SA-9100 capacitor parts list
- Thread starter jckonicek
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I looked, nope...
But there's Four 63v caps (two on each p.s. board 470/63 & 100/63) that would benefit from being 80v. $ difference is small.
The rest of the caps on the B board could all be spec'd at 50v, for survival under fault conditions. If they're ALREADY at 50, and there is a corresponding value at 63v I would use it, but I wouldn't go to 80v.
Just my $0.02 worth.. be careful about axial vs radial leads....
But there's Four 63v caps (two on each p.s. board 470/63 & 100/63) that would benefit from being 80v. $ difference is small.
The rest of the caps on the B board could all be spec'd at 50v, for survival under fault conditions. If they're ALREADY at 50, and there is a corresponding value at 63v I would use it, but I wouldn't go to 80v.
Just my $0.02 worth.. be careful about axial vs radial leads....
50V caps ok to replace 25V?
Hi, here's the cap list. I also replaced the two axial electrolytics on the PS board. For the hell of it, and so I could hopefully just fix it and forget about it for the next 25 years, I also ordered the big filter caps. They were about $17 a piece and I'd rather just get it over with. Also the girlfriend it pretty much over me tinkering and is ready to just start enjoying. I also replaced the input differential pairs per Echowar's advice and noticed a nice change in sound. Hope this helps. I'm pretty sure it's complete but it wouldn't be a bad idea to check against your manual.
As a side note, all digikey had was 50V version of the .22 and .47 electrolytics for the amp board. I haven't replaced them yet because I wanted to see what the experts thought, what do you guys think, is this ok to sub the higher value cap? :scratch2:
Quantity Part Number Description Unit Price
AMP Board AWH-023B
2 493-1330-ND CAP 0.22UF 50V ELECT VZ RADIAL 0.2 $0.40 Manual lists 25V
2 493-1332-ND CAP 0.47UF 50V ELECT VZ RADIAL 0.2 $0.40 Manual lists 25V
4 493-1038-ND CAP 33UF 16V ELECT VR RADIAL 0.11 $0.44
2 493-1253-ND CAP 470UF 6.3V ELECT VZ RADIAL 0.26 $0.52
2 493-1253-ND CAP 470UF 6.3V ELECT VZ RADIAL 0.26 $0.52
Protection Circuit AWM-025-A
2 493-1252-ND CAP 330UF 6.3V ELECT VZ RADIAL 0.25 $0.50
1 493-1296-ND CAP 4.7UF 25V ELECT VZ RADIAL 0.2 $0.20
1 493-1283-ND CAP 100UF 16V ELECT VZ RADIAL 0.14 $0.14
10 PCF1493CT-ND CAP .22UF 100V PPS FILM 2825 5% 1.715 $17.15 Manual lists .056uf
Power Supply Circuit
2 493-1355-ND CAP 100UF 63V ELECT VZ RADIAL 0.36 $0.72
1 493-1036-ND CAP 10UF 16V ELECT VR RADIAL 0.11 $0.11
4 493-1337-ND CAP 10UF 50V ELECT VZ RADIAL 0.13 $0.52
1 493-1314-ND CAP 10UF 35V ELECT VZ RADIAL 0.17 $0.17
Hi, here's the cap list. I also replaced the two axial electrolytics on the PS board. For the hell of it, and so I could hopefully just fix it and forget about it for the next 25 years, I also ordered the big filter caps. They were about $17 a piece and I'd rather just get it over with. Also the girlfriend it pretty much over me tinkering and is ready to just start enjoying. I also replaced the input differential pairs per Echowar's advice and noticed a nice change in sound. Hope this helps. I'm pretty sure it's complete but it wouldn't be a bad idea to check against your manual.
As a side note, all digikey had was 50V version of the .22 and .47 electrolytics for the amp board. I haven't replaced them yet because I wanted to see what the experts thought, what do you guys think, is this ok to sub the higher value cap? :scratch2:
Quantity Part Number Description Unit Price
AMP Board AWH-023B
2 493-1330-ND CAP 0.22UF 50V ELECT VZ RADIAL 0.2 $0.40 Manual lists 25V
2 493-1332-ND CAP 0.47UF 50V ELECT VZ RADIAL 0.2 $0.40 Manual lists 25V
4 493-1038-ND CAP 33UF 16V ELECT VR RADIAL 0.11 $0.44
2 493-1253-ND CAP 470UF 6.3V ELECT VZ RADIAL 0.26 $0.52
2 493-1253-ND CAP 470UF 6.3V ELECT VZ RADIAL 0.26 $0.52
Protection Circuit AWM-025-A
2 493-1252-ND CAP 330UF 6.3V ELECT VZ RADIAL 0.25 $0.50
1 493-1296-ND CAP 4.7UF 25V ELECT VZ RADIAL 0.2 $0.20
1 493-1283-ND CAP 100UF 16V ELECT VZ RADIAL 0.14 $0.14
10 PCF1493CT-ND CAP .22UF 100V PPS FILM 2825 5% 1.715 $17.15 Manual lists .056uf
Power Supply Circuit
2 493-1355-ND CAP 100UF 63V ELECT VZ RADIAL 0.36 $0.72
1 493-1036-ND CAP 10UF 16V ELECT VR RADIAL 0.11 $0.11
4 493-1337-ND CAP 10UF 50V ELECT VZ RADIAL 0.13 $0.52
1 493-1314-ND CAP 10UF 35V ELECT VZ RADIAL 0.17 $0.17
The higher voltage(s) are fine, just don't go overboard (but your wallet will warn you about the overboard part).
25v to 50v is harmless.
25v to 50v is harmless.
The schematic shows 56 volts at those caps, but I have seen it higher. Then there's the junk that is coming in over the line and makes it through the transformer. Seven volts are not a lot of safety margin while the 80v caps aren't stressed at all with 24v margin.
But when you up the voltage to 80v with only a few cents cost to do so, it's cheap insurance.
On the other side of the regulator, the increased voltages are in case the regulator fails. There's less to replace, just blown transistors, not shorted caps (from overvoltage) too. If you wanted to get really anal, all caps could be 63v caps, but with the 15% momentary overvoltage 50v is a reasonable gamble.
