Sansui BA-303

CrewBies · 1st January 2011, 10:19 PM

Hi
I'am looking for service manual or just schematic for Sansui BA-303 valve amplifier can somebody help me?
Sebastian

LinuksGuru · 2nd January 2011, 12:34 PM

I have schematic, I'll upload it to my web site

CrewBies · 3rd January 2011, 04:50 PM

Can you send me yours web site adress or send it to my email please?

LinuksGuru · 3rd January 2011, 10:23 PM

Hi! I have uploaded schematic you have asked for. It is available on my blog:

Download Schematics & Service Manuals | MacGuru HQ

ymwong · 7th January 2012, 06:07 AM

Hi,

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

Thanks.
ym

LinuksGuru · 7th January 2012, 09:45 AM

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.

ymwong · 7th January 2012, 04:53 PM

Can you elaborate on why the AU-111 is better? Do they use the same transformers?

ym

ymwong · 7th January 2012, 07:22 PM

Found schematic of the AU-111, 6L6 with cathode feedback windings. Is that why it is better?

ym

LinuksGuru · 7th January 2012, 10:43 PM

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.

1st January 2011, 10:19 PM	#1
CrewBies diyAudio Member Join Date: Aug 2009	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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2nd January 2011, 12:34 PM	#2
LinuksGuru diyAudio Member Join Date: Aug 2008	I have schematic, I'll upload it to my web site

3rd January 2011, 04:50 PM	#3
CrewBies diyAudio Member Join Date: Aug 2009	Can you send me yours web site adress or send it to my email please?

3rd January 2011, 10:23 PM	#4
LinuksGuru diyAudio Member Join Date: Aug 2008	Hi! I have uploaded schematic you have asked for. It is available on my blog: Download Schematics & Service Manuals \| MacGuru HQ

7th January 2012, 06:07 AM	#5
ymwong diyAudio Member Join Date: Jan 2003 Location: california	Hi, Would you mind giving a link to your blog? I am looking for the service manual. Thanks. ym

7th January 2012, 09:45 AM	#6
LinuksGuru diyAudio Member Join Date: Aug 2008	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.

7th January 2012, 04:53 PM	#7
ymwong diyAudio Member Join Date: Jan 2003 Location: california	Can you elaborate on why the AU-111 is better? Do they use the same transformers? ym

7th January 2012, 07:22 PM	#8
ymwong diyAudio Member Join Date: Jan 2003 Location: california	Found schematic of the AU-111, 6L6 with cathode feedback windings. Is that why it is better? ym

7th January 2012, 10:43 PM	#9
LinuksGuru diyAudio Member Join Date: Aug 2008	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.