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Old 6th December 2009, 07:17 PM   #1
nad is offline nad  United Kingdom
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Default Which 15000uf 63v caps??

Howdy folks!

Anyone recommend a pair of 15000uf 63v main caps?

I have 10000uf 50v Mundorf Si's at the minute but they're showing 47v so there's not much headroom, hence the swap.

They must be reasonable in price as I'm not looking to spend more than 20 per cap.




Thanks
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Old 6th December 2009, 07:29 PM   #2
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No idea if this is the sort of thing you're looking for...
15000UF-63V CAPACITORS GOLD TUNE NICHICON on eBay (end time 16-Dec-09 10:45:24 GMT)
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Old 6th December 2009, 07:52 PM   #3
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Quote:
Originally Posted by nad View Post
They must be reasonable in price as I'm not looking to spend more than £20 per cap.
Thanks
Because this is one of the important device, I would not recommend to buy a low cost version. On the other hand there is no justify to pay a unnecessary amount of £'s for the typical slogan "special made for audio"
You can use without problem also the value "10000uF". The follow examples offers very good quality and reliability:
Evox-Rifa | Passives | Capacitors | Capacitors, Aluminium | Clamp-fixing - ALS30, B43564 85°C |PEH200MD5100M
BHC Components | Passives | Capacitors | Capacitors, Aluminium | Clamp-fixing - ALS30, B43564 85°C |ALS30A103DE063
Epcos | Passives | Capacitors | Capacitors, Aluminium | Clamp-fixing - ALS30, B43564 85°C |B41456B8109M

Last edited by tiefbassuebertr; 6th December 2009 at 07:56 PM.
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Old 6th December 2009, 08:18 PM   #4
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Thoroughly recommend any BHC 10000uf at 63v, put in my Rotel BX-870BX as a direct replacement (capacitance and voltage) and they worked a treat.

Got them from here
Aerovox BHC Electrolytic Capacitor 10000uF / 63V on eBay (end time 12-Dec-09 16:13:40 GMT) if you like eBaying (decent price, service and yes the parts did turn up!)
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Old 6th December 2009, 09:06 PM   #5
nad is offline nad  United Kingdom
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Forgot to mention they're snap-in and I'm limited to 55mm in height.

Just incase the first post is missed, I am currently using 10000uf 50v Mundorf M-Lytic Si's but they're showing 47v, so looking to increase the headroom.

I'm also looking for 15000uf as I assume I will get better dynamics and bass response than with the original spec 10000uf value?
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Old 6th December 2009, 09:06 PM   #6
Xoc1 is offline Xoc1  United Kingdom
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What do you think is wrong with using the existing capacitors at 47V rail voltages?
You are using them within specification.
BHC Specify a 65V surge rating for their ALS 50v capacitors.
So I would assume that your Mundorf caps would tolerate an occasional voltage spike.
Of course replacing them with new components will help, if they are old, or have been run at high temperatures. You will need to make sure that your new capacitors will fit in the existing space.
Audiocap
AudioCap.Net fom AudioCap Limited - The Audio Capacitor Supplier
Have a good selection of capacitors that would be suitable.
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Old 6th December 2009, 09:16 PM   #7
nad is offline nad  United Kingdom
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Quote:
Originally Posted by Xoc1 View Post
What do you think is wrong with using the existing capacitors at 47V rail voltages?
You are using them within specification.
BHC Specify a 65V surge rating for their ALS 50v capacitors.
So I would assume that your Mundorf caps would tolerate an occasional voltage spike.
Of course replacing them with new components will help, if they are old, or have been run at high temperatures. You will need to make sure that your new capacitors will fit in the existing space.
Audiocap
AudioCap.Net fom AudioCap Limited - The Audio Capacitor Supplier
Have a good selection of capacitors that would be suitable.
The Mundorfs are only a couple of months old. Do you not think I will get increased dynamics and bass with a 15000uf rather than a 10000uf?
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Old 6th December 2009, 09:22 PM   #8
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by nad View Post
Howdy folks!

but they're showing 47v so there's not much headroom, hence the swap.
Is that your supply that is 47Vdc ?

If so you should be ok with 50V caps
They are made to endure 50V safely, and may probably take a good deal more
I have even heard people claim caps to work better when working close to their limit
Too low voltage can make them become "dull"
So they say, but I dont know
Should I go buy new caps for 47Vdc, I would choose 63V too

I have decided to use BC caps from Schuro, Germany
The spec sheet seems gone, but last time I looked they were rated at 105degree and long life
Next option may be F&T from AudioCap.co.uk

Last edited by tinitus; 6th December 2009 at 09:26 PM.
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Old 6th December 2009, 10:21 PM   #9
mjf is offline mjf  Austria
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hello.
Passives | Capacitors | Capacitors, Aluminium 4294955331&selectAttribute=63V(dc)#breadCrumb
perhaps there are some parts.....................panasonic is a standard i have often used.
greets
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Old 6th December 2009, 10:30 PM   #10
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First off why not measure the line they're on to see if the Mundorfs are working on their limit or already overspecced. If they're right on their limit maybe consider uprating, if they've already got a good overhead stay at 47V.

Secondly, it's not just a cut and shut case that if you up the capacitance you'll suddenly hear an extra abundance of dynamics and bass. What if the 10000uF is already more than enough? Increasing the capacitance might not make one iota of difference in these terms.

Another thing to consider if the increase in peak in-rush currents at turn on due to the increased capacitance. Be aware of this!
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