Sansui 9900/11000 Recap
- Thread starter Fredrik 1977
- Start date
Fredrik 1977
Super Member
just thought id report back now that the amp is finished.
idle and offset adjusted perfectly, i played music for an hour and did final adjustments.
just have to say that this was one of the most well designed amps i´ve worked on. really superb enginering!
and the sound coming from it is nothing short of amazing!
all electrolytic capacitors were replaced with panasonic FC and Nichicon UVP (bipolar ones)
all 2sa726/2sc1313 were replaced with BC327/337
4 DS-430 diodes were replaced with 1N4148 on the driverboard
6 1uf bipolar electrolytic was replaced with wima MKS2 in the riaa and tone controls.
protection relay replaced with Finder 55.34.9.024.0040 and adapter socket
some final pictures
rcaped driver board
80mm in height is pretty much the max you could use in here
idle and offset adjusted perfectly, i played music for an hour and did final adjustments.
just have to say that this was one of the most well designed amps i´ve worked on. really superb enginering!
and the sound coming from it is nothing short of amazing!
all electrolytic capacitors were replaced with panasonic FC and Nichicon UVP (bipolar ones)
all 2sa726/2sc1313 were replaced with BC327/337
4 DS-430 diodes were replaced with 1N4148 on the driverboard
6 1uf bipolar electrolytic was replaced with wima MKS2 in the riaa and tone controls.
protection relay replaced with Finder 55.34.9.024.0040 and adapter socket
some final pictures
rcaped driver board
80mm in height is pretty much the max you could use in here
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Fredrik 1977
Super Member
well it turns out this will be sort of a 9900 vs 11000 thread since 2ch picked up his amp and left a 11000.
im somewhat thrilled about this! the info i gathered from the schematic/manual wich is pretty much the "same" for both amps.
11000 has a bigger transformer?
11000 has 10000uf maincaps instead of 6800uf
11000 has a slightly larger heatsink ( i can see it thruough the air vents) i havent opend it up yet, its in que.
im somewhat thrilled about this!
the info i gathered from the schematic/manual wich is pretty much the "same" for both amps.11000 has a bigger transformer?
11000 has 10000uf maincaps instead of 6800uf
11000 has a slightly larger heatsink ( i can see it thruough the air vents) i havent opend it up yet, its in que.
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Fredrik 1977
Super Member
A Captured Moment of exchange
au-9900 left & au-11000 right
au-9900 left & au-11000 right
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There seems to be quite a few component value changes, the combined effect is to make the amplifier slightly more powerful. As for the transformer, they might have used the same one, but a way to check is look at the Sansui part number of the respective transformer in the SM - this will tell you if they are different.
Fredrik 1977
Super Member
there are higher voltages on the secondary side of the Au-11000 transformer in the schematics.
Fredrik 1977
Super Member
in reallity one could stuff a 11000 trafo in a 9900 and get a 30wpc turbo?
I wouldn't advise it
- because of the other changes already mentioned.And, would it be worth it? AU-9900 80wpc, AU-11000 110wpc - thus not worth the effort.
Fredrik 1977
Super Member
im just speculating
Fredrik 1977
Super Member
my guess is the more powerful trafo does it, and to compensate they have made the heatsink 10-15mm higher. and thrown in some 10k caps.
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Fredrik 1977
Super Member
also have to say i´m very biased when it comes to sansui. my father had a au-20000 around 1994-95 and he sold it, wich has proven to be a big mistake
i own 2 sansui of my own a 7500 (awesome 30wpc) and a 3900 (wich might be a fix-up thread in the future) its a wreck.
i own 2 sansui of my own a 7500 (awesome 30wpc) and a 3900 (wich might be a fix-up thread in the future) its a wreck.
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Fredrik 1977
Super Member
another thing i´ve noticed is the 9900 was a multi votage unit 100,110,220,240vac
this one is 220vac only, not that its models specific but interesting,.lol no its not! think i´ll go to bed now
this one is 220vac only, not that its models specific but interesting,.lol no its not! think i´ll go to bed now
Fredrik 1977
Super Member
Sooo! im back
the 11000 is in parts....well almost that is
i can confirm that the 9900 and 11000 uses the same caps list except for the maincaps
9900 uses 4x 6800uf 63V
11000 uses 4x 10000uf 63V
some initial pics of the 11000 driverboard (same as the one in the 9900 earlier in the thread)
F-2583 Driverboard
Protection/reg psu
i think its about time to replace the caps in this amp
everything looks stock except for C17 in the protection must have been replaced pretty recently to some computer psu samwha cap.
and C18 is a Nichicon UPW 3,3/100? schematic calls for a 10uf?
underside..
might aswell be a shot of the 9900
topside
the slightly bigger heatsinks sits all the way to the top of the chassis, about a 5mm clearence to the lid.
the 11000 is in parts....well almost that is
i can confirm that the 9900 and 11000 uses the same caps list except for the maincaps
9900 uses 4x 6800uf 63V
11000 uses 4x 10000uf 63V
some initial pics of the 11000 driverboard (same as the one in the 9900 earlier in the thread)
F-2583 Driverboard
Protection/reg psu
i think its about time to replace the caps in this amp
everything looks stock except for C17 in the protection must have been replaced pretty recently to some computer psu samwha cap.
and C18 is a Nichicon UPW 3,3/100? schematic calls for a 10uf?
underside..
might aswell be a shot of the 9900
topside
the slightly bigger heatsinks sits all the way to the top of the chassis, about a 5mm clearence to the lid.
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Driverboard
2 100/10 Bi-Polar
2 220/16
4 100/80
4 3,3/63
2 1/50
RIAA/PRE/tone
2 1,5/50 foil side riaa
4 10/50
6 1/50 BP
12? 3,3 BP ( i have written down 13?) strange i´ll look in to it. (i ordered 20)
Reg psu / protection (stick-in board)
2 220/80
4 100/50
1 100/16
2 10/50
1 330/6,3
1 220/10 BP
psu/protection relay
2 470/80
4 47/80
2 3,3/50
1 100/16
1 33/50
then there is a total of
6 2sa726
10 2sc1313
10 2sa798
4 DS-430 Diodes on driver board, replace with 1N4148
Can I take this list as definitive to order the components and try to make the racap of my AU9900? Thank you
2 100/10 Bi-Polar
2 220/16
4 100/80
4 3,3/63
2 1/50
RIAA/PRE/tone
2 1,5/50 foil side riaa
4 10/50
6 1/50 BP
12? 3,3 BP ( i have written down 13?) strange i´ll look in to it. (i ordered 20)
Reg psu / protection (stick-in board)
2 220/80
4 100/50
1 100/16
2 10/50
1 330/6,3
1 220/10 BP
psu/protection relay
2 470/80
4 47/80
2 3,3/50
1 100/16
1 33/50
then there is a total of
6 2sa726
10 2sc1313
10 2sa798
4 DS-430 Diodes on driver board, replace with 1N4148
Can I take this list as definitive to order the components and try to make the racap of my AU9900? Thank you
Fredrik 1977
Super Member
Hi!
I'll have to doublecheck it before i can promise that. Hold on.
Notice that the list is for amps using F-2583 driver board.
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Fredrik 1977
Super Member
well i think the list is correct. so order away oldsysop
Edited the list
Below is the updated and correct list
Main Caps
4pcs 6800/63(AU-9900) or 4pcs 10000/63 (AU-11000) with screw terminals. 52mm dia, max height is 80mm.
i will be replacing these with F&T 50x80mm screw terminal caps.
they are however a little bigger, 22000/63 lol
Driverboard F-2583
2 100/10 Bi-Polar
2 220/16
4 100/80
4 3,3/63
2 1/50
RIAA F-2570 /PRE/tone
2 1,5/50
4 10/50
6 1/50 BP
12 3,3/25 BP
Reg psu / protection (stick-in board) F-2568
2 220/80
4 100/50
1 100/16
3 10/50
1 330/6,3
1 220/10 BP
psu/protection relay F-2582
2 470/80
4 47/80
1 3,3/63
1 3,3/50
1 100/16
1 33/50
then there is a total of
6 2sa726 wich i replaced with BC327 if you do the same note that the BC327 has a CBE pin-out
10 2sc1313 wich i replaced with BC337 if you do the same note that the BC337 has a CBE pin-out
10 2sa798 wich i didnt replace....but i have heard they are somewhat failure prone.
4 DS-430 Diodes on driver board, replace with 1N4148
Edited the list
Below is the updated and correct list
Main Caps
4pcs 6800/63(AU-9900) or 4pcs 10000/63 (AU-11000) with screw terminals. 52mm dia, max height is 80mm.
i will be replacing these with F&T 50x80mm screw terminal caps.
they are however a little bigger, 22000/63 lol
Driverboard F-2583
2 100/10 Bi-Polar
2 220/16
4 100/80
4 3,3/63
2 1/50
RIAA F-2570 /PRE/tone
2 1,5/50
4 10/50
6 1/50 BP
12 3,3/25 BP
Reg psu / protection (stick-in board) F-2568
2 220/80
4 100/50
1 100/16
3 10/50
1 330/6,3
1 220/10 BP
psu/protection relay F-2582
2 470/80
4 47/80
1 3,3/63
1 3,3/50
1 100/16
1 33/50
then there is a total of
6 2sa726 wich i replaced with BC327 if you do the same note that the BC327 has a CBE pin-out
10 2sc1313 wich i replaced with BC337 if you do the same note that the BC337 has a CBE pin-out
10 2sa798 wich i didnt replace....but i have heard they are somewhat failure prone.
4 DS-430 Diodes on driver board, replace with 1N4148
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Fredrik 1977
Super Member
Cleaned and recaped F-2568 Regulator/protection board
2 caps on this board where actually broken. legs fell of as soon as i touch them
so this amp probably wouldnt have played on for very long without new caps.
2 caps on this board where actually broken. legs fell of as soon as i touch them
so this amp probably wouldnt have played on for very long without new caps.
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