Sure, but my concern is about what happens when the SMPS goes from "the input voltage is too low, so I should not be on" to turning on and putting a load on the caps. Will the voltage drop below the switch-on voltage because the caps aren't being fed enough current to sustain operation, leading to oscillation? All depends on the hysteresis of the SMPS.
Ah, OK, thanks! Didn't know enough about the design of the SMPS600, and have had nasty experiences powering up computer SMPS's in current-limited systems (badly designed backup power supply systems).
It appears I have the same issue here. With one working {95% of the time} and one having the same cutting in and out. I do notice on the amps that the third pot is not in the same location, for each amp. So I am assuming its an adjustment issue? I was in contact with Ncore last week and they asked me if I had a voltage tester, and that was the last I heard from them.
Had similar problems/ Without warranty here the procedure written up by Ian based on my experience:
My Understanding of Jos's comment.
1. To adjust the DC offset of the input op amp
No input connected
No output connected
nAmpon disabled (disconnected from Gnd or Hi)
Adjust R95 for 0v between NI input and Gnd ( J9, P2 and P4)
2 To adjust the output DC level.
No input connected
No output connected
nAmpon enabled ( connected to Gnd J9.P4)
Adjust R136 for 0v between output + and output -.
3 To Calibrate the overvoltage
No input connected
No output connected
No DC power connected (No SMPS)
Apply 3.0v to the 5 pin Prog Header for a few seconds
P1 -ve P2 +ve (Pin one is near the red capacitors)
There are no adjustments to be made. ( I don't understand what is going on
inside the electronics, the 3v must be being used to charge a capacitor but
how does it hold its charge when power is removed - pass at the moment)
On power being re-established and nAMPON enabled the amp should switch on
right
WHAT DO YOU DO IF THIS DOES NOT WORK ?
I think everyone heard you the first time. I find myself failing to understand the logic of this: since you already know that Bruno is not the true God and NCORE is not the right religion (unlike the rest of us), what's the point in any further experimenting? I mean, let me take a wild guess and say that probably Al Qaeda hasn't turned into a Christian philanthropy organization as of yet.Lets see if the SMPS is better . In 2 weeks we will try. I do not believe Bruno is God as the rest of you.
useful and full of substance comment Erlend, like always. not to forget humorous and interesting. keep up the good work and don't forget to let us know when you've finally proven that NCORE sucks
useful and full of substance comment Erlend, like always. not to forget humorous and interesting. keep up the good work and don't forget to let us know when you've finally proven that NCORE sucks
I just finnished a much better amp. I do not say NCore is a bad amp . From upper midrange and treble it is for sure a very good amp. Maybee for basreflex the bass is ok too but not for my low Q system.
Some 0.22R or a cheaper coil on the woofer might do the trick with the ncore then
Some 0.22R or a cheaper coil on the woofer might do the trick with the ncore then
You are absolutely right . I had to do that trix on my Coldamps. My coils in my speakers is only 0,03 ohm.
I was told it was the "dead time" adjustment from a Mola Mola employee. How accurate was that answer being translated from German to English,
.
It is strange this tweaking is still necessary:
Maybe it is only true for units from batch wk21 and up?
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