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500W PA amplifier with Limiter
500W PA amplifier with Limiter
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Old 21st February 2019, 11:28 AM   #3421
macd is offline macd  South Africa
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Default B500 Protect PCB...

Protect PCB for B500...
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Old 21st February 2019, 02:48 PM   #3422
44250 is offline 44250  Serbia
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very very nice!
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Old 21st February 2019, 07:10 PM   #3423
donpetru is offline donpetru  Romania
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Quote:
Originally Posted by apexaudio View Post
You can use PSU7 only with B500P
However, the D3 diode is not connected correctly !!!
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Old 21st February 2019, 09:05 PM   #3424
student II is offline student II
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Default To masters

I found this pcb from internet. I converted from pdf to lay6.But my experience not enough to build and I did not to be sure,it is true or not. therefore I'am asking to masters. İf it is possible please can you check it

sorry for my bad english
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Last edited by student II; 21st February 2019 at 09:08 PM.
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Old 22nd February 2019, 09:42 AM   #3425
kandimba is offline kandimba  Portugal
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Quote:
Originally Posted by donpetru View Post
However, the D3 diode is not connected correctly !!!
Yes, D3 must be inverted as you can see in Apex components PCB.
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Old 22nd February 2019, 02:54 PM   #3426
donpetru is offline donpetru  Romania
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Quote:
Originally Posted by kandimba View Post
Yes, D3 must be inverted as you can see in Apex components PCB.
A nasty PCB, without numbered parts ... could be better. However, the schematic should be in correlation with PCB.

A nicer PCB is the one posted by @student II although the distance between PCB tracks should be checked there!!!

Regarding the schematic, you would need a resistor or jumper between SGND and GND, very useful especially if we want to test only PCB amplifier.

Fuses should protect all the amplifier. I'm saying this because in my experience I had customers who have dropped cognac inside the amplifier - through the air vents of the casing - and so there was a short circuit in the VAS circuit. The lack of fuses to interrupt this was useful because it limited the damage. So you never know who you sell your amplifier !!! There are rare cases, but they can exist!
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Old 8th March 2019, 06:23 AM   #3427
fuego is offline fuego
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Hi

can anyone share schematic Led VU meter ?


Thanks
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