Eike Lantzsch, ZP6CGE wrote:
Patrick Turner wrote:

"Eike Lantzsch, ZP6CGE" wrote:


[some stuff that is now snipped]

Besides:
There would be no semiconductor devices without vacuum technology. ;-)

We can't be sure of that.

Sooner or later some dude would have persisted with experiments on germanium
long enough
to make a transistor. That happened of course in about 1947, but without
tubes and electronics
occuring first, perhaps transistors may have been invented 20 years prior to
1947,

[snip]

Patrick Turner.


Hi Pat:

I forgot to put the "beware, wet paint" sign on - sorry.
I was referring to the high-vacuum pumps, which are needed for the photo
processes, for the diffusion and metal vaporizing for manufacturing
semiconductors. ;-)

Ever so kind regards, Eike

Not to mention the induction heaters needed for melting and refining
semiconductors---powered by big honking tubes...

Bob Weiss N2IXK