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Old 20th May 2010, 10:15 PM   #111
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I must find and share newer version of this PSU with soft-start for transformer and 35A bridge rectifier on PCB.
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Old 25th May 2010, 01:19 PM   #112
maouna is offline maouna  Greece
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it would be quite useful...
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Old 25th May 2010, 07:57 PM   #113
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I like to see pictures of builded PSU or amp, this is reason for share, and I will post what you want from my arhive. I have lots of my old projects, and I want post only most useful for diy.
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Last edited by apexaudio; 25th May 2010 at 08:01 PM.
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Old 25th May 2010, 09:31 PM   #114
maouna is offline maouna  Greece
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here is the psu ,but without the overcurrent protection parts.ithis space i want to put the 35Α bridge rectifier
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File Type: jpg IMG_0226.JPG (664.2 KB, 4049 views)
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Old 25th May 2010, 10:26 PM   #115
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Quote:
Originally Posted by maouna View Post
here is the psu ,but without the overcurrent protection parts.ithis space i want to put the 35Α bridge rectifier
Put the 35A bridge rectifier on case and connect with wires from pcb. Overcurrent protection is very adventage circuit and I suggest to use it, this short circuit protect cut out speakers even at low volume level, you can use amplifier without rail fuses and VI limiter with this protect safely.
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Old 26th May 2010, 12:17 PM   #116
maouna is offline maouna  Greece
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the overcurrent protection at your design ,only checks current at positive rail.what about negative rail ?isnt it necessary?
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Old 26th May 2010, 01:04 PM   #117
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Quote:
Originally Posted by maouna View Post
the overcurrent protection at your design ,only checks current at positive rail.what about negative rail ?isnt it necessary?
No, audio signal is AC current from 20Hz to 20000Hz, there is 20 peak current per sec minimum, and it's simetrical in positive and negative rail, it's not necessary checks current in both rail like with DC current.
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Old 27th May 2010, 12:58 PM   #118
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here is the psu ,but without the overcurrent protection parts.ithis space i want to put the 35Α bridge rectifier
Can you post picture in high resolution?
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Old 27th May 2010, 01:10 PM   #119
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I must find and share newer version of this PSU with soft-start for transformer and 35A bridge rectifier on PCB.
I find this
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File Type: jpg APEX Soft-Start PSU.jpg (472.8 KB, 3512 views)
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Old 27th May 2010, 06:39 PM   #120
maouna is offline maouna  Greece
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this is the best i can get with my phone camera .its night here now.

i havent tested the psu yet.i will connect the 35A rectifier and put back the short circuit protection.

do you suggest 0.22ohm resistors for short circuit protection ? i am using a 24-0-24 volt /200VA transformer which is +-33 volt dc after rectification and smoothing capacitors.
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Last edited by maouna; 27th May 2010 at 06:47 PM.
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