I just won this auction:
The seller says that this AU alpha 707DR is 100% new and never used and that he opened the original box just to take pictues.
This amp was manufactured around 1990-92.
So it is some 16-18 years old.
What can I expect when I turn it on after all this time?
Could its caps be all dried out?
I did a total recap on my vintage Kenwood KA-907 from 1979.
But if this Sansui is new and never used, it woud be a shame to rip all those fancy caps out (I heard that Sansui used only highest quality parts in those models) in order to replace them with new ones.
On the other hand, they might just look pretty on the outside, while being all dried out inside.
Does anybody have a service manual for this beast?
...Or knows how and where to check an set bias and how to adjust DC offset?! What are the original bias values?
Thanks in advance!