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Chip Amps Amplifiers based on integrated circuits

Looking for successful Zobel cases
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Old 21st May 2004, 02:32 AM   #21
Peter Daniel is offline Peter Daniel  Canada
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#9 here: http://www.diyaudio.com/forums/showt...ht=#post357726

Adding zobel makes no change.
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Old 21st May 2004, 02:42 AM   #22
Peter Daniel is offline Peter Daniel  Canada
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#42 http://www.diyaudio.com/forums/showt...=&pagenumber=2

Oscillation occur, zobel is suggested, but everything is fine after changing ground connections.
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Old 21st May 2004, 02:42 AM   #23
Fred Dieckmann is offline Fred Dieckmann  United States
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Quote:
Originally posted by Peter Daniel
Fred,

If I still was a moderator, I would ask you to stay on topic. Go back to your other favourite thread, if you have nothing (else related to the main subject) to say.

I didn't expect you'd be a game for GC boards

To make it clear for you, I'm looking for actual cases where Zobel was find useful, not theoretical. I don't know why this bothers you.

It doesn't. On the subject of moderation, your not a moderator, you resigned remember?

I believe I am still on topic. Your efforts to say otherwise smell of censorship. Maybe an official moderator can step in to make the judgment call. The measurements have been shown and you wanted to know more about moamps setup. I think you need enough theory to ask him what the capacitance of the speaker wire is. One can only wonder why you are trying so hard not to understand how the network works and how much capacitance is enough to be problematic without a zobel. What exactly is your agenda? You seem to think mine is selling everyone zobel networks I guess. I would just like people to understand how the circuit works and seem to be joined by others in this desire. Efforts to the contrary and self-serving motivations hardly contribute to learning and the free exchange of factual and verifiable information on the forum. This is not a matter of opinion type discussion or indecipherable theory. This is very straight forward electronics and an excellent subject for measurement and simple circuit explanations. Tell me in whose interest you are speaking and what is hurt (other than maybe your pride) by an understanding of how a zobel works. I really don't understand what you are afraid of .....
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Old 21st May 2004, 02:46 AM   #24
till is offline till
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peter, your examples above: should we really look on cases were people are not even able to put decoupling caps on the chips?
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Old 21st May 2004, 02:49 AM   #25
Peter Daniel is offline Peter Daniel  Canada
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#1 http://www.diyaudio.com/forums/showt...ht=#post268209

amp oscillates, zobel no help
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Old 21st May 2004, 02:51 AM   #26
Peter Daniel is offline Peter Daniel  Canada
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Quote:
Originally posted by Fred Dieckmann



It doesn't. On the subject of moderation, your not a moderator, you resigned remember?

I believe I am still on topic. Your efforts to say otherwise smell of censorship. Maybe an official moderator can step in to make the judgment call. The measurements have been shown and you wanted to know more about moamps setup. I think you need enough theory to ask him what the capacitance of the speaker wire is. One can only wonder why you are trying so hard not to understand how the network works and how much capacitance is enough to be problematic without a zobel. What exactly is your agenda? You seem to think mine is selling everyone zobel networks I guess. I would just like people to understand how the circuit works and seem to be joined by others in this desire. Efforts to the contrary and self-serving motivations hardly contribute to learning and the free exchange of factual and verifiable information on the forum. This is not a matter of opinion type discussion or indecipherable theory. This is very straight forward electronics and an excellent subject for measurement and simple circuit explanations. Tell me in whose interest you are speaking and what is hurt (other than maybe your pride) by an understanding of how a zobel works. I really don't understand what you are afraid of .....
Read again, I'm not concerned with Moamp setup, I know it's good.
I merely suggested that other people setups may not be up to the task.
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Old 21st May 2004, 02:58 AM   #27
Peter Daniel is offline Peter Daniel  Canada
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#26 http://www.diyaudio.com/forums/showt...ht=#post259811

amp oscillates, adding coupling cap to ground resistor (from -IN) solves the problem
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Old 21st May 2004, 03:06 AM   #28
Peter Daniel is offline Peter Daniel  Canada
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#40 http://www.diyaudio.com/forums/showt...=&pagenumber=1

Hissing problem, a guy adds additional series resistor with 10 turns of wire ari=ound it, hiss is gone
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Old 21st May 2004, 03:11 AM   #29
Peter Daniel is offline Peter Daniel  Canada
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#1 http://www.diyaudio.com/forums/showt...ht=#post206709

Zobel slightly modified, nevertherless still distorting. Placing higher value series resistor at the output helps.
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Old 21st May 2004, 03:14 AM   #30
Peter Daniel is offline Peter Daniel  Canada
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#2060http://www.diyaudio.com/forums/showthread.php?s=&postid=201392&highlight=#post201 392
Frank admits that zobel is better than nothing
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