Mister 45, everyone is allowed to have his own opinion. You are the one who is trying to hijack the thread with your superiority. Though it is not informative, but it would be nice if you had a respect for others. If you have objections to someone’s views, you are welcome to present your arguments.
This is only MHO.
My opinion is the contrary Mr AndreK: you are the one that hijacked the thread in the first place thinking to be superior. You wrote:
Did really you think that you needed to explain anything new? Those formulas are from old books and even if someone doesn't know the theory of electromagnetism or exact definitions is irrelevant in practice because they are not necessary to make a good transformer. Finally, if you thought you needed to explain you would just do it instead of writing something that doesn't make the point, because Bdc will increase if more turns also when the practical formula is used until it will start saturating.
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The big deal is that different cores have different properties; different winding schemes have different properties and so on.
I don't think you start winding when your customer asks for a wooden core transformer, so his decision depends on the advice you will give him within the possibilities setting the margins (but you know that....).
I don't think you start winding when your customer asks for a wooden core transformer, so his decision depends on the advice you will give him within the possibilities setting the margins (but you know that....).
I don't think anyone denies it, but for what reason should we fight over about it?
Look, you don't really know what I do know, and what I don't.
The argument started when I said L has nothing to do with Bdc, except for convenience.
And that is exactly what I said, Bdc will increase with the number of turns, did not I?
You admitted you never wind transformers yourself, so you just throwing expressions and formulas, which is fine, how about common sense? How about your own experience? How about your own findings, do you have anything to share?
Sorry, I am getting too emotional here.
I am afraid you did not talk about convenience. You were arguing against a formula because you thought it was wrong. I was not born yesterday!
I said I used to wind my transformers, I know how to make them. Sorry if I don't post pictures but I am not a social network guy who takes pictures and posts everything he does in his private life to show off. By the way, until you kicked in with your un-necessary comment I did not post. Can you read? Probably not, as from your own admission, you are getting emotional. But make no mistake, it's nothing personal.
I said I used to wind my transformers, I know how to make them. Sorry if I don't post pictures but I am not a social network guy who takes pictures and posts everything he does in his private life to show off. By the way, until you kicked in with your un-necessary comment I did not post. Can you read? Probably not, as from your own admission, you are getting emotional. But make no mistake, it's nothing personal.
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See what I said?
45, it is pointless to argue with you. No matter what, you will try to reject the obvious.
Simple example:
R=E/I
does I depend on E?
yes, but it does not mean R depends on E.
Is it simple enough?
Yes, it is better that you stop arguing because you wrote that after I did some maths to show where those formulas were coming from. No one was talking about dependence or assuming a particular meaning except you. Your example is pointless and actually highlights your attitude.
If you want I can show you how to derive the expression for magnetic field and induction starting from the general Maxwell equations. If I were really as you would like to believe I would have done that.
If you want I can show you how to derive the expression for magnetic field and induction starting from the general Maxwell equations. If I were really as you would like to believe I would have done that.
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That relative permeability of 440, is for refrigirators power transformers...
Sorry bu these laminations are not for audio aplications.
In conjunction with standard window (small space) for windings will lead to rationalize the music type can be listened with this SE amp...
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Try with rel. permeability of standard 800...
440 is the permeability with small signal. It will increase with signal. Try to make a real audio transformer instead of using a transformer from a refrigerator. Then we can talk.That relative permeability of 440, is for refrigirators power transformers...
Sorry bu these laminations are not for audio aplications.
In conjunction with standard window (small space) for windings will lead to rationalize the music type can be listened with this SE amp...
.
Try with rel. permeability of standard 800...
Here is one example:
https://tango-trans.com/wp-content/uploads/catalog/X-10S.pdf
it's 65H for 1 mW and 80H large signal. The change happens for EVERY transformer with ANY core type. It depends on the ratio between aig-gap and mean magnetic path length, core permeability and actual induction to which it's referred. So in some cases there is more change and in others less.....
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No that is not true...
IF somehow magicaly it is true then the amplifier will have dramaticaly different transfer in the low end with 1W and 10W power...
BUT IT IS NOT THE CASE
You can easily prove to yourself by measure the device with small signal input and large one.
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BTW i made some output transformers long before you aplied to this forum
(Mine for 2A3 had -3db 8Hz/100Khz, but it winded on brand VAC cores for audio applications.)
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Please check the [units] in your formulas they shoud be compatiobile, same from each sides of equations...
BTW i made some output transformers long before you aplied to this forum
(Mine for 2A3 had -3db 8Hz/100Khz, but it winded on brand VAC cores for audio applications.)
.
Please check the [units] in your formulas they shoud be compatiobile, same from each sides of equations...
No offense, but your language consists of petty low-level nagging.
And yes, permeability changes with excitation level, so transfer characteristic will vary. If you deny this fact, I wouldn't be bragging on transformer knowledge if I were you.
P.S. It it also measured, I believe Menno van der Veen wrote an article on this one. You can google that.