Money is irrelevant. Someone much cleverer than me has found a way of making a bipolar converter with a single active coil (and two additional). I don't know how, nor particularly care, because I have nothing to prove, nothing to lose. I never claimed to be an smps specialist. I just buy them.moamps said:
moamps said:
I's new product, I didn't try it so I don't know is the additional filtering needed or not. So please don't listen to my advice.adamasnan said:
It's pretty much the same as if someone told you "here are a few resistors and just one transistor and make me a push-pull amplifier". Using only that one IC and one active coil, bipolar output voltage cannot be produced. Purely out of scientific curiosity, I bought these two SMPSs, so we will soon know exactly what they are about.abbey road d enfer said:
No. It's someone that says "I have made something out of this and this" and you say it's impossible.moamps said:
It is clear to me that the problem is actually what I said. Nevermind. We'll find out soon who's right.abbey road d enfer said:
When I wrote "I give him the benefit of the doubt, until proved wrong (or right)", I was not referring to you. I was just meaning that I could be right or wrong to believe this product works.moamps said:
Then why do you moderators feel such a need to quote almost all my posts? Am I talking nonsense?abbey road d enfer said:
You should start acting according to the signature you wrote yourself.
Ooops... I just quoted you too... :moamps said:
Please calm down. I tend to quote either stupid or interestinf posts. Pick your choice.moamps said:
No, but sometimes you profer opinions that would benefit from being substantiated. AS I DO, ALSO, SOMETIMES. If that happens, I try to analyse why I did something wrong and make amends. Haven't you noticed that?
I"m glad you recognize that.
I think you're projecting your way of thinking on me. I don't want to compete with anybody. I have enough flying hours, I don't need medals.
Give me proof that I have acted contrarily. You'd be surprized at the number of cases when I had to admit wilfully that I was wrong or misleaded. Please read carefully and analyse my posts in this thread. Your position is very hostile, while I was suggesting something that we don't know makes this product work. I only made suggestions and guesses and warned that I was not the most competent person on the subject.
Unfortunately most of these rants are not very useful to you.adamasnan said:
I'm sorry if I was rude and hostile to anyone, and I apologize for that. You said "while I was suggesting something that we don't know makes this product work". We? I don't know about you, but I know how such SMPS can work and what it can't do, and I'm trying to explain it to you, but you refuse to understand it. We may be lost in translation, which I am probably most to blame for. BTW, I made my first SMPS with bipolar output voltage approximately 30 years ago, using LM711 comparators and one 12V SLA battery for powering field audio recording equipment.abbey road d enfer said:
I maintain that we, you and me, and probably others, don't know what makes it work, because it actually works. If we had a schemo, we may know why. You certainly know how an smps works, but saying this particular one does not work when there's evidence that it does work shows you don't know everything.moamps said:
It'll be our loss...
As you know, I'm not interested in who is right.
I suggest you re-read the original post.
Why would you bother? That SMPS is just cheap knock-off parts (never heard of XLSEMI) with a bunch of chokes in series as a poor excuse for a transformer. It might be fine for fixing the old Realistic receiver in the wood shop but it's almost certainly a disaster for pro-audio. Not all SMPS are created equal. I have always had good results with MeanWell SMPS.moamps said:
moamps said:
How can you be so affirmative of a product you don't know? The video provided by moapms shows that it's a quite interesting product.squarewave said:
I don't think it's too much of a leap to say that it's not going to work that well. Clearly with 3 cheap chokes for coils the leakage inductance probably stinks, it's not isolated and they're not even shielded. Even the usual cheap China ones from Ebay use shielded inductors. And I don't know what you find that interesting about it. It's just generating the negative voltage from the positive using a voltage multiplier technique so that they don't have to use a specialty transformer. But now the feedback is not coupled to the negative rail and the diodes are probably making noise at half the switching frequency. The more I look at it, the more I hate it.abbey road d enfer said:
The links provided by moamps clearly show that it does work well.squarewave said:
So you are assessing the performance of a product by looking at its components. Don't you know components are just a fraction of what makes a circuit tick? Design is the most important factor. You can't judge a book by looking at its cover.
I said it's interesting because it goes against preconceived ideas, formulated by moamps who said it couldn't work, which he admitted was wrong.
That's what I suggested when I wrote "I imagine where there's a square-wave, there's a way to produce rectified voltages of both polarities."
I repeat you can't judge a product by just looking at it.
