[algore]

By 1956, ENIAC contained 18,000 vacuum tubes; 7,200 crystal diodes; 1,500 relays; 70,000 resistors; 10,000 capacitors; and approximately 5,000,000 hand-soldered joints.

ENIAC used common radio tubes;

In 1954, the longest continuous period of operation without a tube failure was 116 hours—close to five days.

then the transistor changed everything, Never did get the straight story about how those came to be.

[algore]

these are about the only -Tubes I am considering these days

https://www.bobcarvercorp.com/products

but I would be just as happy with the old marantz one I never should have sold.

[cgbg]

the transistor changed everything, Never did get the straight story about how those came to be.

It was reverse engineered alien technology, of course! ;-)

https://www.mcall.com/news/mc-xpm-1997-07-06-3165146-story.html

[Falconspeed]

“By 1956, ENIAC contained 18,000 vacuum tubes.”

Very interesting. Thank you.