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Old 9th February 2013, 04:07 PM   #3311
akraj is offline akraj  Bangladesh
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Quote:
Originally Posted by andrewlebon View Post
Hi Akraj
greetings same design as posted in forum to make a proper d class amp FIRST get
a proper core then attempt to make a d class amp all yours problems will be solved
warm regards
andrew lebon
Hi Andrew:

Can I have appropriate core at Calcutta?

Thanks
Raj
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Old 9th February 2013, 08:15 PM   #3312
IRSound is offline IRSound  Germany
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Quote:
Originally Posted by andrewlebon View Post
amp at 110 dc volts+/-
Hi ,

which FETs did you choose for this voltage ?
anyway , i just wondered how you can get good result with that smps (long wires to transformer ,....)
what is the benefits of toroidal core in this type of smps ?

_________________________________________

guys..
FDA69N25 have large Qrr which take effect on amp THD and efficiency.
what should we do then ?

Crown also using Fairchild FETs for XLS Drive core series.
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Old 26th February 2013, 10:27 AM   #3313
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Location: Warsaw
Hi!
Is there any PCB, schematic and other files of IRS3000/1500 without errors in layout?I
I'm gonna build this amp, but i heard about some problems with resistors near tl071, unconnected capacitors and other problems. What Voltage rails should i use to achieve 3000 and 1500 Watts? Which part values vary depends on supply voltage? I have access to toroid cores -2 material, and other stuff, so i'd like to start with this amp.
Thanks
Adam.
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Old 1st March 2013, 09:18 AM   #3314
highand is offline highand  Hungary
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Simple D class amplifier non smd part, without feedback.

http://www.hobbielektronika.hu/forum....php?id=191446

http://www.hobbielektronika.hu/forum....php?id=191441

Click the image to open in full size.
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Old 1st March 2013, 10:14 AM   #3315
highand is offline highand  Hungary
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More simple d class amplifier, without feedback.
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File Type: jpg PWM áTFOGó VISSZACSATOLáS NéLKüL.JPG (86.7 KB, 894 views)
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Old 1st March 2013, 04:23 PM   #3316
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Send a message via Yahoo to ionutzxpo
hi ,highand can you tell us some THD numbers? 0.0000X%? oscilating frecvency,can be made only with N chanel mosfets?
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Iacob Ionut
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Old 2nd March 2013, 06:34 PM   #3317
highand is offline highand  Hungary
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Quote:
Originally Posted by ionutzxpo View Post
hi ,highand can you tell us some THD numbers? 0.0000X%? oscilating frecvency,can be made only with N chanel mosfets?
This circuit is TDH 0.1% high mark and TDH 0,3% low mark ( cross distortion). Possible to build only N-channel FET, such as Philips gate drive circuit.
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Old 2nd March 2013, 07:18 PM   #3318
highand is offline highand  Hungary
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Quote:
Originally Posted by ionutzxpo View Post
hi ,highand can you tell us some THD numbers? 0.0000X%? oscilating frecvency,can be made only with N chanel mosfets?
This circuit is TDH 0.1% high mark and TDH 0,3% low mark ( cross distortion). Possible to build only N-channel FET, such as Philips gate drive circuit.
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Old 2nd March 2013, 07:20 PM   #3319
highand is offline highand  Hungary
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This is the UcD version.
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File Type: jpg PWM UCD.JPG (74.7 KB, 819 views)
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Old 3rd March 2013, 09:22 AM   #3320
akraj is offline akraj  Bangladesh
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Default Revised PCB for AUD600 Ver1.0

Any comment!

Corrected few missing tracks and on board BIAS regulator!

Credit goes to MANOJ!
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File Type: zip 002. AUD600 Ver1.0.zip (183.4 KB, 374 views)
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