2-2.5 times the dissipation is normal.
Assume 1500 out, at 70% efficiency that is 643W dissipation, 1500/643=2.33.
Eimac claims 75% efficiency on their 3CX3000A7 datasheet in AB2.
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Gudguyham@aol.com
Sent: Mittwoch, 23. Juli 2008 18:30
To: amps@contesting.com
Subject: [Amps] Bill Orr comment
I was reading the Bill Orr handbook and on his section about amplifiers he
says.....A properly designed grounded grid amplifier should produce 2 to 2.5
times the plate dissapation of the tube in output. He did not put any
limitations on the statement as to IMD or anything like that. He did not
say if the tubes ratings would be surpassed (I am sure they would), but I
think what he was saying is that the tube should continue to make power to 2
to 2.5 times it's dissapation before it would not make any more power and
flatten out.
Upon speaking with an amp "Guru" about this subject, he procalimed that
Bill Orr was a "QUACK". The basis of his claim was that he was never able
to build an amplifier that obtained that kind of results.
What say you? Lou W1QJ
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