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L20 V8
L20 V8
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Old 7th November 2011, 01:05 PM   #1
ljm_ljm is offline ljm_ljm  China
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Default L20 V8

The new version I test it will is the top level of the power amplifier simulation power amplifier.

It USES four to power tube. Positive, the reverse side.

Tests used only 2 to transistor output.

It will be a perfect power amplifier.
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Last edited by ljm_ljm; 7th November 2011 at 01:07 PM.
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Old 8th November 2011, 09:00 AM   #2
ingenieus is offline ingenieus  South Africa
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Please tell us more.
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Old 9th November 2011, 03:03 PM   #3
ljm_ljm is offline ljm_ljm  China
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it is about 250W 8R (+ -70V)
Four double transistor of the power output. Each circuit board.

Each level of all use CFP.
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Old 10th November 2011, 07:05 AM   #4
ingenieus is offline ingenieus  South Africa
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Can you post a circuit diagram, please?
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Old 11th November 2011, 11:56 AM   #5
teslar is offline teslar  Thailand
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Please showe schematic and pcb layout.
Regards.
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Old 11th November 2011, 01:27 PM   #6
astankov is offline astankov  Bulgaria
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I'm interested also to see a schematic and PCB if possible.

Regards!
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Old 18th November 2011, 02:05 AM   #7
ljm_ljm is offline ljm_ljm  China
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The new board arrived.
It will give the maximum brilliance. All of the power amplifier


Its high frequency sound like the ocl amplifier as 300 B.

With great power 250 W 8 R output.

Its temperature is very low.
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Old 18th November 2011, 10:37 AM   #8
ingenieus is offline ingenieus  South Africa
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The boards look nice.

That is about all I can say.
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Old 21st November 2011, 05:17 PM   #9
astankov is offline astankov  Bulgaria
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Interesting! Can't see a thermal sensor on the heatsink.
You say temperatures are very low - how did you bias the outputs?
And again can we see a schematic please?
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Old 13th December 2011, 12:15 PM   #10
rickedd46 is offline rickedd46  United States
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ljm_ljm,

How many versions of the L20 are there? I saw a L20, V7, V9 and others on ebay

Which one is better?

And why?

Thanks.
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