Has any party finalized a chassis design available for immediate purchase?
I continue to be amazed that only Stig-Erik and one other nCore customer have posted their listening experiences. I decided to take the plunge and well certainly post my impressions in a couple of weeks after I get them built and compare them to an array of Class D and Class A amps.
I continue to be amazed that only Stig-Erik and one other nCore customer have posted their listening experiences. I decided to take the plunge and well certainly post my impressions in a couple of weeks after I get them built and compare them to an array of Class D and Class A amps.
Nice...
I look forward to hearing your impressions. I will have to sell something to jump into nCore, so I am waiting to get some listening impressions from a number of early adopters first.
I look forward to hearing your impressions. I will have to sell something to jump into nCore, so I am waiting to get some listening impressions from a number of early adopters first.
Hi Could you pls. clarify. What should be the correct procedure when connecting the SMPS to NC. As I read your note one should not try to power on the SMPS alone and then assemble the SMPS with the NC – is there a way of discharge the SMPS – because in my opinion I would do the same way as you did – try the SMPS without the NC connected just to make sure that they are working.
Pls. advice.
I really hope that all issues etc. are described in a paper delivered with the SMPS and NC modules. Even though its DIY and plug and play it seems like some precautions needs to be taken as the one you have described!
I’m waiting for the new batch which are going to be shipped end of January – just can’t wait J
Playing on the old UC400 which just sound great – so if NC400 is better in mid- and high range it will be HiFi Nirvana.
Regards Ole
zap4ever: I don't know if I'm the right person to say how you should do it instead, but I imagine that if I had just connected everything and powered all the modules up at the same time, it would have been fine.
back: after 3 hours there was still enough charge left to make sparks and noise.
There are a lot of pins on the smps, how exactly should one go about using a resistor to dissipate the charge?
back: after 3 hours there was still enough charge left to make sparks and noise.
There are a lot of pins on the smps, how exactly should one go about using a resistor to dissipate the charge?
Hi Zhai
What I don’t like is if this issue is not described in any way. It’s not unusual situation if you in the process of mounting the units in a cabinet need to dismount the units from each other. This reminds me of the old days with the first L.C. Audio ZAPpulse modules where many odds things happened caused by e.g. wires who should be placed in a special way, earth connection etc.
I just want to make sure that Bruno/Hypex addresses these issues in advance when we start building out new amplifiers so that we don’t start with frying our modules. Actually this is the first real hands on issue which is posted reg. the modules except for the questions about how to wire the NC modules.
Would be nice if Bruno drops a note saying that some kind of description is sent together with the modules about mounting and special considerations e.g. the issue with not connecting NC with PSU if the PSU has been connected in advance– which needs a work around don’t you think? I mean its most likely that you during assemblage e.g. when fitting them into some kind of closure needs to split the NC and the SMPS apart and the we have a problem which we by now don’t know how to solve…. Scary J
Regards
Ole
I'm not going to completely exclude the possibility that I've made some sort of mistake in the assembly of the amp, I just can't figure out what that would be. I tried to just follow the recommended way, and the only modification was to insert a small circuit to control a mains relay and a push button, otherwise everything should be as Hypex suggests.
I would also guess that if you disconnect the units from each other and connect them again, it doesn't make any difference unless the smps is powered on without the nc400 connected to it. I can't be sure of this, though.
I would also guess that if you disconnect the units from each other and connect them again, it doesn't make any difference unless the smps is powered on without the nc400 connected to it. I can't be sure of this, though.
Let's see, have we gotten any posts from the manufacturers since this thread was moved to the Vender's forum?
No we haven't. Maybe they are too busy preparing and shipping that second batch of ncores
No we haven't. Maybe they are too busy preparing and shipping that second batch of ncores
Yes I sure hope so!! Hello Bruno and Jan, where are youuuuu?
Mine are being machined this week. I should have them very soon. I don't have mocked up computer models but I should have real pics before too long.
I'm here lads. Busily routing circuit boards which I do with the kind of abandon normally only seen in 2-year olds. Hence the silence.
I didn't really follow but I hear that there's been some discussion about amps not surviving hot plugging (or what is effectively hot plugging with charge still on the supply). Actually I plugged amps into a charged supplies several times and nothing happened BUT I can indeed conceive of problems if the pins got connected in exactly the wrong order. Considering that I've tried to make the amps immune against just about every other calamity I think I'll try and work out how to get past this one as well. With a bit of luck it can be retrofitted on the current batch.
I didn't really follow but I hear that there's been some discussion about amps not surviving hot plugging (or what is effectively hot plugging with charge still on the supply). Actually I plugged amps into a charged supplies several times and nothing happened BUT I can indeed conceive of problems if the pins got connected in exactly the wrong order. Considering that I've tried to make the amps immune against just about every other calamity I think I'll try and work out how to get past this one as well. With a bit of luck it can be retrofitted on the current batch.
Don't know if they're related. Of course psu control should be using the control connector on the smps or by switching the mains (which is the implication of the above post) - so J1 or J3 - not making any changes to the umbilical between amp and smps
it shouldn`t cause problems to the ampa other than scare you.
what i do is to connect a resistor to each rail for a few minutes.
you can check the voltage drop with a DMM.
when it go down to 3-4volt you will have no more sparks.
the rest of the pins don`t need discharge.
Will it be possible for you to be more specific about exactly where you connect the resistor to discharge the PSU. Seems like this information could very soon become handy (vital I would say).
Regards Ole
SMPS questions
Dear all,
I am still puzzled about SMPS technology, but unfortunately I got no replies on my above questions. I have probably asked the wrong questions, which accounts for my lack of insight on the subject. If so, then please help me to ask "the right questions". In case, and I really doubt so, that no body actually knows anything about SMPS tech and sound, than that would also be a useful answer...
kind regards,
Dear all,
I am still puzzled about SMPS technology, but unfortunately I got no replies on my above questions. I have probably asked the wrong questions, which accounts for my lack of insight on the subject. If so, then please help me to ask "the right questions". In case, and I really doubt so, that no body actually knows anything about SMPS tech and sound, than that would also be a useful answer...
kind regards,
The SMPSU will first rectify the mains to provide a high dc voltage. For higher-power SMPSUs, this high voltage then powers a half or full-bridge transformer-isolated PWM output stage, with regulation of the PWM performed by a feedback loop from the dc output (often through an opto-coupler for isolation) into the control chip. Provided that the current-limit of the supply is not exceeded, there will be no advantage in using a PSU of a higher power than is neccessary.
You should post your questions in the "Power Supplies" forum and keep this thread clean. There is a ton of information around about SMPS technology here and elsewhere.
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