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#1 |
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diyAudio Member
Join Date: Oct 2004
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Hi,
has anyone got schematic, PCB, documentation, etc... for this amplifier? As I know, it was sold as a kitset. Any information helps. Thanks a lot, |
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#2 |
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diyAudio Member
Join Date: Jun 2004
Location: manila
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norstar815 |
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#3 |
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diyAudio Member
Join Date: Apr 2006
Location: Vojvodina,Senta
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Hi! I couldn't E-mail you, so I'm trying this way to contact you.
I noticed that you posted a schematic of the Castone CPA amplifier. I was wondering if you could help me about the older type of amp, it is CPA1200, about 10 or 15 years old.Can you help me find a scheme for it? HELP! Thanks!!! |
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#4 |
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diyAudio Member
Join Date: Oct 2004
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Hi,
yeah, I know that amplifier, the Castone CPA-1200. These were manufactured about 1990. But bad news: here in Hungary nobody has the schema of it. I wanted to "draw back" the shema, but I never had a CPA-1200 that I allowed to open. When I was collecting hungarian PA-amplifier schematics, I tried to get schematics from the manufacturer (Castone), but they didn't give me any one. The only thing I know of that model, that it's using about +/-100V rails, and the output stage is serial-quasicomplementary with NPN devices. On the margin, I would help you really gadly, so if you have any question, let's ask it! All the best, |
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#5 |
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diyAudio Member
Join Date: Oct 2004
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Hi,
I talked with a woman from the Castone. She said the following: - if the output stage blowen, let's use MJ15003 (onlie geunie Onsemi, be careful with fake transistors!) instead the KD503's. - for driver let's use MJE15030 At startup let's use a 60W bulb in serial with the primer of the mains transformer! Regards, |
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