Franklin,
mira bo ta biba a momentu na Rotterdam, nos mester bebe serbesje un bes. (Macai Prudencia-101
)
mira bo ta biba a momentu na Rotterdam, nos mester bebe serbesje un bes. (Macai Prudencia-101
)
For clarity of levels, please refer to post #8623 on this thread.
For 'proof' please look at post #1355 on this thread as well.
For 'proof' please look at post #1355 on this thread as well.
A serious point. I enjoy listening to music. Would I make a decision to make design more accurate vs more pleasant, if I had access to a master tape comparison method or would I stick with making my personal listening experience more enjoyable?h_a said:
If accuracy was the goal I'd guess tone controls would be forbidden. Me, I think I'll stick to pleasant for me. Accuracy is a nice discussion point but as has been pointed out frequently, not really obtainable once a recording engineer twiddles the signal(s).
Do not misunderstand me, if a system reveals more information without unpleasantness then I prefer the more information answer, but I often hear equipment where more information is closely associated to a listener fatigue acoustical bright spot.
Re: Re: Emitter Degeneration?
Well whaddya know!
Somehow I missed that post... trying to read too much too fast I guess. But I was thinking of another place and author who did the same thing with FETs, and since this is the Blowtorch thread, I figured that FETs were more the focus...
But, what do you all think, an issue or not?
_-_-bear
forr said:
Well whaddya know!
Somehow I missed that post... trying to read too much too fast I guess. But I was thinking of another place and author who did the same thing with FETs, and since this is the Blowtorch thread, I figured that FETs were more the focus...
But, what do you all think, an issue or not?
_-_-bear
Re: Re: Re: Emitter Degeneration?
I think the jury is still out on that. Rather than sim, I measured actual JFETs,
cascoding them so that the Vds was held constant (important factor). I found
2nd and 3rd harmonic with no degeneration and no increase in 3rd or higher
harmonics with degeneration. It's my intention to repeat these experiments
more carefully, since the result flies in the face of the sims that have been
presented.
😎
BTW, there is more discussion on Bob's results in posts #2863 through 3842
or so in this thread.
bear said:
I think the jury is still out on that. Rather than sim, I measured actual JFETs,
cascoding them so that the Vds was held constant (important factor). I found
2nd and 3rd harmonic with no degeneration and no increase in 3rd or higher
harmonics with degeneration. It's my intention to repeat these experiments
more carefully, since the result flies in the face of the sims that have been
presented.
😎
BTW, there is more discussion on Bob's results in posts #2863 through 3842
or so in this thread.
As I wrote earlier, moamps included such comments for other designs on the website, which indicates that he is happy to acknowledge the work of others. This is something to be applauded when, for example, any number of industry application notes appear as 'original' designs on the web.
Indeed, the attributions I read were pretty generous considering what looked like worthwhile additions to what I would consider obvious beginnings.
But this forum is English language (only, usually), so leaving any attributions in the Croatian section, and not copying/transferring them to the English introduction, did allow for misinterpretation.
But as always, where there is a will, a way will always be found. Wars have started over less, folks, something to remember.
Final thought: how many people are just annoyed that someone has the requisite knowledge, time and enthusiasm to beat them to it? But it is so much easier to just talk...
It's hard to see how degeneration doesn't generate higher harmonic components. In Cordell's example the 'port' to which the feedback signal is returned isn't 100% distortion free, therefore the feedback correction must have residual error. However.... considering the 3rd in his example and assuming (simplistically) the distortion signature of the feedback return port is identical to that of the signal input, you would expect that -70dB 3rd to generate its own -70dB 3rd with feedback, meaning the 9th is already below the limits of the measurement shown. Add the effect of degeneration on the 9th and it could be even lower. Whether a generated 9th at -160dB is important is the deigner's choice.
Or my analysis could all be bunk.
Or my analysis could all be bunk.
PMA said:
I started to read it, but lost track of what he meant by 'reality'. What *does* he mean by that? I was first thinking he meant the 'reality' of the outcome of his sighted listening tests. Then I thought, na! Can't be! Or can it?
Jan Didden
Your analysis is right, but consider any function multiplied by fraction of itself. What happens to it's order? Pure math.rdf said:
john curl said:
Yep.
"Double Blind" testing is the method of FDA that rejects very effective medical means in favour of drugs because it is hard or impossible to test them double blinded. Dictate of enormously profitable and rich drug industry is adopted by AES.
So, my conclusion is, double blind means an agreement between FDA and AES: they are both blind organizations.
This is beyond 'good input, PMA'. This is great input! Especially Corey's 'If it ain't got that Schwing'. Quote: "The harder you listen, the less you hear" IT'S TRUE!
I liked this one too:
''Such people use science as a drunkard uses a lamppost: for support rather than illumination''
''Such people use science as a drunkard uses a lamppost: for support rather than illumination''
It's called the '3:15am effect'.
That state between waking-and sleeping.
In the monkey side of things, the brain components and and assocaiated hearing mechanism is most wake, clear, and aware at ~3:15am. That is when we are at our 'listening and discerning' best.
In the oldest days..the monkey sat in the tree..and dozed off..late at night.
The 'alarm system' would go into 'full power mode', at this time.
The hearing system would be as fully on, as a protection system-as it is possible to be.
Thus, I get my best musical enjoyment and highest powers of observation/discernment...right around that time..while half awake-half asleep.
That state between waking-and sleeping.
In the monkey side of things, the brain components and and assocaiated hearing mechanism is most wake, clear, and aware at ~3:15am. That is when we are at our 'listening and discerning' best.
In the oldest days..the monkey sat in the tree..and dozed off..late at night.
The 'alarm system' would go into 'full power mode', at this time.
The hearing system would be as fully on, as a protection system-as it is possible to be.
Thus, I get my best musical enjoyment and highest powers of observation/discernment...right around that time..while half awake-half asleep.
- Status
- Not open for further replies.