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In Reply to: RE: I do! (nt) posted by RPMac on March 05, 2012 at 10:59:40
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Have Fun and Enjoy the Music
"Still Working the Problem"
Follow Ups:
I did as Jeff asked and contacted him. He sent me information for me to read.
If I started another thread, you, wheezer and others would jump in and tell us how stupid we were. I've read on other forums discussing low dcr power supplies by very knowledgeable people (without all the hostility that happens here)who believe there is merit to the idea...but with issues to be worked out. Isn't that what DIY is all about?
In the end, it's about enjoying the music!
Listening to my 300b's
Have a good day!
"If I started another thread, you, wheezer and others would jump in and tell us how stupid we were."
No, I don't believe that would happen. The trouble in the past has started when a thread is hijacked to turn it into a discussion of something different to what it was intended to be, particularly "LSES" or, to give it its re-baptized name, "Modern PS".
Nobody with any technical background on this forum ever said low DCR is not a good attribute. Although sometimes way too much emphasis is placed on it.But these "tuned" power supplies have some serious engineering issues. Those who choose to spend their money building should hear both points of view - don't you think?
Edits: 03/05/12 03/05/12
"But these "tuned" power supplies have some serious engineering issues. Those who choose to spend their money building should hear both points of view - don't you think?"
I don't agree on the "serious engineering issues" , however I do agree that both points of view should be considered.... maybe even built!
In all the LSES talk it seems one is attempting to tune the power supply to "follow music". Now how do we do that when music can be anywhere from a piano solo, full symphony, to heavy metal. And since an SE amp has a fairly constant current draw, what exactly are we following? Ahh, but that's why it seems to work on SE and not on PP.This idea that audio is "fast" is silly. Your home WiFi is in the ghz range. That's "fast" by electrical engineering standards.
I and others have explained why this power supply makes a "fast" sounding amplifier. It's adding the function of a dynamic range expander to the amplifier. It may sound exciting but it's no longer a true amplifier, it's more of a signal processor.
If you like that, fine. I use dynamic range expanders my self for older material however they are an outboard unit that can be switched out.
Edits: 03/06/12
----And since an SE amp has a fairly constant current draw...
On what sort of time scale? Instanteneously it varies all over the place. A Class A PP amp will have a much more constant loading of its PS in comparison.
As to the rest, the music signal will be effectively random, and the PS should not respond to it. Your singal processor idea is likely pretty close.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
You really don't have a clue Gusser!!!
And furthermore, you never HEARD this, have you ??
You are only theorizing and only just GUESSING.
The proof of the pudding is in the hearing.
Jeff Medwin
I have plenty of clues. These are tools an experienced EE has. The ability to look at a circuit on paper and analyze how it behaves in real life. Of course that's still no substitute for the ultimate test of building a prototype and testing, but analysis tools based on real life experience is what education and experience is all about. When Boeing designs a plane today do you think there is any doubt it will fly?You seem to like PSUD now although I saw a post from you around 2006 discounting it. Well PSUD is a primitive sim tool by today's standards. It's a great tool but hardly sophisticated. My point is much of today's electronic is never even bread boarded anymore. It goes from sim to PC board. The point is these sim tools are based on years and years of knowledge and experience. We now know how a circuit will perform in great detail even before it's built.
You response to this dilemma is to use your own words, "consistant". You have no technical rebuttle because it is you who doesn't understand how it works or what is really going on electrically. You like how it sounds and that's fine. Why not just keep it at that and let those with the knowledge, education, and experience determine why. Note that I never said it sounded "bad". I did say it is not an accurate representation of the input signal minus the gain. That is a fact and quite easy to prove on a test bench.
Telling experienced EEs and technicians they are clueless in circuit analysis with your technical background as a measuring stick is just labeling yourself a fool.
Edits: 03/06/12 03/06/12 03/06/12 03/06/12 03/06/12
hey-Hey!!!,
Random searching has value. I'll give as examples disccovery of the cocoa bean. I am sure lots of folks died in this experimentation; oooops, that isn't good to eat in quantity...this stuff OTOH has promise. Lots of pharmaceuticals arrived this way, curare, opium, tobacco...and so on. This sort of research process does have limitations, and they're pretty well understood( not to mention plentiful ).
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
Obviously I don't know the difference, but what I read being discussed was what Jeff is doing. If I had become a EE like I once thought, I'm sure I could discuss it more intelligently.
Yes, all sides should be discussed, but if all things followed "the book", where would innovation come from? I'm like Jeff in my profession, "outside the box"...so I guess I'm sympathetic.
I had a golden that looked exactly like Gus...brought back good memories. Goldens are the best pets ever!!!
"Goldens are the best pets ever!!!"
Golden what? Hamsters? Eagles? Sections?
Pet Goldens of all kinds....Golden Rivers, Golden Beauties, Golden Linings, Golden Ears, and Golden Nuggets.....hehe
golden years....yes I need some...these are my pets...
these golden moments, golden skies, and golden goddesses....mmmmmmmmmmmm....yes now we are talking....
hehe Golden Music, and Golden Good stuff to you,
-3db
How about Tweaks?
BTW, Nobody made reference to "stupid".
Edits: 03/05/12
Its not a tweak, except to those who don't understand it, like you.
Its truly good AUDIO engineering that produces a here-to-fore unobtainable high performance result, immediately heard and appreciated by LISTENERS.
Thats all it is.
Its not for conventional theorists who never LISTEN to it. But post as you like guys, even if you have ZERO practical experience with it.
Jeff Medwin
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