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Class D Switching Power Amplifiers and Power D/A conversion

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Old 9th August 2004, 03:22 PM   #1
beepx1 is offline beepx1  United States
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Default Class-T with Tubes?

Has anyone tried to use class-T technology with tubes as the power output devices? It dosn't seem that there should be anything wrong with this idea except for the power limitation.
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Old 10th August 2004, 09:27 AM   #2
MikeB is offline MikeB  Germany
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Hi !

I believe that it's pointless to try tubes as outputdevices in a PWM
design. As the outputdevices are switches only, you have no
audiophile advantage from tubes. This means, it only matters
how fast these devices can switch. Class-D designs with tubes
have been tried in the 50s/60s, and discarded because these had
even worse efficiency then analog designs.
Typically, mosfets are designed to switch...

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Old 11th August 2004, 06:41 PM   #3
beepx1 is offline beepx1  United States
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Thanks for your thoughts. Where did you find the info for the circuits using tubes? I'd like to take a closer look and see what their results were and maybe if using some of the new chips might improve things.
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