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-   -   standard AB bias heatsinking versus enriched class A (http://www.diyaudio.com/forums/solid-state/196227-standard-ab-bias-heatsinking-versus-enriched-class.html)

sreten 8th September 2011 08:34 PM

standard AB bias heatsinking versus enriched class A
 
Hi,

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.

AndrewT 9th September 2011 02:04 PM

I have not done the calculation but there should be plenty of info to allow it to be predicted.
Try ESP.

wtk98 7th October 2011 03:49 AM

Set bias current to 50deg Celsius -Nelson Pass


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