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Old 11th November 2012, 06:02 AM   #1701
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no one answer!
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Old 11th November 2012, 06:50 AM   #1702
44250 is offline 44250  Serbia
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use any protection and instead relay put a resistor. than the voltage on it use as protection signal that will turn something on/off.
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Old 11th November 2012, 11:11 AM   #1703
AndrewT is online now AndrewT  Scotland
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and if the driver is set to a 10mA bias or a 50mA bias then To220 temperatures will be very different.
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regards Andrew T.
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Old 11th November 2012, 07:46 PM   #1704
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Quote:
Originally Posted by 44250 View Post
use any protection and instead relay put a resistor. than the voltage on it use as protection signal that will turn something on/off.
thanks friend for your answer
i want to conect this protection to my micro project
this three board must be seperat of them
i have 5 amp in one box and i must have 15 protection for those
for every one amp 3 protection:
1. DC protect
2. over curent protect
3. short circut protect
i need 15 optocupler for this 15 protection
sorry for my english
are you underestand?
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Old 21st November 2012, 07:18 PM   #1705
cjkpkg is offline cjkpkg  United States
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Excited to give this one a try...just etched my boards...
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Old 21st November 2012, 09:27 PM   #1706
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Originally Posted by Riff View Post


Nice design sir RIFF, can i have the pcb design of this amp sir?
Thanks!


borbon70
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Old 22nd November 2012, 02:22 AM   #1707
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hi apex sir,
maximum how many output pairs can i add to ax14? because i increase bias emiter resistor voltage to 20mv, outputs are little hot. can i increase the dc voltage to increase power.? any changes to make.?
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Old 22nd November 2012, 08:16 AM   #1708
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Quote:
Originally Posted by nazirdigi View Post
hi apex sir,
maximum how many output pairs can i add to ax14? because i increase bias emiter resistor voltage to 20mv, outputs are little hot. can i increase the dc voltage to increase power.? any changes to make.?
Use AX20 schematic and add 2 more pairs ( 4 pairs total ), DC rail voltage with 4 pairs increase to +/-80V and you have 400W/4R amp.
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Old 22nd November 2012, 12:25 PM   #1709
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Originally Posted by apexaudio View Post
Use AX20 schematic and add 2 more pairs ( 4 pairs total ), DC rail voltage with 4 pairs increase to +/-80V and you have 400W/4R amp.
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thank u sir for the reply,
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Old 22nd November 2012, 01:09 PM   #1710
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hi qq12e5k1,
can u share this layout in pdf format.
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File Type: jpg AX-20 3 pair.jpg (241.8 KB, 935 views)
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