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Old 26th April 2011, 12:00 AM   #1001
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This is my PCB with Laci's change on LM311 part. This board can take TO220 and TO247 fets. Also has DC protection, turn on and off speaker with delay, clip and signal indicator. Also has temperature protection (80 deegres) with sensor KTY81-122 (conection 1 and 2) for output coil or hetsink.

Protection is with 24V 30A relay. AC conector is for ACvoltage from transformer for turn on and of speaker with delay

Fets are under PCB. Under PCB are wires from leds to 10pin conector. TIP41c has his own heatsink and "big" resistor are in vertical position.

Output coil is on conector 5mm 40A (filter) in the air one inch above PCB

Dimension are 8.5cm x 10.5cm
Attached Images
File Type: png Raspored rev2.png (71.6 KB, 1838 views)
File Type: png real world.png (61.8 KB, 1754 views)
File Type: png Izgled.png (104.8 KB, 1688 views)

Last edited by Dzony988; 26th April 2011 at 12:03 AM.
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Old 26th April 2011, 10:32 AM   #1002
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hi drosny, could you post also the schematics, and the pcbwizard files
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Old 26th April 2011, 01:25 PM   #1003
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Hi, will IRF6667 MOSFETS do for ±57V operation ?
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Old 26th April 2011, 02:08 PM   #1004
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Sorry, I meant IRF6668..
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Old 26th April 2011, 02:14 PM   #1005
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Anyone have a proper protection+startup schematic with shutdown pin in use?
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Old 26th April 2011, 10:02 PM   #1006
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Quote:
Originally Posted by electroconico View Post
I've received my boards , they look great for me .
I´ll need time xD to build them.

regards!

ty ejtagle!
Quote:
Originally Posted by luka View Post
hope it works, build and test and report back
I´m testing it at 25vdc with irfp460(i just have a bunch of them).
Originals values used.
Oscillating at 100KHz. I´ll change the 100pF instead of 330pF.
I want to see how it works with original parts and mods.
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File Type: jpg DSC01932.JPG (800.7 KB, 1513 views)
File Type: jpg DSC01893.jpg (293.1 KB, 853 views)
File Type: png Filter_out_1KHz.png (20.0 KB, 822 views)
File Type: png Oscillating_output_100KHz.png (6.5 KB, 451 views)

Last edited by electroconico; 26th April 2011 at 10:08 PM.
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Old 27th April 2011, 12:07 AM   #1007
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My amp is done! Good sound and powerfull.

+-70V 4ohm load for bass bins
Two transformers (C core, 400W each) one for + and one for - rail
260KHz resonate freq.
IRFB4227 on output
(pictures in Amp.zip)

I posted PCBWizard file for my PCB. Its bacis schematic, but 330pF is 100pF, 27R gate resistors are 22R, UF4004 is MUR120 and input part with LM311 is in normal conection for high swiching freq.(Laci's schematic).Output capacitor is 1uF and output coil is 22uH.
If someone want to build this pcb with protection, tell me, because protection has R1...R8 resistors for different voltages (form +-20 to +-95V), cliping reference too for different voltages (board.zip)
Attached Files
File Type: zip Amp.zip (961.2 KB, 1092 views)
File Type: zip Board.zip (17.0 KB, 681 views)

Last edited by Dzony988; 27th April 2011 at 12:16 AM.
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Old 27th April 2011, 12:24 AM   #1008
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Nice Amp.

It Looks great Dzony.

Big subwoofers , What is the rated power for those subwofers?
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Old 27th April 2011, 12:54 AM   #1009
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Thanks electroconico.

Thats Pioneer 307d2 12" (2x2ohm 400W RMS 1200W peak)
I use activ crosover on 120Hz

Speaker box is transmision line with two of Pioneer's in serial (8ohm), and twoo of these are in pararlel for 4 ohm. Very loud and powerful bass, whole house is shaking on half power
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Old 27th April 2011, 06:22 AM   #1010
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Quote:
Originally Posted by ghabrius View Post
Sorry, I meant IRF6668..
IRF6668 is rated for 80V, so no.
But how can you solder DirectFETs ???
I use relay output protection, so it protects for startup and poweroff transients too.
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