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Old 20th May 2012, 10:10 AM   #4081
niekos is offline niekos  Netherlands
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Join Date: Oct 2011
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Quote:
Originally Posted by jmbulg View Post
Had similar problems/ Without warranty here the procedure written up by Ian based on my experience:

... instructions for DC and calibration reset

hypex ncore

Thanks for these instructions, but before I will calibrate, I tried the last step several times (using two alkaline 1,5 v batteries; according to my volt meter 3,2 volts in series).
Is this enough? I tried this several times as described.

After this step however, with nothing connected, the problem remains, the smps just seems to keep clickicking (protection I guess?).
I added a link to a sample I made of the clicking sound, I am not sure if this happens I can calibrate at all?
No lights are lit on the amp, I guess before that the amp might be switched of already?

Last edited by niekos; 20th May 2012 at 10:18 AM.
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Old 20th May 2012, 11:02 AM   #4082
Julf is offline Julf  Europe
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Quote:
Originally Posted by niekos View Post
Thanks for these instructions, but before I will calibrate, I tried the last step several times (using two alkaline 1,5 v batteries; according to my volt meter 3,2 volts in series).
You did notice the "No DC power connected (No SMPS)"?

Does the SMPS itself start up and stay on OK (without the nc400)?
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Old 20th May 2012, 11:32 AM   #4083
niekos is offline niekos  Netherlands
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Yes, SMPS was disconnected (nothing connected actually), so just the NC 400 module I applied the 3 V to pin 1 and 2.
When I disconnect the NC 400 form the SMPS600 and witch the SMPS on it clicks after 2 seconds once, and I expect that it is on. So no repetitive clicking sound every 2 sec, so I expect it to be ok?
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Old 20th May 2012, 12:00 PM   #4084
Julf is offline Julf  Europe
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Quote:
Originally Posted by niekos View Post
So no repetitive clicking sound every 2 sec, so I expect it to be ok?
Might still be worth verifying it with a multimeter.
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Old 20th May 2012, 12:08 PM   #4085
niekos is offline niekos  Netherlands
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Quote:
Originally Posted by Julf View Post
Might still be worth verifying it with a multimeter.
I will, just to be sure.
But I suspect/hope that the SMPS is fine, and the NC400 is locked in some error state. I hope I will be able to clear it somehow, maybe my battery powered reset is on pin 1/2 is not good enough? Is it to clear some flash memory/flush error state?
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Old 20th May 2012, 12:37 PM   #4086
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Quote:
Originally Posted by Trevor White View Post
A milliohm output impedance should be more than adequate for the job
Seems like you have never listened to a low Q system.
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Old 20th May 2012, 12:42 PM   #4087
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Quote:
Originally Posted by Erlend Sæterdal View Post
Seems like you have never listened to a low Q system.
Could you explain how your "low Q system" is specified (value of system Q; -3dB LF bandwidth)?
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Old 20th May 2012, 12:49 PM   #4088
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Quote:
Originally Posted by StigErik View Post
At DC possibly. But how much at 50 Hz you think?
Wouldn´t that depend on the reactance of the coil, hence its inductance as you probably know...

If you imply to simply collate what make up the total impedance in terms of assessing the theoretical damping factor of the system (in relation to frequencies), then my guess is that something important is left out.

Have you tried various coils and resistors and heard their effects on a (bass) system?

cheers,
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Old 20th May 2012, 12:56 PM   #4089
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Quote:
Originally Posted by Erlend Sæterdal View Post
Seems like you have never listened to a low Q system.
My humble guess is that the low out put impedance was implied to maintain a low Q for the system.

It could sound like that you have gone to great lengths to get a low Q on the speaker side of things -only to depend on having some output resistance on the amplifier end. Nothing wrong with that, but a 0,03R coil sounds like an expensive solution if you really don´t want a total system Q that is as low as it provides.

What kind of woofers and enclosure do you have and whats the rest of the filter on the bass section, if I may ask?
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Old 20th May 2012, 12:56 PM   #4090
Julf is offline Julf  Europe
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Quote:
Originally Posted by niekos View Post
I will, just to be sure.
But I suspect/hope that the SMPS is fine, and the NC400 is locked in some error state. I hope I will be able to clear it somehow, maybe my battery powered reset is on pin 1/2 is not good enough? Is it to clear some flash memory/flush error state?
As I understand it, it forces the onboard supervisor to recalibrate itself.
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