On Wed, 29 Mar 2006 20:27:29 +0200, "Ruud Broens"
wrote:

"Stewart Pinkerton" wrote in message
.. .
: On Wed, 29 Mar 2006 15:32:14 +0200, "Ruud Broens"
: wrote:

: you are also conveniently forgetting that - as is -, you have an input
: impedance of about 5 Ohms ...
:
: See KISASS for the solution. Tubes use lotsa volts, BJTs use lotsa
: milliamps, same thing in the end for the 'black box' solution.

aha, now we're getting somewhere :-)
so if someone now comes up with an SE pentode output stage, so no fb,
that can do 12W out at 7 % THD, 88W dissipation,
you'll agree that even the 2SA1216 can be beaten ?
ok ;-)

That'd be fine, as it would even more convincingly (for a tubie)
demonstrate that triodes (and especially DHTs) just aren't what you
want to use in a genuinely top-quality amplifier. Of course, you still
come back to the basic that in a 'black box' with equal voltage gain,
the BJT will win.

--

Stewart Pinkerton | Music is Art - Audio is Engineering

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