Flapper
Member
Hi all,
Recently I loaned my AU-2900 to a friend who returned it as dead. It turned out to be nothing more than the neutral lead had disconnected in the mains plug, but I'd opened up the case to have a look and it looks like a recap of the AU-2900 would be a pretty straightforward operation. One of the caps was noticeably leaking, although the sound doesn't seem to be noticeably affected.
I have recapped nothing more complex than some Celestion 33 speaker crossovers. I noticed a big difference in sound for these.
For the Sansui I think I'll just replace the main board caps at first.
I have a few questions that I'd appreciate advice on:
1) I don't want to spend huge amounts so will probably just replace electrolytics with electrolytics. I have used Alcaps in speaker crossovers, but I guess I need to fit unipolar replacements in the amp. Any cost-effective recommendations? ( I'm in the UK)
2) Are there any spots on the main board where it would be worth using polypropylene? Again - I don't want to spend loads!
3) Any benefit in upping the voltage on any of them or should I match as closely as possible?
Here's a list of the caps I can see on the main board for reference:
Elna 3300uf 35v - x2
? Light blue 220uf 35v - x2
? Light blue 100uf 35v - x2
Elna 33uf 50v - x2
Elna 47uf 50v - x2
Elna 47 or 4.7uf ?v - 1 (hard to see exactly)
? Light blue 47uf 6.3v - x2
? Light blue 1uf 50v - x2
? Orange 1uf 50v - x2
Thanks for any advice on the above and any stupid mistakes that I should avoid.
Sam
Recently I loaned my AU-2900 to a friend who returned it as dead. It turned out to be nothing more than the neutral lead had disconnected in the mains plug, but I'd opened up the case to have a look and it looks like a recap of the AU-2900 would be a pretty straightforward operation. One of the caps was noticeably leaking, although the sound doesn't seem to be noticeably affected.
I have recapped nothing more complex than some Celestion 33 speaker crossovers. I noticed a big difference in sound for these.
For the Sansui I think I'll just replace the main board caps at first.
I have a few questions that I'd appreciate advice on:
1) I don't want to spend huge amounts so will probably just replace electrolytics with electrolytics. I have used Alcaps in speaker crossovers, but I guess I need to fit unipolar replacements in the amp. Any cost-effective recommendations? ( I'm in the UK)
2) Are there any spots on the main board where it would be worth using polypropylene? Again - I don't want to spend loads!
3) Any benefit in upping the voltage on any of them or should I match as closely as possible?
Here's a list of the caps I can see on the main board for reference:
Elna 3300uf 35v - x2
? Light blue 220uf 35v - x2
? Light blue 100uf 35v - x2
Elna 33uf 50v - x2
Elna 47uf 50v - x2
Elna 47 or 4.7uf ?v - 1 (hard to see exactly)
? Light blue 47uf 6.3v - x2
? Light blue 1uf 50v - x2
? Orange 1uf 50v - x2
Thanks for any advice on the above and any stupid mistakes that I should avoid.
Sam