DIY Powersupply for UCD

nilsomat · 14th November 2006, 07:48 AM

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

novec · 14th November 2006, 10:23 AM

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.

nilsomat · 14th November 2006, 11:05 AM

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

novec · 14th November 2006, 02:23 PM

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

gl · 14th November 2006, 02:54 PM

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

lucpes · 14th November 2006, 05:57 PM

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

nilsomat · 14th November 2006, 07:09 PM

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...

RX5 · 14th November 2006, 10:22 PM

schema/link for a DIY DC protection circuit perhaps?

nilsomat · 15th November 2006, 05:58 AM

@RX5: This would be very welcome! Thanks!

RX5 · 16th November 2006, 09:12 AM

Hi... what I meant was: anyone GOT ONE?

14th November 2006, 07:48 AM	#1
nilsomat diyAudio Member Join Date: Dec 2005 Location: Berlin	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

14th November 2006, 05:57 PM	#6
lucpes diyAudio Member Join Date: Dec 2003 Location: Iasi	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 __________________ Deep down inside.

14th November 2006, 10:22 PM	#8
RX5 diyAudio Member Join Date: Apr 2004 Location: TaC	schema/link for a DIY DC protection circuit perhaps? __________________ RoCk On!!! I love my diy UcD!!

16th November 2006, 09:12 AM	#10
RX5 diyAudio Member Join Date: Apr 2004 Location: TaC	Hi... what I meant was: anyone GOT ONE? __________________ RoCk On!!! I love my diy UcD!!

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14th November 2006, 10:23 AM	#2
novec diyAudio Member Join Date: Aug 2005	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.

14th November 2006, 11:05 AM	#3
nilsomat diyAudio Member Join Date: Dec 2005 Location: Berlin	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

14th November 2006, 02:23 PM	#4
novec diyAudio Member Join Date: Aug 2005	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

14th November 2006, 02:54 PM	#5
gl diyAudio Member Join Date: Dec 2003 Location: Sierra Foothills - California	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

15th November 2006, 05:58 AM	#9
nilsomat diyAudio Member Join Date: Dec 2005 Location: Berlin	@RX5: This would be very welcome! Thanks!

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