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Old 10th September 2012, 04:24 PM   #2511
CPX is offline CPX  Romania
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Manoj:
What kind of resitive divider you have used?
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Old 10th September 2012, 04:31 PM   #2512
manojtm is offline manojtm  India
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Quote:
Manoj:
What kind of resitive divider you have used?
CPX
i used series 4k7 ground 6k8 with 1nF (2) series 4k7 ground 4k7 with 1nF (3) series 10k ground 6k8 with 1nF (4) series 1k ground 6k8 with 1nF

today i directly connected to input with very low volume, unfortunately my sound card damaged.

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MANOJ
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Old 10th September 2012, 04:34 PM   #2513
CPX is offline CPX  Romania
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For initial tests a 1/10 divider with 100 nanofarads to ground is enough.
NEVER connect directly, of course you sound card got damaged.
Also never make connectios while both amplifier and computer are on.
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Old 10th September 2012, 05:50 PM   #2514
exflaco is offline exflaco  Armenia
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Manojtm, schem and pcb 4all diyers please
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Old 10th September 2012, 11:05 PM   #2515
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???? D-class 1200w.mp4 - YouTube
that is amp in the few posts upper i started him its cool but need delay for good start
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Old 12th September 2012, 08:23 AM   #2516
manojtm is offline manojtm  India
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Hi CPX

Today i got Yorkville schematic comparing with my circuit its all most same what i did
so i quit THD measure( save my new sound card ) if you need schema i will send you

Regards
Manoj
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Old 12th September 2012, 09:36 AM   #2517
manojtm is offline manojtm  India
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Hi All
Yorkville ls800 (1500W 18" Sub woofer) using lm311/555/ir2110/ir2110/IRFP31N50 +130V -130V bridge config.

regards
MANOJ
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Old 12th September 2012, 10:52 AM   #2518
exflaco is offline exflaco  Armenia
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Default Yorkville free

http://www.yorkville.com/downloads/servman/smls801p.pdfYorkville all model free4all in the web page 145v igbt out non ucd limiter (13600)ocp
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Old 12th September 2012, 01:30 PM   #2519
CPX is offline CPX  Romania
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Manoj:
This in not a solution, THD depends on implementation not on schematics used..With correct divider and ground connections there is no danger for the sound card.

Last edited by CPX; 12th September 2012 at 01:56 PM.
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Old 12th September 2012, 02:29 PM   #2520
manojtm is offline manojtm  India
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Hi exflaco

that carrier based class d using fsw=@80KHz Max. IGBT freq. is 150KHz

Regards
Manoj
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