standard AB bias heatsinking versus enriched class A - diyAudio
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Old 8th September 2011, 09:34 PM   #1
sreten is offline sreten  United Kingdom
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Join Date: Nov 2003
Location: Brighton UK
Default standard AB bias heatsinking versus enriched class A


I wonder if anyone has done the thermal calculations for what is the maximum
enriched class A bias for AB ? compared to standard optimum biased AB. i.e.
how much class A can you run within normal AB biased 1/3 continuous power
heatsinking ? i.e. that no extra heatsinking is required, static heatsink
temperature is the same as the the 1/3 continuous power soak test.

And what would the two output stage heat dissipation profiles look like ?

I cannot work out if extra heatsinking is always needed or not .....

rgds, sreten.
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 8th September 2011 at 09:36 PM.
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Old 9th September 2011, 03:04 PM   #2
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
I have not done the calculation but there should be plenty of info to allow it to be predicted.
Try ESP.
regards Andrew T.
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Old 7th October 2011, 04:49 AM   #3
wtk98 is offline wtk98  United States
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Join Date: Jan 2009
Set bias current to 50deg Celsius -Nelson Pass
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