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Old 6th January 2013, 08:53 AM   #231
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Default D200 +/-75V

With +/-75V DC rail voltage 2k2/2W are very hot, but it's ok. BD241C must have heatsink.
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Old 6th January 2013, 12:44 PM   #232
IRSound is offline IRSound  Germany
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Mile ,

This is your own amp ?
which mosfet did you use for +/-75v ? how was the sound and quality then ?
it's beter to use 3W instead of 2W !

i found some amps on Russian language forums , with LM311 instead of TL081 and some difference in design , did you see them ?
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Old 6th January 2013, 04:32 PM   #233
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Quote:
Originally Posted by IRSound View Post
Mile ,

This is your own amp ?
which mosfet did you use for +/-75v ? how was the sound and quality then ?
it's beter to use 3W instead of 2W !

i found some amps on Russian language forums , with LM311 instead of TL081 and some difference in design , did you see them ?
I use IRF640N for test with 8 ohms speaker, sound is hi-fi quality and mosfets is just warm without heatsink (work at over 100W ).
Russian amp is UCD topology and D200 is IRAUDAMP1 topology.
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Old 6th January 2013, 06:07 PM   #234
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Hi
can you use D200 for subwoofer without problem ?
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Old 6th January 2013, 08:24 PM   #235
IRSound is offline IRSound  Germany
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Quote:
Russian amp is UCD topology and D200 is IRAUDAMP1 topology.
Thanks Mile ,
where can i find difference between this two topologies ? I really want to understand how they work...but i cant find a short and good article about this..if you don't mind , please give me some lessons.

i'm going to build this amp , as soon as possible !!

Regards,
IRSound
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Old 6th January 2013, 08:34 PM   #236
exflaco is offline exflaco  Armenia
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Irsound could share these russian page links? thanks.
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Old 6th January 2013, 08:57 PM   #237
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Quote:
Originally Posted by Hadighorbani View Post
Hi
can you use D200 for subwoofer without problem ?
Yes, sound is very powerfull on sub.
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Old 6th January 2013, 09:55 PM   #238
IRSound is offline IRSound  Germany
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Quote:
Irsound could share these russian page links? thanks.=
Hi Exflaco , i found that picture in google image search. i don't remember which forum was it.

but i think mile upload their schematic before. LM311+74AC00+IR2110
he changed modulator section with mackie. i upload those schematics for you.
why you aren't try D200 ?

mile , i forgot to ask another question..why you aren't put large electrolyt capacitor behind fets ? because of bus pumping effect..IRF always use this caps in their designs. or other project like irs series , etc.

Regards,
IRSound
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File Type: jpg Schemaclassd.jpg (39.8 KB, 649 views)
File Type: jpg Mackie SRM450.JPG (51.3 KB, 601 views)
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Old 7th January 2013, 09:08 AM   #239
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Default Hi sir mile

Quote:
Originally Posted by apexaudio View Post
Yes, sound is very powerfull on sub.
Hi
please share a very good quality picture from your amp
i want chek your amp parts and my amp too
maybe i have problem in filter zone. right ?
thanks
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Old 7th January 2013, 10:15 AM   #240
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Quote:
Originally Posted by IRSound View Post
Hi Exflaco , i found that picture in google image search. i don't remember which forum was it.

but i think mile upload their schematic before. LM311+74AC00+IR2110
he changed modulator section with mackie. i upload those schematics for you.
why you aren't try D200 ?

mile , i forgot to ask another question..why you aren't put large electrolyt capacitor behind fets ? because of bus pumping effect..IRF always use this caps in their designs. or other project like irs series , etc.

Regards,
IRSound
With my PCB design no need for large electrolyt capacitor behind fets on pcb just in PSU, and I use 470nF and 2X 220nF on pcb.
Regards

Last edited by apexaudio; 7th January 2013 at 10:21 AM.
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