Quite simply because life and death no longer depend on the quality of a vacuum tube, the way it did back in the hay days, during WW II, when tube technology drove design and manufacturing to the maxx.
We now just use tubes for a casual hobby, lives are no longer at stake, so there is a HUGE loss of military funding for vacuum tube design and manufacturing quality standards.
Cheers,
John
We now just use tubes for a casual hobby, lives are no longer at stake, so there is a HUGE loss of military funding for vacuum tube design and manufacturing quality standards.
Cheers,
John