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Influence of the delay amplifiers for listening characteristics
Influence of the delay amplifiers for listening characteristics
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Old 19th December 2009, 08:04 AM   #61
Federmann is offline Federmann  Czech Republic
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Send a message via ICQ to Federmann Influence of the delay amplifiers for listening characteristics
Quote:
Originally Posted by Upupa Epops View Post
We are not interested for your prehistory circuits from the year 65' or so...
Please Do I just what you're interested. I do not know of anyone who did Vdif dependence and feedback, even in 1965. Can you please give a link? I'm interested.

I wish a beautiful day
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Old 19th December 2009, 08:20 AM   #62
akis is offline akis  United Kingdom
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Could anyone please explain in English what this is all about? Looks really interesting.
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Old 19th December 2009, 08:30 AM   #63
Upupa Epops is offline Upupa Epops  Czech Republic
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What is direction of your claims ? At your pages you say, that is correlation between value Vdif and " transistor sound " - do you have some credible evidence proof for it ? Independent listening tests, made by others, not by you ?
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Old 19th December 2009, 08:31 AM   #64
Don Hills is offline Don Hills  New Zealand
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As I read it:
He sees a delay between the input signal and the output signal. (Another way of describing phase shift.) He wonders if it is audible.
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Old 19th December 2009, 09:03 AM   #65
Upupa Epops is offline Upupa Epops  Czech Republic
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No, he claims it...
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Old 19th December 2009, 09:23 AM   #66
BV is offline BV  Slovakia
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Mr. Fedemann is posting only simulations and claims, never showed measurements (distortion, SR with load..) of really operating (and reliable) power amplifier or any proofs for his claims. Never answered direct questions, only with "side steps"...But 3D simulations of PCB are nice
His last finding-local NFB is very bad, only valuable is global NFB...

Last edited by BV; 19th December 2009 at 09:26 AM.
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Old 19th December 2009, 09:51 AM   #67
akis is offline akis  United Kingdom
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Quote:
Originally Posted by Don Hills View Post
As I read it:
He sees a delay between the input signal and the output signal. (Another way of describing phase shift.) He wonders if it is audible.
Unless it is a varying phase shift (with time, frequency, amplitude) how would you tell?

What causes phase shift in a normal audio circuit? There must be some capacitors somewhere.
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Old 19th December 2009, 11:13 AM   #68
Federmann is offline Federmann  Czech Republic
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Send a message via ICQ to Federmann Influence of the delay amplifiers for listening characteristics
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Originally Posted by akis View Post
Unless it is a varying phase shift (with time, frequency, amplitude) how would you tell?

What causes phase shift in a normal audio circuit? There must be some capacitors somewhere.
Influence of the delay amplifiers for listening characteristics


Phase shift caused by the internal structure of the transistor. I use such a model.
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Old 19th December 2009, 11:20 AM   #69
Federmann is offline Federmann  Czech Republic
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Overall feedback characteristics will improve.

Influence of the delay amplifiers for listening characteristics



Local feedback properties deteriorate.

Influence of the delay amplifiers for listening characteristics
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Old 19th December 2009, 11:25 AM   #70
Federmann is offline Federmann  Czech Republic
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Send a message via ICQ to Federmann Influence of the delay amplifiers for listening characteristics
Distortion is inversely related to reserve profits. The overall feedback gain improves. Local feedback gain worse.

Influence of the delay amplifiers for listening characteristics


Influence of the delay amplifiers for listening characteristics
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