"RapidRonnie" wrote in message
ups.com
Jim Thompson wrote:
snip
Uh..!? Tubes from different manufacturers are
_massively_ better matched than any two transistors or
ICs from the _same batch_!

Tim

What a pile of nonsense!

I'm afraid it's true. Discrete power transistors vary
much more than tubes of a given type and manufacture run.

Not in terms of parameters that matter.

That's why construction or repair of high power solid
state amps requires either factory-matched sets or the
use of a curve tracer to sort through piles of them.

That would be a misapprehension on your part, Ronnie.