Hello, I have a set of two different brands of capacitors to install in my Nikko alpha ii power amp and can't decide which are better to use.
When the amp was new, it came with 10,000uf 63V 85 degree ones that had been changed out to others before I got the amp.
The ones that were in it when I got it were Jamico 10,000uf 100V 85 degree units.
I am doing a total re-cap of the entire amp and figured I would replace the filter caps as well while I have it all apart.
I purchased a kit with all caps for the amp, and have no issues with any of them except the filter caps..... and reading all of the forums has got me a bit confused.
Have new caps from Mouser here or new caps that came with the kit.
The choices are: EKMH630VSN103MA50S Nippon United Chemi-Con 10,000uf 63v 105 degrees or Kemet ALC70A103EH100 10,000uf 100v 85 degrees.
I have read some bad things about the Kemets used as power supply filter caps, but not sure if it pertains to these particular ones. Specs are not too bad on either....
So hoping I can get some suggestions from those who know more about this than I do.
Thanks!!!
Russ
When the amp was new, it came with 10,000uf 63V 85 degree ones that had been changed out to others before I got the amp.
The ones that were in it when I got it were Jamico 10,000uf 100V 85 degree units.
I am doing a total re-cap of the entire amp and figured I would replace the filter caps as well while I have it all apart.
I purchased a kit with all caps for the amp, and have no issues with any of them except the filter caps..... and reading all of the forums has got me a bit confused.
Have new caps from Mouser here or new caps that came with the kit.
The choices are: EKMH630VSN103MA50S Nippon United Chemi-Con 10,000uf 63v 105 degrees or Kemet ALC70A103EH100 10,000uf 100v 85 degrees.
I have read some bad things about the Kemets used as power supply filter caps, but not sure if it pertains to these particular ones. Specs are not too bad on either....
So hoping I can get some suggestions from those who know more about this than I do.
Thanks!!!
Russ
Use the filters on Mouser and Digikey to find the largest capacitance that fits the physical space (diameter and height) on the pcb. Probably you'll find some 15000~18000uF in a size that fits (check the lead pitch), since cap density is much higher today than back when the amp was made. Prob not what you wanted to hear....
Either will work fine and while you can use larger, it really won't make a difference. 12K might be a consideration as sometimes they might be a little cheaper than the 10K ones. If you do decide to replace them, I would at least go with 105 degree rated ones - they'll last a lot longer, especially with the poor placement capacitors are usually given in commercial gear.
Hal
Hal
Electrolytic capacitors lifetime doubles for each 10°C reduction in temperature.
So the United Chemi-Con EKMH630VSN103MA50S 10,000uf 63v capacitor rated 2,000 hours life at 105°C would have a service life of 4,000 hours at 95°C and 8,000 hours at 85°C.
The Kemet ALC70A103EH100 10,000uf 100v capacitor rated 18,000 hours life at 85°C.
At ambient temperature of 65 degrees, the United Chemi-Con has estimated 32,000 hours lifetime and the Kemet has 72,000 hours lifetime.
https://chemi-con.com/capacitor-life/
So the United Chemi-Con EKMH630VSN103MA50S 10,000uf 63v capacitor rated 2,000 hours life at 105°C would have a service life of 4,000 hours at 95°C and 8,000 hours at 85°C.
The Kemet ALC70A103EH100 10,000uf 100v capacitor rated 18,000 hours life at 85°C.
At ambient temperature of 65 degrees, the United Chemi-Con has estimated 32,000 hours lifetime and the Kemet has 72,000 hours lifetime.
https://chemi-con.com/capacitor-life/
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