Dr.H said:
Not perfect. It does not provide ground isolation. IIRC ecdesigns tried additional switching but didn't like the sound. Still, a viable alternative. This thread is not going too well anyway. It seems to attract the usual detractors who have made their mission to deny the purpose of any audio system exceeding PA quality.
How about a switched inductor rather than a switched capacitor? Being more specific, a "switched coupled inductor".
Oh, then we would have a flyback SMPS
Consider that inductors allow for hard switching and high efficiencies, and for mains isolation too...
In fact, every off-line SMPS is just a "Never-connected Flying-coupled-inductor" system.
Oh, then we would have a flyback SMPS
Consider that inductors allow for hard switching and high efficiencies, and for mains isolation too...
In fact, every off-line SMPS is just a "Never-connected Flying-coupled-inductor" system.
I have followed this thread from the beginning and feel it is time to say something. As Eva and syn08 have pointed out, at least to those that will listen, every thing proposed in this thread that WILL work has been done (long ago) and is well understood by engineers. I know this because I had the privilege to work with the engineer that holds the patent on many of these designs and several more that have not (but probably should be) discussed on these forums. That engineering grope also designed and marketed off line power supplies and BATTERY CAHRGERS that met all safety standards in the US, Canada and Europe.
I still see this person on a very regular basis and we drink beer together and talk audio, SMPS (his specialty), and safety in commercial electronics (another speciality of his). I will attempt to have him contribute here in whatever way he feels is appropriate.
I do not doubt that many of the ideas put fourth on these forums seem original to the person posting them. Do a little research on line. You may save yourself the embarrassment of having pointed out publicly that your "new" design just might be 40 or more years old.
I still see this person on a very regular basis and we drink beer together and talk audio, SMPS (his specialty), and safety in commercial electronics (another speciality of his). I will attempt to have him contribute here in whatever way he feels is appropriate.
I do not doubt that many of the ideas put fourth on these forums seem original to the person posting them. Do a little research on line. You may save yourself the embarrassment of having pointed out publicly that your "new" design just might be 40 or more years old.
Hello
How about just a passive filtering with ground filtering like that ?
Bye
Gaetan
How about just a passive filtering with ground filtering like that ?
Bye
Gaetan
An externally hosted image should be here but it was not working when we last tested it.
Steve Dunlap said:
What on earth are you talking about? The thread bears a very clear name. Did you read it? No claim has been made about a "new" design but rather a possible clone of an existing commercial design. To the best of my knowledge this concept has not been commercialised elsewhere. You are welcome to post links taken from your drinking buddy.
I personally find the idea of removing the effects of power cords and power conditioners very encouraging.
Hi darkfenriz,
I only responded to a report. I had no idea how far back / down these iffy posts went.
How about the following rule that I'm sure you have all heard?
If you can't say something nice, then don't say anything at all.
There is no reason to get personal here. I was under the impression we had all passed kindergarten.
I will leave the previous posts in place. They show where the problem posts were heading, and by whom they were penned.
-Chris
Sigh ......
I only responded to a report. I had no idea how far back / down these iffy posts went.
How about the following rule that I'm sure you have all heard?
If you can't say something nice, then don't say anything at all.
There is no reason to get personal here. I was under the impression we had all passed kindergarten.
I will leave the previous posts in place. They show where the problem posts were heading, and by whom they were penned.
-Chris
roender said:
If you use an effective isolator circuit in the post-rectifier power supplies (that isolates the grounds as well as positive and negative rails), my experience is that you will be hard-pressed to hear any effects of a CM choke.
Likewise for the effects of power cables and conditioners. However, you may be able to detect some effects if voltage fluctuations occur.
Comment to Steve: If there was a posting requirement that stipulated that the subject material being discussed or considered needed to be original and not previously invented, the diyAudio website would collapse due to a dearth of posts.
regards, jonathan carr
analog_sa said:
The name of this thread (as I read it) is:
"My idea for Flying Cap or Never-Connected PSU"
If I made the claim that I had "my idea for a circuit" of any type you would not think it might be considered "new" by me? And yes I read the thread you reference. The fact that an existing design is not known to you does not mean it does not exist. Even the award of a patent is no guarantee that prior art does not exist.
It may come as a surprise to you also, but there isn't a link to every patent or every piece of industrial (read commercial) research and development.
Comment to Steve: If there was a posting requirement that stipulated that the subject material being discussed or considered needed to be original and not previously invented, the diyAudio website would collapse due to a dearth of posts.
regards, jonathan carr
I do agree with most of that, however when one claims an idea is their own, they should have made some effort to assure that it is. In the threads I have followed so far, credit has been freely given (usually) to existing designs. The poster then goes on to explain why they have selected the design and what they have done or plan to do to personalize it as a contribution here. I certainly have no problem with that.
A number of people have called my design a "diamond buffer". Why did I not give credit? I have not yet found the origin of the circuit they are calling a diamond buffer (which is quite different than mine). I did mention the circuit that I started with as a foundation for my design and it is at least 35 years old. My variation of this circuit is 25 years old and yet it still gets called a diamond buffer.
Maybe my years in R&D have made me too sensitive. My intent was not to offend. It does sometimes seem that knowledge and experience are viewed as a handicap here.
regards, jonathan carr
I do agree with most of that, however when one claims an idea is their own, they should have made some effort to assure that it is. In the threads I have followed so far, credit has been freely given (usually) to existing designs. The poster then goes on to explain why they have selected the design and what they have done or plan to do to personalize it as a contribution here. I certainly have no problem with that.
A number of people have called my design a "diamond buffer". Why did I not give credit? I have not yet found the origin of the circuit they are calling a diamond buffer (which is quite different than mine). I did mention the circuit that I started with as a foundation for my design and it is at least 35 years old. My variation of this circuit is 25 years old and yet it still gets called a diamond buffer.
Maybe my years in R&D have made me too sensitive. My intent was not to offend. It does sometimes seem that knowledge and experience are viewed as a handicap here.
jcarr said:
If, with an "effective isolator circuit in the post-rectifier power supplies", your are attempting to address the issue of RF ingress via the mains lead then you are attempting to deal with a problem too far down in the chain.
So what is the point?
Long twisted (or otherwise) mains carrying wires out to fuse holders, power-on neon’s or front panel mounted power switches will all radiate RF noise within the case.
Inter-winding capacitance of large transformers (especially toroids, but less so with split bobbin EI) is a very effective RF connection between the mains and the post secondary power supply circuitry.
The aim here should be to attenuate any RF ingress right at the source, and this will typically be right where the mains lead enters the case. Here RF issues can be dealt with more effectively and with minimal complexity.
That so far none of the experts in this thread have belaboured this obvious and most important fact begs a question.
Cheers,
Glen (currently putting together his SSB exciter which will install in a rack above an 8kVA mains transformer and below a 3kW RF dummy load).
G.Kleinschmidt said:
I fully agree, and I assume (and hope) that everyone else who has contributed to the thread so far agrees, too. IF the idea is to address the issue of externally-originating RF ingress via the mains lead, common-mode filters will be much cheaper, simpler and effective.
IF.
jonathan carr
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