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Old 13th February 2011, 11:00 AM   #11
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Quote:
Originally Posted by tiefbassuebertr View Post
is it this magazine (not the issue of the pic) about follow URL ??
Everyday Practical Electronic Magazine December 2007 Full Software Downloads - Download For All
is this topology comparable to Hypex UcD ??
No , this is from Poland 'Praktikal Elektronik' magazine 1/2001.
This is classic topology with error amp, triangle oscilator and comparator, not self oscilating topology like UcD.
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Old 13th February 2011, 11:17 AM   #12
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I find nice UcD amp like Hypex in service manual of philips mini system, pcb is for stereo but with SMD parts.
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File Type: jpg Philips UcD sch.JPG (86.7 KB, 3361 views)
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Old 13th February 2011, 12:18 PM   #13
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Originally Posted by apexaudio View Post
DIY friendly +/-50V SMPS PSU with two transformers recicled from ATX PSU.
Have tou try that SMPS???
Could it be use for B500??
Regards
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Old 13th February 2011, 12:29 PM   #14
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Default SMPS

have you try that SMPS??
could it be use for B500??

Regards
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Old 13th February 2011, 12:38 PM   #15
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Quote:
Originally Posted by QQ12e5k1 View Post
Have tou try that SMPS???
Could it be use for B500??
Regards
No, it can be use for 150W amps, I find this on YouTube: http://www.youtube.com/watch?v=rXwqFiZ0sJE
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Old 13th February 2011, 12:50 PM   #16
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Default SMPS

Actually I wanted to make a SMPS for PA but I am afraid that the leakage current in the psu or something like a PC.
There are solutions to this problem?
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Old 13th February 2011, 01:10 PM   #17
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Default SMPS

Actually I wanted to make a SMPS for PA but I am afraid that the leakage current in the psu or something like a PC.
There are solutions to this problem?
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Old 13th February 2011, 05:38 PM   #18
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Originally Posted by QQ12e5k1 View Post
Actually I wanted to make a SMPS for PA but I am afraid that the leakage current in the psu or something like a PC.
There are solutions to this problem?
U can use case of PC PSU for your SMPS, and find more information about leakage current... http://www.eetindia.co.in/ARTICLES/2...URCES=DOWNLOAD
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Old 13th February 2011, 11:49 PM   #19
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I did a similar project using a TL082 triangle wave generator, LM319 comparator, XOR gates phass splitter and IR2113 mosfet driver.
I didnt use any feedback at all yet it sounded great.

The only minor problem I found was I needed to null the DC offset using a pot or i got low level hum. Must have been an inaccuracy somewhere in the line.
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PCBCAD50 software. http://www.murtonpikesystems.co.uk
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Old 14th February 2011, 01:20 AM   #20
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Quote:
Originally Posted by nigelwright7557 View Post
I did a similar project using a TL082 triangle wave generator, LM319 comparator, XOR gates phass splitter and IR2113 mosfet driver.
I didnt use any feedback at all yet it sounded great.

The only minor problem I found was I needed to null the DC offset using a pot or i got low level hum. Must have been an inaccuracy somewhere in the line.
Feedback is only for DC servo on this amp.
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