Hi Lawrence,
Any Poly-Aluminum capacitor will work fine. They sound great compared to the tantalum capacitors I replace with them, and the measured distortion isn't affected either. I do generally use the highest voltage part I can get with a particular capacitance value, and maybe that's why I don't have problems.
-Chris
Any Poly-Aluminum capacitor will work fine. They sound great compared to the tantalum capacitors I replace with them, and the measured distortion isn't affected either. I do generally use the highest voltage part I can get with a particular capacitance value, and maybe that's why I don't have problems.
-Chris
Cause of Oscon jelmax produce Blackgate
FM better than FC for supply, but FC didnt bad either
(Depend on ALEXW88 - LM 3886, 10 years ago)
It is depend on you
FM better than FC for supply, but FC didnt bad either
(Depend on ALEXW88 - LM 3886, 10 years ago)
It is depend on you
You can combine some 16V Nichicon HZ if you want low, wet but really low.
http://www.hificollective.co.uk/sites/default/files/nichicon_hz_datasheet_0.pdf
"Products which are scheduled to be discontinued.
Not recommended for new designs"
http://www.hificollective.co.uk/sites/default/files/nichicon_hz_datasheet_0.pdf
"Products which are scheduled to be discontinued.
Not recommended for new designs"
Panasonic FR is very nice too. It goes up to 3300uF on 25uF, nice low ESR and nice ripple current.
BTW has anyone tried Nichicon UHW?
They go higher in capacity for each voltage than other low ESR caps, and seem to have higher ripple current too.
BTW has anyone tried Nichicon UHW?
They go higher in capacity for each voltage than other low ESR caps, and seem to have higher ripple current too.
Jelmax had its caps produced at Rubycon. Jelmax themselves did not produce anything. They invented and distributed the caps. Never understood why but Rubycon printed its brand name on the sleeve. One could not buy Black Gate capacitors at Rubycon though which only added to the confusion.
Special thing in these caps is the graphite impregnated paper which (apparently, according to Audio Note) is very hard to produce. When Rubycon decided to quit production the source of the graphite impregnated paper got forgotten somehow (or maybe that source stopped producing the paper ?!?). If you do destructive research you can also see shiny particles in the paper. It is said that this is Palladium but I can not confirm or deny that.
Special thing in these caps is the graphite impregnated paper which (apparently, according to Audio Note) is very hard to produce. When Rubycon decided to quit production the source of the graphite impregnated paper got forgotten somehow (or maybe that source stopped producing the paper ?!?). If you do destructive research you can also see shiny particles in the paper. It is said that this is Palladium but I can not confirm or deny that.
Last edited:
Electrolytic temperatures
Some advise please.
What determines the lifespan of an electrolytic capacitor having either 85 degrees or 105 degrees?
Is it true that a lower temperture (e.g. 85) capacitor should be used so as to last longer?
Some advise please.
What determines the lifespan of an electrolytic capacitor having either 85 degrees or 105 degrees?
Is it true that a lower temperture (e.g. 85) capacitor should be used so as to last longer?
A couple of things determine life of the caps.
a/ The operating or storage temperature.
b/ The AC ripple current (or intended current that flows in its intended circuit situation).
In other words a cap passing its maximum quoted ripple current at high operating temperature will have a far shorted life than one passing little AC current at the same temperature.
105C parts are pretty much universally preferred over 85C types.
A small drop in temperature can make a big difference to the lifespan, its not a linear relationship.
e.g 1000 hrs @ 85C could be 2000 hours @ 70C and 10,000 hours @ 65C.
a/ The operating or storage temperature.
b/ The AC ripple current (or intended current that flows in its intended circuit situation).
In other words a cap passing its maximum quoted ripple current at high operating temperature will have a far shorted life than one passing little AC current at the same temperature.
105C parts are pretty much universally preferred over 85C types.
A small drop in temperature can make a big difference to the lifespan, its not a linear relationship.
e.g 1000 hrs @ 85C could be 2000 hours @ 70C and 10,000 hours @ 65C.
low ripple current and low temperature massively increases lifetime.
But overvoltage spikes do use up the conductive surface of the foil.
The voltage rating of a capacitor is the working voltage you are allowed to use and the manufacturer guarantees performance at this voltage.
But if an interference spike arrives that takes the capacitor over it's surge rating, then there is very likely to be some damage in small localised "shorting" spots. This burning of the conducting foil removes some of the active surface.
Repeated spike overvoltage removes more of the foil.
Eventually you have no active foil left. This is very evident in the X2 & Y2 interference suppression capacitors removed from old mains filters.
But operate the capacitor at 50% of rated voltage and add on the interference spikes. Now many of the overvoltage spikes will not damage the foil because they are within the surge rating of the capacitor. The fewer spikes that do damage to the foil, allow the capacitor to last longer.
It not the running at 50%, or 100%, that determines the lifetime.
It's the millions of overvoltage interference spikes that exceed the surge rating that shortens the lifetime.
This Forum rarely mentions this spike interference vs lifetime effect.
But overvoltage spikes do use up the conductive surface of the foil.
The voltage rating of a capacitor is the working voltage you are allowed to use and the manufacturer guarantees performance at this voltage.
But if an interference spike arrives that takes the capacitor over it's surge rating, then there is very likely to be some damage in small localised "shorting" spots. This burning of the conducting foil removes some of the active surface.
Repeated spike overvoltage removes more of the foil.
Eventually you have no active foil left. This is very evident in the X2 & Y2 interference suppression capacitors removed from old mains filters.
But operate the capacitor at 50% of rated voltage and add on the interference spikes. Now many of the overvoltage spikes will not damage the foil because they are within the surge rating of the capacitor. The fewer spikes that do damage to the foil, allow the capacitor to last longer.
It not the running at 50%, or 100%, that determines the lifetime.
It's the millions of overvoltage interference spikes that exceed the surge rating that shortens the lifetime.
This Forum rarely mentions this spike interference vs lifetime effect.
Last edited:
Halo all,
Have anyone try:
1. Audio note kaisai series?
2. Clarity TC for power supply.
3. Jensen Axial (power supply or signal?)
Hope someone can give some feedback.
Thanks
Have anyone try:
1. Audio note kaisai series?
2. Clarity TC for power supply.
3. Jensen Axial (power supply or signal?)
Hope someone can give some feedback.
Thanks
Hi Chris,
Would you have measured how the high leakage current in aluminium polymer caps such as OSCON can effect the SQ and stability of the circuit you put them in? I was willing to try some aluminium polymers with values 10uf, 22uf and 330uf and hoping to get them at 25-35VDC. I was hoping that the 10uf and 22uf would improved the electrolytics st the 25-35V range in a circuit I have.
Peter
Nice, thanks for the info but i also buy those from win-source. They are cheap too and really high quality. You should consider looking up their store as well.
Hi Peter,
Leakage current reads as high dissipation using the LCR meter I have. I haven't tried to measure leakage yet. I do know that in the feedback circuit (to common, ground), it doesn't upset the balance of a diff pair. Again, I generally try to use the highest voltage parts in poly-Al I can find unless they are stupid money. I don't believe they are high in leakage at all. That is an opinion based on a bunch of observations, but no direct measurement.
-Chris
Leakage current reads as high dissipation using the LCR meter I have. I haven't tried to measure leakage yet. I do know that in the feedback circuit (to common, ground), it doesn't upset the balance of a diff pair. Again, I generally try to use the highest voltage parts in poly-Al I can find unless they are stupid money. I don't believe they are high in leakage at all. That is an opinion based on a bunch of observations, but no direct measurement.
-Chris
Hi rikeshj,
I just tried a number, DN2540N5 and it was about $2.26 (probably US), digikey has it for about 1.92 Canadian.
Hmmmmm
I just tried a number, DN2540N5 and it was about $2.26 (probably US), digikey has it for about 1.92 Canadian.
Hmmmmm
Elna capacitors are indeed known to provide better sound and considered to be the best choice on electrolytic capacitors for top end devices. However, there are different audio devices. Thus, in order to find the best, anyone would try to perform a listening comparison between famous series of electrolytic capacitors.
In my case these replaced Nichicon FG, previously my favourite for cathode bypassing. Similar type of sound, only better in all respects.
Never really liked any Elna cap. The black Cerafines were kinda okayish until i got to hear Mundorf Mlytics. The Silmics are just not for me. The "For Audio"...what a joke 🙂