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Old 9th August 2006, 01:42 PM   #1
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Default Class AB+D schematics

I want to build an amplifier in this class. I see on Yamaha, Sunfire, Bash, and probably others. But i not found any concrete schematics. Is anyone who have this sch?
L.E. The most big amplifier i have made it, is supply +/-145v class H, 4 tier (+/-50, 85, 110, 145v)
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Old 10th August 2006, 03:48 AM   #2
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Default Re: Class AB+D schematics

Quote:
Originally posted by ionutgaga
L.E. The most big amplifier i have made it, is supply +/-145v class H, 4 tier (+/-50, 85, 110, 145v)
Hi,
Switched rail or Modulated rail, which type did you made in Class-H.....
As you say its 4 Tier, it must be a Switched Rail type, is it full range or Subwoofer amplifier...Would you share the schematic....
regards,
K a n w a r
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Old 10th August 2006, 07:04 AM   #3
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Switched rail, as you see (+/-50, 85...). The switched schematic is from QSC PL6, PL9. The audio is from ElectroVoice P3000 (floating grounded bridge). In time i will post the full schematic and photos.
Is verry efficient, comparative to EV P3000 (class AB), is smaller, transient response is better.
I see EV, Dynacord build class AB, then class H 2 tier, now class H 3 tier. The next step is probably modulated power supply (AB+D).
My wish is to build this class (maybe +/-150v, modulated offcourse). And please email me anything about this class, if you wish.

L.E. My most big amplifier drive cool 4 x PD1850 (mounted in pair in planar wave guide)

L.L.E. Where do i find romanian-english translator?
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Old 10th August 2006, 07:04 AM   #4
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The schematics
Attached Files
File Type: pdf h+ final sch.pdf (17.9 KB, 1441 views)
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Old 10th August 2006, 07:48 AM   #5
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The schematics
Attached Files
File Type: pdf h+ drive sch.pdf (39.8 KB, 950 views)
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Old 10th August 2006, 09:05 AM   #6
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The schematics
Attached Files
File Type: pdf floating drive sch.pdf (34.7 KB, 770 views)
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Old 10th August 2006, 10:05 AM   #7
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The schematics
Attached Files
File Type: pdf floating final sch.pdf (16.5 KB, 611 views)
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Old 10th August 2006, 10:34 AM   #8
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The schematics
Attached Files
File Type: pdf pwm schematic.pdf (29.1 KB, 861 views)
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Old 10th August 2006, 10:40 AM   #9
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The schematics
Attached Files
File Type: pdf thd sch.pdf (39.7 KB, 695 views)
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Old 10th August 2006, 10:51 AM   #10
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The schematics
Attached Files
File Type: pdf protect sch.pdf (22.9 KB, 621 views)
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