On Monday 02 January 2006 05:37 pm, Chuck Guzis wrote:
On 1/2/2006 at 4:56 PM Roy J. Tellason wrote:
Aside from the active devices themselves, tubes
are limited by the
characteristics of the output transformer, which (as far as I know) isn't
there in FET amps. And other things, like the "softness" of the power
supply voltage under transient loads and such.
To the best of my recollection, transformers *added* their own particular
brand of distortion and limited frequency response.
Just so. Which is why that would also have some effect in a tube amp, and
not be present in a FET amp...
By "softness" of power supply voltage, do
you mean "bad load regulation"?
Yes. Add to that the variations in design, resistors vs. filter chokes and
some earlier stuff that used the field coil of the speaker in that circuit,
and things get awfully complicated to try and figure, real quick. :-)
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin