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-   -   thermal distortion in class T amplifiers (http://www.diyaudio.com/forums/class-d/36462-thermal-distortion-class-t-amplifiers.html)

memo 21st June 2004 07:39 PM

thermal distortion in class T amplifiers
 
Hi

i resently builded an amplifier from a tripath module, and experienced that after short time, the sound change dramaticly when it gets little warmer. id like to hear from others who experimented with it. maybe who know details about the modules how to enhance its performance. standard aluminium heatsink doesnt improve it as i tested it. maybe anyone can come up with ideas to cool the module active, but in a discrete way.

michael

Sch3mat1c 21st June 2004 11:32 PM

I know classes A-D, G and H, but what's T?

Tim

phase_accurate 25th June 2004 05:58 AM

Quote:

but what's T?
That's Tripath's designation of their class-d amplifiers. Basically some sort of delta-sigma modulation. I'm still not sure whether it's clocked or free-running.

Regards

Charles

jan.didden 25th June 2004 08:40 AM

Re: thermal distortion in class T amplifiers
 
Quote:

Originally posted by memo
Hi

i resently builded an amplifier from a tripath module, and experienced that after short time, the sound change dramaticly when it gets little warmer. [snip]michael


Well, if this happens, there is something seriously wrong with your module(s). Maybe you should send them back for exchange.
My experience, although through a friend, is that they are rock-stable on this. There are no "analog" biases or conditions that can change due to temp. In fact, with increased temp the switching should become better, if it would change at all. What's the delta-T you think?

Jan Didden


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