In article , Andy Evans
wrote:
Read the whole article at
http://www.aloha-audio.com/library/FindingCG.html

If I get a chance I'll have a look. :-)

excerpt - "try and find a transistor circuit that can deliver 50V rms at
less than 1% distortion with no feedback!"

If they mean "into a loudspeaker load with an impedance between 4 and 8
Ohms" when considering domestic audio power amps, then I suspect you could
match this with:

"try to find a *valve* circuit that can deliver 50V rms at less than 1%
distortion and no feedback.!"

Slainte,

Jim

--
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Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html