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Old 13th January 2004, 03:43 PM   #1
Cr3ator is offline Cr3ator  Netherlands
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Default matching of PSU caps usefull?

Dear Pass Labs fans,

A few days ago I received my Panasonic 47000uF / 50V caps for my Aleph 5 project.

Click the image to open in full size.

Now I'm wondering if it is useful to match them for each channel. The theory behind my question is that a difference in capacitance would result in a difference in rail-ripple voltage and thus an output distortion.

The PSU I plan to build will look like the picture below:

Click the image to open in full size.

Am I totally wrong here or would this really make a difference?

Thank you in advance,

Erik
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Old 13th January 2004, 04:51 PM   #2
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I wouldn't bother unless the ripple voltages on the
rails were really different.
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Old 13th January 2004, 09:42 PM   #3
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If you parallel enough pieces the variations in value will average out, anyway.

Grey
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Old 14th January 2004, 09:42 AM   #4
Cr3ator is offline Cr3ator  Netherlands
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First of all thats for your support. I'll see what happens when I connect them

Placing a lot of them in parallel is not an option (47.000uF remember?). But with a much smaller capacitance that would be an option.

Erik.

PS: I expect to publish my whole story and pics of my amp soon... Finaly after 1 year of thinking and searching for cheap components.
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Old 14th January 2004, 02:50 PM   #5
Jaac is offline Jaac  Netherlands
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Default Re: Thank you

Quote:
Originally posted by Cr3ator
First of all thats for your support. I'll see what happens when I connect them

Placing a lot of them in parallel is not an option (47.000uF remember?). But with a much smaller capacitance that would be an option.

Erik.

PS: I expect to publish my whole story and pics of my amp soon... Finaly after 1 year of thinking and searching for cheap components.
soon is a great word for me i think

gr Jaac
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Old 14th January 2004, 03:57 PM   #6
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Question: Could you tell where you bought these
Panasonic 47000uF / 50V

And also where to find these enclosures...

Alain.
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Old 18th January 2004, 03:35 PM   #7
Cr3ator is offline Cr3ator  Netherlands
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Quote:
Originally posted by Alain Dupont
Question: Could you tell where you bought these
Panasonic 47000uF / 50V

And also where to find these enclosures...

Alain.
I bought the caps at Farnell.
They cost about 32,00 each.

I obtained the enclosure on the picture for free at the University of Twente, where I study Electrical Engeneering. It contained some RCL filters for experiments. A lot of old devices are thrown away these days. You don't hear me complaining about it.
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