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Sansui BA-303
Sansui BA-303
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Old 1st January 2011, 10:19 PM   #1
CrewBies is offline CrewBies  Europe
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Default Sansui BA-303

Hi
I'am looking for service manual or just schematic for Sansui BA-303 valve amplifier can somebody help me?
Sebastian
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Old 2nd January 2011, 12:34 PM   #2
LinuksGuru is offline LinuksGuru  Europe
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I have schematic, I'll upload it to my web site
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Old 3rd January 2011, 04:50 PM   #3
CrewBies is offline CrewBies  Europe
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Can you send me yours web site adress or send it to my email please?
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Old 3rd January 2011, 10:23 PM   #4
LinuksGuru is offline LinuksGuru  Europe
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Hi! I have uploaded schematic you have asked for. It is available on my blog:

Download Schematics & Service Manuals | MacGuru HQ
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Old 7th January 2012, 06:07 AM   #5
ymwong is offline ymwong  United States
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Sansui BA-303
Hi,

Would you mind giving a link to your blog? I am looking for the service manual.

Thanks.
ym
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Old 7th January 2012, 09:45 AM   #6
LinuksGuru is offline LinuksGuru  Europe
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Download Schematics & Service Manuals | MacGuru HQ

Its here. I have only schematic, sorry. Judging from other Sansui service manuals, there is nothing really useful anyway.

BTW, I would suggest you to build AU-111 instead.
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Old 7th January 2012, 04:53 PM   #7
ymwong is offline ymwong  United States
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Sansui BA-303
Can you elaborate on why the AU-111 is better? Do they use the same transformers?

ym
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Old 7th January 2012, 07:22 PM   #8
ymwong is offline ymwong  United States
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Sansui BA-303
Found schematic of the AU-111, 6L6 with cathode feedback windings. Is that why it is better?

ym
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Old 7th January 2012, 10:43 PM   #9
LinuksGuru is offline LinuksGuru  Europe
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Yes, CFB, and better construction overall.
I have built it with my own transformers and 6550 instead of 6L6GC.
50W RMS, very low distortions at power less <= 10W.

PS. You can transform AU-111 into ulra-linear if you don't have transformer with separate CFB winding. It will change sonic signature, however.
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