On 15/06/2021 18:37, Fredxx wrote:
On 15/06/2021 13:36, The Natural Philosopher wrote:
On 15/06/2021 10:35, Peter Able wrote:

At least he isn't trying to argue that no semiconductor device will
beat a 12AX7 ;

In 1950, he would be correct

I'm sure some transistors in Bell Labs in 1950 would have some
characteristic that would beat a 12AX7. Size might be one, though the
first ones had a hefty package.

Hell, the 12AX7 was only 'invented' in 1946.
Â* https://en.wikipedia.org/wiki/12AX7


Indeed Bell Labs would have. Vis-a-vis perceived lifetimes, the 2N3055
is on its state pension by now - but still a useful device to have in
the junk box. Go back the same number years from the 12AX7's birth date
and you are back in Victorian times!

PA