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Old 14th November 2006, 07:48 AM   #1
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Default DIY Powersupply for UCD

Hello everyone,

has anyone designed a powersupply which is capable of powering 3xUCD180 and has also the DC-protection, and perhaps an auxiliary +/-12VDC supply onboard? So it should be really designed to power UCDs and offer all of the benefits of the Hypex PS modules, except it is really DIY.
Probably you will ask why i am not just going to buy a Hypex supply now, well first i want my amp to be a little more DIY than just buying everything, also i want a bit more flexibility in choosing components (diodes, caps), and i really don't see myself buying slit-foil capacitors.
So, any ideas/ help would be appreciated, most likely it has been done by someone else before anyways and someone is willing to share....
Regards,
Nils
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Old 14th November 2006, 10:23 AM   #2
novec is offline novec  Norway
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You're right, someone's definately done it before Actually, there's a whole forum dedicated to power supply design, under "Other stuff". You should find more than enough to keep you busy there.
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Old 14th November 2006, 11:05 AM   #3
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I have been looking around there, also i found this thread:

Optimal supply design for UCD and Zappulse modules

A lot of different (and good) ideas, but somehow it felt it was not really going anywhere beyond. Also was missing information on the protection circuit...
Regards,
Nils
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Old 14th November 2006, 02:23 PM   #4
novec is offline novec  Norway
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You've got a point there. Personally, I went for a dual mono setup with a 1300 VA 42V trafo per channel, and dual bridges from the NCD power supply, but with 22 nF caps over each diode and across each AC secondary. I'm running two amps per channel, with active crossover, and have a single 15000 uF Jensen 4-pole on the high amp and dual Jensens on the bass amp. My soft start circuit is from LC Audio. Expensive overkill, but it should sound good
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Old 14th November 2006, 02:54 PM   #5
gl is offline gl  United States
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Google for "Elliot Sound Products". Rod has a wonderful web site that contains all the pieces to create what you need - especially the soft start.

Graeme
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Old 14th November 2006, 05:57 PM   #6
lucpes is offline lucpes  Europe
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I wouldn't add dc protection, as I've been running Ucd's for like 2 years now and no problem, even when one rail got disconnected due to a bad solder joint so the amplifiers were on the + rail only.

Simple soft-start circuit: http://mitglied.lycos.de/Promitheus/...or_toroids.htm
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Old 14th November 2006, 07:09 PM   #7
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Quote:
Originally posted by lucpes
I wouldn't add dc protection, as I've been running Ucd's for like 2 years now and no problem, even when one rail got disconnected due to a bad solder joint so the amplifiers were on the + rail only.
I think i play it safe and add DC protection rather than killing my lovely speakers...
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Old 14th November 2006, 10:22 PM   #8
RX5 is offline RX5  Philippines
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schema/link for a DIY DC protection circuit perhaps?
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Old 15th November 2006, 05:58 AM   #9
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@RX5: This would be very welcome! Thanks!
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Old 16th November 2006, 09:12 AM   #10
RX5 is offline RX5  Philippines
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Hi... what I meant was: anyone GOT ONE?
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