I would like to replace the two power caps in my Pioneer SA-7300 amp.
The corrent caps are 8000uf 50v.
I heard that good caps are Mundorf and Cerafine Elna but im open for suggestions.
I would like to know where can i get the recommended caps and their
average price if possible (i need international shipping).
Regards,
Roi.
The corrent caps are 8000uf 50v.
I heard that good caps are Mundorf and Cerafine Elna but im open for suggestions.
I would like to know where can i get the recommended caps and their
average price if possible (i need international shipping).
Regards,
Roi.
Well they might be labeled as "8000 uF". But electrolytic capacitors almost always have a very wide manufacturing tolerance. So they might have been quite different from 8000 uF, even when new. You might be able to find a possibly-standard 8200 uF labeled value at 50V or higher. But 10000 uF is much more common and should be close-enough.
I would be nice if you would enter the country you are in, in your profile. It would enable people to point you toward the most-appropriately-located sources of supply.
If it were me, I would probably just look at mouser.com or digikey.com and pick some low-ESR caps with high ripple-current ratings that had the proper values and voltage ratings. But I'm fairly certain that someone who specializes in hearing the differences between power supply capacitors will chime in with some opinions, any minute now.
Cheers,
Tom
I would be nice if you would enter the country you are in, in your profile. It would enable people to point you toward the most-appropriately-located sources of supply.
If it were me, I would probably just look at mouser.com or digikey.com and pick some low-ESR caps with high ripple-current ratings that had the proper values and voltage ratings. But I'm fairly certain that someone who specializes in hearing the differences between power supply capacitors will chime in with some opinions, any minute now.
Cheers,
Tom
I don't want to risk my amp with higher uf, i was told that it can burn the
bridge if i put caps with higher uf than the stock if i don't replace the bridge diods.
bridge if i put caps with higher uf than the stock if i don't replace the bridge diods.
As mentioned by gootee, tolerances are wide 🙂 on electrolytics, I have an older one on my desk here marked -10% + 50% and current production seems to be +/- 20%
the standard values are 6800 and 10000, you may find 8200uf but not common. The amp would have been designed for worst case tolerances at the time so I'd be happy to fit a high ripple/low esr 8200 or 10000uf cap as a replacement.
the standard values are 6800 and 10000, you may find 8200uf but not common. The amp would have been designed for worst case tolerances at the time so I'd be happy to fit a high ripple/low esr 8200 or 10000uf cap as a replacement.
I have stock on some Samwha 8200Uf 100V Snap-In caps
1 1/2 dia X 2" Tall http://www.apexjr.com/images/Samwha8200.jpg
there $3.00 Usd each
Also have 10,000Uf 50 Volt Nichicon Radial caps
1" dia X 2" Tall p/n UVR1H103MRD at $2.99ea
Steve @ Apex Jr.
1 1/2 dia X 2" Tall http://www.apexjr.com/images/Samwha8200.jpg
there $3.00 Usd each
Also have 10,000Uf 50 Volt Nichicon Radial caps
1" dia X 2" Tall p/n UVR1H103MRD at $2.99ea
Steve @ Apex Jr.
I checked my amp power caps and they have 4 legs, while the other caps i have seen has only two.
Another thing is that mine are 35mm diameter.
Which brands except mundorf are good for amps and what is considered a low
esr and what is considered high ripple? (i have no idea what those two things
mean, but i guess it's important).
Another thing is that mine are 35mm diameter.
Which brands except mundorf are good for amps and what is considered a low
esr and what is considered high ripple? (i have no idea what those two things
mean, but i guess it's important).
For PSU caps what is termed "Computer grade" have high ripple and low ESR. Ripple is to do with the current being taken and esr is the resistive loss. Someone with more knowledge then me will no doubt provide a technical explanation. For PSU caps a high ripple is usual.
like these computer grade cap
4 terminal is usually two terminals for the + & - and two other to help with fixing- usually not connected. the ones from apex are a 4 terminal type from the images
like these computer grade cap
4 terminal is usually two terminals for the + & - and two other to help with fixing- usually not connected. the ones from apex are a 4 terminal type from the images
Most of the caps i have seen in most websites doesn't write the ESR and ripple, so what can i do?
About the diameter, are the connections in the same position in all the caps or the cap diameter changes the distance between the connections?
Do i need computer grade or audio grade?
I decided to go with 10000uf, what brands and models are recommended?
I have never tested caps with my ear like most of you guys in this board,
so what is mostly preferred?
About the diameter, are the connections in the same position in all the caps or the cap diameter changes the distance between the connections?
Do i need computer grade or audio grade?
I decided to go with 10000uf, what brands and models are recommended?
I have never tested caps with my ear like most of you guys in this board,
so what is mostly preferred?
I just checked the distance between the connectors of each power cap and
it's 15mm.
I couldn't find caps with that connector spacing, please help!
it's 15mm.
I couldn't find caps with that connector spacing, please help!
I've had good luck with the high end Nichicon, Elna, or Nippon ones. Like someone else pointed out, mouser and digikey are great ways to look for them since they have very detailed advanced search functions that let you narrow down your choices by a lot of parameters, and both of them usually list ESR. If anything, look at similar caps' datasheets since the datasheets are usually for a series of caps-if you find one that you like but that is a little too small, you could probably find the part number for an alternate size that is otherwise identical on the sheet.
Thanks for the links, they really help!
Im looking over at mouser and i can't find 15mm leg spacing in the size of
cap i need, only very big ones have more than 12.5mm leg spacing.
Another thing, what is considered low ESR and what is considered high Ripple?
and do i have to buy caps that say that they are for audio or it doesn't matter as long as the quality and specs are similar?
Im looking over at mouser and i can't find 15mm leg spacing in the size of
cap i need, only very big ones have more than 12.5mm leg spacing.
Another thing, what is considered low ESR and what is considered high Ripple?
and do i have to buy caps that say that they are for audio or it doesn't matter as long as the quality and specs are similar?
Have a look at this data sheet, these are the most common 4 pin standards.
http://www.epcos.com/inf/20/30/db/aec_09/B43511__21.pdf
Any decent good quality make cap should do, unless you belive a cap in the DC supply path can influence sound, then you will have to look for a more exotic brand.
http://www.epcos.com/inf/20/30/db/aec_09/B43511__21.pdf
Any decent good quality make cap should do, unless you belive a cap in the DC supply path can influence sound, then you will have to look for a more exotic brand.
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