problem with hypes ucd400 and Smps400

Phil Olson · 26th October 2009, 10:55 PM

Anyone tried a hypex UCD400 amp with a hypex SMPS400 power supply? The supplty alone outputs the right voltage but when I hook up the UCD400, the supply jumps to only 12V, then resets back to zero after 75ms. This cycles every 1.75 seconds.

I've only hooked up the +70V, GND, and -70V.

I've emailed customer service there but thoght if it's something simple I've done, I could get a quicker answer here. What am I missing?

Thanks,
Phil

Phil Olson · 26th October 2009, 11:59 PM

Never mind! I found my problem and am way to embarrassed to admit what I did!

Session · 11th January 2010, 03:09 PM

Well, that is not very educational. Could you please explain were you went wrong? I am waiting on one of there puppies myself.

Phil Olson · 04:16 PM

I'm embarrassed damn it!

OK, I'll fess up and blame it on old age.

I hooked up the power to LS+ and LS- and hooked up the speaker to + and -.

The really embarrasing part is I am a retired electrical engineer with half a dozen patents!

Just to be perfectly clear LS stands for Loud Speaker, not power!

There, happy?

P.S. After I corrected the wiring, it all worked fine with no apparent harm to either the speaker or the amp or the power supply.

Session · 11th January 2010, 07:06 PM

Everyone can have a bad day right?

Anyways, glad it worked out allright for you.

Tarzan · 12th January 2010, 06:25 AM

Hey Phil,
It can happen but now we are sure of the rugidness of the Hypex modules.
Cheers,
Tarzan

Ltralus · 12th January 2010, 07:08 AM

We knew that already. What was tested here I think was the SMPS's overcurrent protection, looks like it worked. The module would have completely fried without it, or blown the rail fuses that probably wouldn't have been installed, or likely fried them both along with the module had they been.

26th October 2009, 10:55 PM	#1
Phil Olson diyAudio Member Join Date: May 2006	problem with hypes ucd400 and Smps400 Anyone tried a hypex UCD400 amp with a hypex SMPS400 power supply? The supplty alone outputs the right voltage but when I hook up the UCD400, the supply jumps to only 12V, then resets back to zero after 75ms. This cycles every 1.75 seconds. I've only hooked up the +70V, GND, and -70V. I've emailed customer service there but thoght if it's something simple I've done, I could get a quicker answer here. What am I missing? Thanks, Phil

11th January 2010, 04:15 PM	#4
Phil Olson diyAudio Member Join Date: May 2006	I'm embarrassed damn it! OK, I'll fess up and blame it on old age. I hooked up the power to LS+ and LS- and hooked up the speaker to + and -. The really embarrasing part is I am a retired electrical engineer with half a dozen patents! Just to be perfectly clear LS stands for Loud Speaker, not power! There, happy? P.S. After I corrected the wiring, it all worked fine with no apparent harm to either the speaker or the amp or the power supply. Last edited by Phil Olson; 11th January 2010 at 04:16 PM. Reason: Additional info.

12th January 2010, 07:08 AM	#7
Ltralus diyAudio Member Join Date: Dec 2009 Location: office	We knew that already. What was tested here I think was the SMPS's overcurrent protection, looks like it worked. The module would have completely fried without it, or blown the rail fuses that probably wouldn't have been installed, or likely fried them both along with the module had they been. __________________ James J.

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26th October 2009, 11:59 PM	#2
Phil Olson diyAudio Member Join Date: May 2006	Never mind! I found my problem and am way to embarrassed to admit what I did!

11th January 2010, 03:09 PM	#3
Session diyAudio Member Join Date: Sep 2005	Well, that is not very educational. Could you please explain were you went wrong? I am waiting on one of there puppies myself.

11th January 2010, 07:06 PM	#5
Session diyAudio Member Join Date: Sep 2005	Everyone can have a bad day right? Anyways, glad it worked out allright for you.

12th January 2010, 06:25 AM	#6
Tarzan diyAudio Member Join Date: May 2004 Location: Genk	Hey Phil, It can happen but now we are sure of the rugidness of the Hypex modules. Cheers, Tarzan

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