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Old 6th June 2006, 05:18 PM   #11
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EEEEEEEK What in the name of **** **** was that thing driving ???
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Old 6th June 2006, 05:28 PM   #12
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it ain't a speaker, that´s for sure.. it's a kind of industrial application with a low and reactive load that need precise control.
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Old 6th June 2006, 05:41 PM   #13
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One of those inverter stations for powerlines over to other countries ? Induction heating machine ?
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Old 6th June 2006, 06:18 PM   #14
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Nobody seems to have noticed that the negative half of the
output stage has what should be the Source resistors on
the Drains. Clearly this amplifier was never built.
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Old 6th June 2006, 07:02 PM   #15
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and this number of output devices could never be driven by this vas stage...

there is so much junk on the internet and we can`t help it
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Old 7th June 2006, 01:11 AM   #16
kartino is offline kartino  Indonesia
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For so high voltage level must consider the power dissipation = loss power = heat. Then the choice is only lower rails = lower impedance or class G,H and class D,T. Hence simple rails to rails is not a choice.

However for that high power (32kW) must be in speaker array and better feed by multiple amplifier. I wonder that people think to make single amp at very high power = expensive = complicated (class G,H except class D).
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Old 7th June 2006, 06:14 AM   #17
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Quote:
Originally posted by kartino
For so high voltage level must consider the power dissipation = loss power = heat. Then the choice is only lower rails = lower impedance or class G,H and class D,T. Hence simple rails to rails is not a choice.

However for that high power (32kW) must be in speaker array and better feed by multiple amplifier. I wonder that people think to make single amp at very high power = expensive = complicated (class G,H except class D).

Its not a 32kW amp, its a 7.2kW amp. And the heat would be no problem with that scaledup output stage.

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Old 7th June 2006, 06:37 AM   #18
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Quote:
Originally posted by Nelson Pass
Nobody seems to have noticed that the negative half of the
output stage has what should be the Source resistors on
the Drains. Clearly this amplifier was never built.
Exactly!
Moreover input polarities are swapped forming a positive DC feedback.
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Old 8th June 2006, 07:43 AM   #19
kartino is offline kartino  Indonesia
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at that 8 ohm load speaker array of course.
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