Where can i find 8000uf 50v caps?

rg12 · 10th August 2010, 03:17 AM

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.

gootee · 10th August 2010, 03:58 AM

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

rg12 · 10th August 2010, 02:22 PM

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.

Spiny · 10th August 2010, 05:12 PM

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.

Apex Jr · 10th August 2010, 06:14 PM

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.

rg12 · 10th August 2010, 07:04 PM

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).

Spiny · 10th August 2010, 08:37 PM

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

rg12 · 10th August 2010, 10:21 PM

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?

rg12 · 11th August 2010, 12:58 AM

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!

thebulbguy · 11th August 2010, 02:19 AM

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.

10th August 2010, 03:17 AM	#1
rg12 diyAudio Member Join Date: Aug 2010	Where can i find 8000uf 50v caps? 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.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
8000uF MKP Caps for Krell MRA = Master Reference Amplifier - Schematic wanted	tiefbassuebertr	Solid State	11	8th June 2011 12:14 PM
Looking to replace 6800uF 50V filter caps	FickleBJT	Solid State	6	7th March 2010 06:56 PM
Sprague Caps 16000uF/50V	WALTER BURKHARD	Swap Meet	1	25th February 2005 05:42 AM
35,000u/50V Mallory caps	Peter Daniel	Swap Meet	2	7th March 2003 12:37 PM
4,700/50v ROE caps	Peter Daniel	Swap Meet	0	7th February 2003 05:50 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

10th August 2010, 03:58 AM	#2
gootee diyAudio Member Join Date: Nov 2006 Location: Indiana Blog Entries: 1	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

10th August 2010, 02:22 PM	#3
rg12 diyAudio Member Join Date: Aug 2010	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.

10th August 2010, 05:12 PM	#4
Spiny diyAudio Member Join Date: Feb 2008	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.

10th August 2010, 06:14 PM	#5
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	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.

10th August 2010, 07:04 PM	#6
rg12 diyAudio Member Join Date: Aug 2010	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).

10th August 2010, 08:37 PM	#7
Spiny diyAudio Member Join Date: Feb 2008	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

10th August 2010, 10:21 PM	#8
rg12 diyAudio Member Join Date: Aug 2010	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?

11th August 2010, 12:58 AM	#9
rg12 diyAudio Member Join Date: Aug 2010	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!

11th August 2010, 02:19 AM	#10
thebulbguy diyAudio Member Join Date: Jul 2010 Location: VB	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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)