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Old 3rd September 2005, 02:11 AM   #1
Bryan is offline Bryan  United States
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Default High Voltage Power Supply Caps

Hey Guys,

I am going to rebuild my 845 monos, and would like to eliminate the electrolytics in the power supply. I need caps that can handle 1000-1200 VDC. I am familiar with the ASC oil-cans, but they do not seem to have the voltage/capacitances in need.

Jensen seems to have some high voltage metalized caps, but I question the availability of these products.

So, any suggestions?

Thanks,

Bryan
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Old 3rd September 2005, 02:22 AM   #2
Magura is offline Magura  Denmark
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How big caps do you need?

Magura
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Old 3rd September 2005, 02:36 AM   #3
Bryan is offline Bryan  United States
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Well, I am currently using a stack of electrolytics to give me 100uF at 1000V, so in the "ideal" world, I would want a 1000-1200 VDC/100uF cap.

Thoughts?

BK
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Old 3rd September 2005, 02:41 AM   #4
Magura is offline Magura  Denmark
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I have a couple of PP in nitrogen caps you may find interesting.

http://www.briangt.com/gallery/magura/PICT0001

Those are 167uF 630V, so 2 of those in series should do the trick.

I also have a few PP in oil caps of 55uF and 167uF 630V laying around.

Magura
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Old 3rd September 2005, 02:46 AM   #5
Bryan is offline Bryan  United States
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Nice looking caps... Where did youu source them, and what are they worth to you?

Do you only have the two, as I ultimately need the equivalent of 2 X 1000-1200VDC/100uF caps, one for each channel.
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Old 3rd September 2005, 02:52 AM   #6
Magura is offline Magura  Denmark
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I have a handfull of each.

They have been saved for me and my closest friends projects, unfortunately my wife is of a different opinion, so now I have downgraded the demands to selling them to somebody whom will actually use them, as I don't want to see them end up in somebody's pile of collected parts he "just could not live without".

I bought them from an old friend of mine whom ultimately had the same issue with his wife.

Magura
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Old 3rd September 2005, 03:09 AM   #7
Bryan is offline Bryan  United States
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Firstly, is the wife tired of the projects in general, or just projects of such high voltage/consequence, and secondly, what do you want for the caps?

I'm fortunate the my girlfriendf is quite understanding of my hobbies, and lets me fiddle as I feel necessary. She doesnt understand it, but likes that they make me happy.

This is not to say I can ignore her. She is a firey italian woman, and lets me know when she needs attention!!!

I've dodged a few flying plates, and thus have learned my lessons...

Anyway.... back to caps.

Are they super expensive? My 845 monos would make a good home, no?
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Old 3rd September 2005, 03:20 AM   #8
Magura is offline Magura  Denmark
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Quote:
Originally posted by Bryan
Firstly, is the wife tired of the projects in general, or just projects of such high voltage/consequence?

Naah, she even participates in building amps. She just don't like the amount of heatsinks, resistors and caps in the livingroom, to be honest I kinda understand her, it have been getting a little out of hand within the last year or so.

Magura
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Old 3rd September 2005, 04:06 AM   #9
amperex is offline amperex  United States
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AC motor run caps are rated at least 1.4 x AC rated voltage. 450 VAC = 630 volts DC or 370 VAC = 518 volts DC. Use two caps in series.
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Old 3rd September 2005, 04:26 AM   #10
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Quote:
I'm fortunate the my girlfriendf is quite understanding of my hobbies, and lets me fiddle as I feel necessary
Review this after you get married !
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