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???
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???
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.
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.
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!!!
I will return it at the store... thank you very much for the information!!!
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... ???
I saw on the net ELNA capacitor, aluminium lectrolytic capacitors for audio! somebody know them... ???
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
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
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!!!
Also, do 63V capacitor is enought for a 50V rail ???
thank you!!!
tiroth,
They are 3" in diameter by 3.75 inches high give or take a foot or two.......as measure with my Stanley Tape measure inside the amp. I usually prefer calipers but they are at work.
arold19
A 63 volt cap will work fine on 50 volt rails....Caps have a = and _ rating on voltage and capacitance. Varies with manufacturer, or if its rainy or sunny out.
Mark
They are 3" in diameter by 3.75 inches high give or take a foot or two.......as measure with my Stanley Tape measure inside the amp. I usually prefer calipers but they are at work.
arold19
A 63 volt cap will work fine on 50 volt rails....Caps have a = and _ rating on voltage and capacitance. Varies with manufacturer, or if its rainy or sunny out.
Mark
Everybody talk about good sound quality and quality of the composent, but do the quality of the capacitor in the power supply is important ???
""The reputation of the electrolytic capacitors is not flattering.
They are accused to be the worst component causing distortions in any circuit of a highend audio network. It doesn't matter if the good old electrolytic capacitor is sitting as a quick power source in the power supply or as a coupling capacitor in the pre- or power amplifier or in the crossover filter of a speaker system, they just destroy the whole thing.
They have a high dielectric absorption causing serious phase(frequency) delays. Signals going through electrolytics are slowed down and suffer severe harmonic distortion.
They have high impedance and ESL value at higher frequencies and their resonance frequency is too low to be used in a wide band amplifier. Most of the accusations are true, but then everybody knows that the electrolytics are indispensable because of their unbeatable C/V ratio. It is necessary and possible to improve the worst drawbacks of the electrolytics.""
""The reputation of the electrolytic capacitors is not flattering.
They are accused to be the worst component causing distortions in any circuit of a highend audio network. It doesn't matter if the good old electrolytic capacitor is sitting as a quick power source in the power supply or as a coupling capacitor in the pre- or power amplifier or in the crossover filter of a speaker system, they just destroy the whole thing.
They have a high dielectric absorption causing serious phase(frequency) delays. Signals going through electrolytics are slowed down and suffer severe harmonic distortion.
They have high impedance and ESL value at higher frequencies and their resonance frequency is too low to be used in a wide band amplifier. Most of the accusations are true, but then everybody knows that the electrolytics are indispensable because of their unbeatable C/V ratio. It is necessary and possible to improve the worst drawbacks of the electrolytics.""
For the ZEN V4:
do you think that only one very good four pole 15 000uF capacitor for the audio application by channel will be enought ?????
do you think that only one very good four pole 15 000uF capacitor for the audio application by channel will be enought ?????
You can go with the best parts in all locations. But this is not my approach. It may be important to recognize bottleneck in your system. It is about a location where a cheap upgrade will improve the system a lot. But it takes experience (and some knowledge) to be good at this. I think Jensen (sorry) is too expensive for the power supply (even if I don’t know your situation). This is the location where the law of diminishing returns commonly applies.
For PS, I will use more capacitance with standard grade caps (like the one Mark show you) than expensive caps with less capacitance. 4 x 15000uF will surely be enough. But, don’t you use the regulator as in Zen3? If you do, you don’t need a lot capacitance. I use similar MOSFET regulator with only 3300uF, and the output was cleaner than the pi filter. What brand do you use for the input cap? I found that good MKP (WIMA MKP 10 is my standard) is suitable for any audio signal path, and I would pay more only for oil caps.
Just be careful if you buy second hand or old caps. I prefer AT LEAST 63V, in case I need them for other projects. I myself will prefer to upgrade my speaker than be over-budget on the caps brand for the PS. For the tweeter line in the crossover, using expensive oil capacitor will make sense, even for an expensive ready-built speaker.
For PS, I will use more capacitance with standard grade caps (like the one Mark show you) than expensive caps with less capacitance. 4 x 15000uF will surely be enough. But, don’t you use the regulator as in Zen3? If you do, you don’t need a lot capacitance. I use similar MOSFET regulator with only 3300uF, and the output was cleaner than the pi filter. What brand do you use for the input cap? I found that good MKP (WIMA MKP 10 is my standard) is suitable for any audio signal path, and I would pay more only for oil caps.
Just be careful if you buy second hand or old caps. I prefer AT LEAST 63V, in case I need them for other projects. I myself will prefer to upgrade my speaker than be over-budget on the caps brand for the PS. For the tweeter line in the crossover, using expensive oil capacitor will make sense, even for an expensive ready-built speaker.
I don't understand!
You say that it is better to use more capacitance than then expensive caps woth less capacitance. Like 4 * 15 000uF
After, you say that 3 300uF is enough if I use the regulator......
My shema is the same than pass labs, I use the zener regulator....
Can I have some explication please ??
Thank you 1!!!
You say that it is better to use more capacitance than then expensive caps woth less capacitance. Like 4 * 15 000uF
After, you say that 3 300uF is enough if I use the regulator......
My shema is the same than pass labs, I use the zener regulator....
Can I have some explication please ??
Thank you 1!!!
With certain amount of money I will have the option to buy hi grade caps with the total of X capacitance. With standard grade caps, I will get more than X (it’s about 5 times, comparing a Nippon Chemi-Con with a certain type of ELNA in one store I know). I will surely not go with Rubycon Black Gate for the PS.
Mr. Pass seemed to know exactly the importance of the capacitance in his design. I will go with the same approach but until I fix the bottlenecks in my system chain.
I just confirmed the zen4 documentation, and it shows 25000uF (per channel, which in my opinion is more than necessary) in the unregulated PS. For the old version (the pi filter), more capacitance is required. I don’t know how much, but it must be a lot in order to have equivalent filtering (For regular amplifiers, the hi power transformer and the caps are more for the bass performance).
Mr. Pass seemed to know exactly the importance of the capacitance in his design. I will go with the same approach but until I fix the bottlenecks in my system chain.
I just confirmed the zen4 documentation, and it shows 25000uF (per channel, which in my opinion is more than necessary) in the unregulated PS. For the old version (the pi filter), more capacitance is required. I don’t know how much, but it must be a lot in order to have equivalent filtering (For regular amplifiers, the hi power transformer and the caps are more for the bass performance).
I understand that the voltage regulator of Zen V4 works as wanted if two conditions are satisfied with: (1) Vd (50V) fluctuates not down to less than 46V, i.e. peak-to-peak ripple voltage out of the capacitor filter is not greater than 4V and (2) the filter capacitor is capable to supply more than 2A. Then, the filter capacitor which is greater than 4700uF is deemed acceptable. This is assuming the AC power is stable from the wall. But, The AC power might be actually instable. If so, I would reduce the acceptable peak-to-peak ripple voltage out of the cap down to about 1V, and accordingly the cap size is to be of about 20,000uF. Maybe 25,000uF as recommended by Nelson Pass.
I believe normal electrolytic cap will do the job.
JH
I believe normal electrolytic cap will do the job.
JH
I think, down to 46V means 8V peak-to-peak? I mean I don't know much about electronics "jargons".🙄
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