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#1 |
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diyAudio Member
Join Date: Sep 2007
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hi, i have a output stage of Sony Str-de495 with burned board and Power supply, so i tooked out its power stage made of 5 pairs MN2488 and MP1620, which are, as you probably know 2SD2488 and 2SB1620s
I have measured all of them, and all seems to be fine now i wanna build some dual mono or just mono, whatever, and need some schematic because I`m not that expert to do that by myself, on net i can not find anything, so ih you can help me i would be very grateful here are some pics: http://www.imagesforme.com/out.php/i41006_SPA0041.jpg http://www.imagesforme.com/out.php/i41005_SPA0042.jpg |
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#2 |
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diyAudio Member
Join Date: Mar 2005
Location: Sunnyvale
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These are the good candidates for building amp with LM4702 chip. I've built one they sound decent
Routhun
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routhun |
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#3 |
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diyAudio Member
Join Date: Sep 2007
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ok, but i need some schematic, i really don`t have idea how to build that thing
I was looking at some "standard" solid state amps and figured out that this darlington can replace driver+power transistor, but not sure which schematic to take "as a sample" please help someone, thanks EDIT ok, i see what you (probably) thought, I found LM4720 datasheet and sow darlingtons in power stage, can I use that Schematic or there are some more developed? |
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#4 |
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diyAudio Member
Join Date: Mar 2005
Location: Sunnyvale
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Use the schematic in National Semiconductor LM4702 data sheet, also search in chip amps forum for LM4702, you'll get enough information about LM4702.
Hope this helps, routhun
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routhun |
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