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In Reply to: You can't even remember what we're talking about! posted by E-Stat on March 12, 2007 at 06:55:55:
High output impedance is generally caused by feedback that is too low. Duh! So are the crappy distortion numbers which clearly show a poor open loop linearity. Some idiots keep saying that tubes are more linear than solid state. Your amp, and countless other tube amps prove just the opposite.
you still make me puke;
d.b.
Follow Ups:
I would like to see the distortion measurements of your amp with no negative feedback!! LOL! Talk about poor open loop linearity. Without negative feedback tubes are FAR more linear than SS, which is why it is possible to make good sounding amps without feedback. Try your amp without it, I dare you, maybe it won't blow up...maybe.
You don't have to see them, you can pretty much figure it out from the amount of negative feedback vs. closed loop distortion.
Duh!
It should be the following.
You don't have to see them, you can pretty much figure it out from the amount of negative feedback vs. typical open loop gain. Closed loop distortion vs open loop distortion cna be also pretty figured out pretty much the same way.Now smart ass; if you had bothered to read some of the material I suggested you would know that. It certainly appears that you would rather lie and throw out accusations that can't stand the light of day.
Duh!
Seeing as I don't have the original closed loop measurements I can't really calculate anything from your non-providin' information ass, can I? Its pretty hard to calculate something from nothing. If you give me all your data then I will see for myself. If you don't then be so kind as to give me a ball park figure? 10% THD, 20% THD, more? Is it even stable without negative feedback? Come on Dano, you can at least tell me that, or haven't you tried?
The closed loop measurements are on the web site. 0.1% THD, all second order distortion, and 26db gain. Once again you are proving to me and the rest of the world, that you don't have a clue about how feedback works. Given that you write for a magazine that gives design awards to clever little clocks, I'm not surprised.
d.b.
No, Dan I don't want your "specs". I have seen way too many, shall we say optimistic, specs. Most companies specs don't hold up to even Stereophile or Soundstage measurements. I will believe your specs when I see independent measurements."Once again you are proving to me and the rest of the world, that you don't have a clue about how feedback works."
Oh and how am I proving that? By not believing your specs at face value, sorry Dano been around hifi too long for that. After all you can't even give me a schematic of a working amp how should I trust your specs.
There isn't ONE amplifier on either stereophile or soundstages website that has only 2nd order harmonic distortion. Not one.
How ironic it must be for you that the one of the only real reviews you got was from a magazine that gives awards to clever little clocks!! LOL! Yet you have no problem pointing to your review as valid, right? Did YOU get a CLC yet, Dano?
P.S. The last model number of the VTL amp you said you had claimed no negative feedback. Are you changing model numbers in mid arguement, or do you not know the difference between local feedback and negative feedback?
Given your unsavory reputation, I suspect both.
You make me puke;
d.b.
You make me laugh!
"You make me laugh!"
Glad to hear that, I always suspected ignorance was bliss. I also note that you didn't deny my previous post, which is another indication that your ignorance is bliss.
Have a nice day;
d.b.
Still waiting for substantiation to your claims and whatever you were trying to say about the last model #.
nt
you are unable to understand the difference between zero and 15.
Are you able to understand the difference between local feedback and negative feedback?
Give us the difference between the two, simple english will do fine here, as I'm not expecting much of anything else at this point.
d.b.
My Threshold Stasis, for example, uses zero global NFB between the input and output stages, but does employ some local NFB.The VTL, on the other hand, uses minimal amounts of global to keep the source impedance as low as 1.5 ohms.
Since you will forget this information an hour later, I'll put in some keywords to find this later.
DAN CAN'T REMEMBER $HIT FROM DAY TO DAY
There is a difference between global feedback and negative feedback.
Do you know what it is?
Surprise me for a change. BTW: I'm still waiting for a rudimentary definition of negative feedback and local feedback.
Any time this week bubba;
d.b.
Cite "proof" that my VTL map uses zero feedback.
Cite "proof" that I have spoken about anything other than my MB450s following your wild-assed-guess to the contrary.
I can't discuss feedback with someone who doesn't understand the basic rudimentary definitions.
Get a freakin clue!
d.b.
who continues to make false accusations and fails to back them up.Bye.
Well I 'm certainly glad you don't take yourself too seriously, given your level of ignorance I concur that it would be a bad move on your part.
I will try to my best so that in the future I will not take you seriusly either. Given your posts until now, I don't that will be all that difficult.
Have a nice day;
d.b.
P.S. Whenever you decide to learn the differences between negative feedback, global feedback , and local feedback, please let us know.
rw
I'd like to forget you, but the &hit you keep putting on this board makes it tough. You can't tell the difference between your lack of taste vs. accuracy.
Have a nice day;
d.b.
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