I have some data on a 517 and 717 (I own a 717).
AU517 65W/ch into 8 ohms
Output rails are +/- 51V Used 12,000uf@63VDC rating
AU717 85W/ch into 8 ohms
Output rails are +/- 56V. Used 15,000uf@63VDC rating
AU919 was 100W/channel into 8 ohms.
http://www.sansui.us/toc.htm
http://www.sansui.us/images/Manuals/au919_spec.JPG
They would have likely scaled the rails and caps as they did
in the jump from the 517 to the 717 plus a few other enhancements like voltage regulation for some of the stages. The caps may have been increased to the next standard value (18,000uf).
63VDC rating would be marginal (in my opinion) at any rail
above 55V (although my 717 continues to function). This may
be mitigated if the VDC rating of the cap is at a high
temperature (say 85 degrees C). This is a calculated risk on the
part of a manufacturer to do this however (warranty issues).
A manual can be obtained from http://www.agtannenbaum.com/s_cat.html
for about $20.00 (ish)
AU517 65W/ch into 8 ohms
Output rails are +/- 51V Used 12,000uf@63VDC rating
AU717 85W/ch into 8 ohms
Output rails are +/- 56V. Used 15,000uf@63VDC rating
AU919 was 100W/channel into 8 ohms.
http://www.sansui.us/toc.htm
http://www.sansui.us/images/Manuals/au919_spec.JPG
They would have likely scaled the rails and caps as they did
in the jump from the 517 to the 717 plus a few other enhancements like voltage regulation for some of the stages. The caps may have been increased to the next standard value (18,000uf).
63VDC rating would be marginal (in my opinion) at any rail
above 55V (although my 717 continues to function). This may
be mitigated if the VDC rating of the cap is at a high
temperature (say 85 degrees C). This is a calculated risk on the
part of a manufacturer to do this however (warranty issues).
A manual can be obtained from http://www.agtannenbaum.com/s_cat.html
for about $20.00 (ish)
IS THERE
a chance that some of you know exactly the three trimers existing on au717 bords what exactly they do ???
one of them should be the offset voltage the other one will be idle and the third one ??? i dont know ....
also i wonder if anybody knows what was the original values
like how much idle ....... ok ofset as less is possible
and the third one ????
a chance that some of you know exactly the three trimers existing on au717 bords what exactly they do ???
one of them should be the offset voltage the other one will be idle and the third one ??? i dont know ....
also i wonder if anybody knows what was the original values
like how much idle ....... ok ofset as less is possible
and the third one ????
guys help please
i play with au 717 sansui.....
made everything in original condition rail voltage is 57+57 volts for out i used very original 2sa1302+2sc3281 ....
cleaned all very carefully
recaped the all amplifier boards.most of secondary power board
switches and everything is very clean pots also
but sound is kind of strange
bass section sounds like there is short of deep rush arround 60hz like bass is added ( almost a lot ) also if you press loudness then it really gets very a lot !!!!
but only in one frequency arround 60hz
resulting also that midle sounds like is too deep ( kind of far away )
and as about the high something like a hiss exists arround 4-5 khz .....
not really clean sound
any tips ?????
i play with au 717 sansui.....
made everything in original condition rail voltage is 57+57 volts for out i used very original 2sa1302+2sc3281 ....
cleaned all very carefully
recaped the all amplifier boards.most of secondary power board
switches and everything is very clean pots also
but sound is kind of strange
bass section sounds like there is short of deep rush arround 60hz like bass is added ( almost a lot ) also if you press loudness then it really gets very a lot !!!!
but only in one frequency arround 60hz
resulting also that midle sounds like is too deep ( kind of far away )
and as about the high something like a hiss exists arround 4-5 khz .....
not really clean sound
any tips ?????
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