maple wood, with only oil finish and epoxy coating.
Note the periods in the IBM. This is way before the familiar banded logo that came out in 1972.
Display plaque is approximately 2.75x4 inches.
Free ship to US48 only.
This tube type is a dual triode, used in many IBM computers including the 650 and earlier 604 electronic calculator. See wiki on these interesting devices.
For fun, assume a vacuum tube needs 2x2x4 inches of space (very aggressive, assumes solving power, cooling, and support component problems), or 16 cubic inches. A standard football field is 120yds x 53.3yds, or 57,600 square feet, or 57,600 cubic feet at 1 foot depth. This is 8,294,400 cubic inches.
So we can fit 518,400 tubes in one FbF (football field, one ft deep).
Modern CPUs contain billions of transistors, each of which is approximately the same logic capacity as 1 vacuum tube triode, just slower. We will need over 1900 FbFs to hold just 1 billion logic units. Fear not, as our triode tubes are DUAL triodes, so we only need 950 FbFs. This is around 1254 acres, not including space for parking or the hot dog stand.
Good luck with that vintage smart watch project.


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