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Old 6th April 2013, 12:36 AM   #1
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Wink CA9 SCHEMATIC NEEDED

Hello
greetings can anyone help me with CA9 SCHEMATIC chinese amp AB CLASS
warm regards
andrew lebon
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Old 6th April 2013, 12:47 AM   #2
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Sir:

http://www.crestaudio.com/media/sche...matic_set1.pdf

please check hope this help.

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Angeltech
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Old 6th April 2013, 12:55 AM   #3
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Hi Angeltech
greetings the CA9 schematic i am looking for is the chinese version of crest audio not orignal CREST AMP its ab class 1200 watt in 2 ohms thanks for your kind help
warm regards
andrew lebon
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Old 6th April 2013, 01:07 AM   #4
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Default some pics of CA9

SUPPLY IS 120 VOLTS DC+/-
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File Type: jpg DSCN3858 [Desktop Resolution].JPG (628.7 KB, 738 views)
File Type: jpg DSCN3864 [Desktop Resolution].JPG (718.5 KB, 657 views)
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Old 6th April 2013, 08:30 AM   #5
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Is this the Circuit of CA9 china? looks it is single sided board and can be cloned easily hehehe

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Old 6th April 2013, 08:34 AM   #6
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1200W class AB @2 Ohms in with the rail is +/-120V?
It's impossible with 2SC5200/2SA1943. They have Vce is only 230V, and very small SOA.
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Old 7th April 2013, 11:08 PM   #7
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Wink CA9

TRYING to clone it will use MJL4281 and its complement
warm regards
andrew lebon
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Old 8th April 2013, 12:30 AM   #8
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nice work.....
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Old 8th April 2013, 05:22 AM   #9
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I think can get lower the rail and use MJL21193/MJL21194 to larger SOA, safety if you run they at 2R load.
ON Semi MJL21193/MJL21194 have 1.8A@100V@1sec.
100VDC can get 500W per 8 Ohms load (about 63VAC @ 8R, 8A => need 5 pairs to load 8 R and double to 4R.)
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Old 8th April 2013, 08:09 AM   #10
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Great you need not schematic I think, you already made it into reality nice job...

keep us updated...
regards,

Angeltech
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