capasitor

arold19 · 21st January 2003, 07:08 PM

Ok, I need information!

Today, I buy 8 capasitor SANGAMD type CDM 6700uF 75VDC

The probleme is: When I put 9 vol in, it diseaper in a second! Even if a put 4 of them in parallel.

It a compare to only one 15600 uF 50VDC who can keep the 9 volt during minute ou hours...

It is possible that this i not electronytic capasitor? Or they are dead!

Do you advise to put this capasitor in the power supply of my Zen V4 ???

What is the problem???

ThingyNess · 21st January 2003, 07:32 PM

It's likely that the capacitors are very old, and their leakage currents are very high.

Leave a voltage between 40 and 70VDC connected to them in series with a 1k, 10W (or any value around there) resistor to limit the current they draw. Leave them like this for a few hours. Hopefully they'll slowly get better and reduce their leakage current to an acceptable (but still over-spec) value.

arold19 · 21st January 2003, 07:38 PM

Is is very boring... I buy it and they are old....
I will return it at the store... thank you very much for the information!!!

arold19 · 31st January 2003, 02:27 AM

I try to get some good capasitor put I am unable to find! Somebody know where a can buy lange can aluminium capacitor!
I saw on the net ELNA capacitor, aluminium lectrolytic capacitors for audio! somebody know them... ???

coffin · 31st January 2003, 05:04 AM

Elna for audio is good.
You can also find following brand:
EPCOS( ex Siemens) Sikorel series
RIFA (Evox) PEH169 series
BC component ( ex Philips) screw-in type
UCC screw-in type 36D or 36DX

arold19 · 31st January 2003, 06:36 PM

Yes but do you know how I can get this capacitor???

Mark A. Gulbrandsen · 31st January 2003, 06:42 PM

Arold,
Call Ra-Elco In Salt Lake City. They have new in the box surplus Chem-Con 65,000mfd @63 volts can for 10.00 U,S, each.....they include the mounting foot too and hardware with each one!!
Hard to beat that deal. Call 801-467-7749 Ask for Brian or Robert.
Mark

arold19 · 3rd February 2003, 07:00 PM

Ok! I have the chance to buy audio capacitor from Jensen, a compagny from Danmark! This is capacitor for the audio application! They are MORE expensive than other capacitor, but I want to know if it is realy better to buy this kind of capacitor for my Ven V4 ???
Also, do 63V capacitor is enought for a 50V rail ???

thank you!!!

tiroth · 3rd February 2003, 07:13 PM

What are the dimensions on those caps Mark?

arold19 · 3rd February 2003, 07:27 PM

For the:

15 000 uF 63V 35mm*70mm
10 000 uF 63V 35mm*50mm
6 800 uF 100v 35mm*70mm

why???

21st January 2003, 07:08 PM	#1
arold19 diyAudio Member Join Date: Nov 2002 Location: montreal	capasitor Ok, I need information! Today, I buy 8 capasitor SANGAMD type CDM 6700uF 75VDC The probleme is: When I put 9 vol in, it diseaper in a second! Even if a put 4 of them in parallel. It a compare to only one 15600 uF 50VDC who can keep the 9 volt during minute ou hours... It is possible that this i not electronytic capasitor? Or they are dead! Do you advise to put this capasitor in the power supply of my Zen V4 ??? What is the problem???

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21st January 2003, 07:32 PM	#2
ThingyNess diyAudio Member Join Date: Feb 2002 Location: Vancouver, BC, Canada	It's likely that the capacitors are very old, and their leakage currents are very high. Leave a voltage between 40 and 70VDC connected to them in series with a 1k, 10W (or any value around there) resistor to limit the current they draw. Leave them like this for a few hours. Hopefully they'll slowly get better and reduce their leakage current to an acceptable (but still over-spec) value.

21st January 2003, 07:38 PM	#3
arold19 diyAudio Member Join Date: Nov 2002 Location: montreal	Is is very boring... I buy it and they are old.... I will return it at the store... thank you very much for the information!!!

31st January 2003, 02:27 AM	#4
arold19 diyAudio Member Join Date: Nov 2002 Location: montreal	I try to get some good capasitor put I am unable to find! Somebody know where a can buy lange can aluminium capacitor! I saw on the net ELNA capacitor, aluminium lectrolytic capacitors for audio! somebody know them... ???

31st January 2003, 05:04 AM	#5
coffin diyAudio Member Join Date: Oct 2002 Location: Taiwan	Elna for audio is good. You can also find following brand: EPCOS( ex Siemens) Sikorel series RIFA (Evox) PEH169 series BC component ( ex Philips) screw-in type UCC screw-in type 36D or 36DX

31st January 2003, 06:36 PM	#6
arold19 diyAudio Member Join Date: Nov 2002 Location: montreal	Yes but do you know how I can get this capacitor???

3rd February 2003, 07:00 PM	#8
arold19 diyAudio Member Join Date: Nov 2002 Location: montreal	Ok! I have the chance to buy audio capacitor from Jensen, a compagny from Danmark! This is capacitor for the audio application! They are MORE expensive than other capacitor, but I want to know if it is realy better to buy this kind of capacitor for my Ven V4 ??? Also, do 63V capacitor is enought for a 50V rail ??? thank you!!!

3rd February 2003, 07:13 PM	#9
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	What are the dimensions on those caps Mark?

3rd February 2003, 07:27 PM	#10
arold19 diyAudio Member Join Date: Nov 2002 Location: montreal	For the: 15 000 uF 63V 35mm70mm 10 000 uF 63V 35mm50mm 6 800 uF 100v 35mm*70mm why???

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