Author Topic: Recyling scrap Ferrites?  (Read 5695 times)

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Offline tooki

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Re: Recyling scrap Ferrites?
« Reply #25 on: September 23, 2017, 04:07:56 pm »
Oh, this was definitely me making the mistakes, and THANK YOU, Tim for correcting me!
cdev, I’ve mentioned your quoting difficulties to you repeatedly, offered to give you a 1-on-1 tutorial... what’s it gonna take? I still don’t understand what method you’re using to create your mangled quotes. Meanwhile, the BBcode syntax for quoting is simple, but for basic quoting you don’t even need to know it, you just click the Quote button on a post to reply with that post quoted. (You just mustn’t insert any text of your own between the quote tags, because then your text is not separated from the quoted text.)
« Last Edit: September 23, 2017, 04:15:33 pm by tooki »
 
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Online cdev

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Re: Recyling scrap Ferrites?
« Reply #26 on: September 23, 2017, 04:53:23 pm »

Usually I just remove whatever isn't relevant, by just leaving the words I want to respond to, unmodified.

I am using the quote button. I usually try to before I hit quote, highlight the text I want to quote. In some (most) forum programs that will result in a new textarea appearing that contains just the highlighted text. That didn't work for me just now, instead I got the whole post. So, without touching the quote tags, I deleted the parts of it (like my own post) that were extraneous to what I wanted to say. Now I'm going to preview it.

It looks okay, so I'm hitting "submit".

Quote from: tooki on Today at 10:07:56
I still don’t understand what method you’re using to create your mangled quotes. Meanwhile, the BBcode syntax for quoting is simple, but for basic quoting you don’t even need to know it, you just click the Quote button on a post to reply with that post quoted. (You just mustn’t insert any text of your own between the quote tags, because then your text is not separated from the quoted text.)
"What the large print giveth, the small print taketh away."
 

Offline CatalinaWOW

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Re: Recyling scrap Ferrites?
« Reply #27 on: September 23, 2017, 05:23:06 pm »

Usually I just remove whatever isn't relevant, by just leaving the words I want to respond to, unmodified.

I am using the quote button. I usually try to before I hit quote, highlight the text I want to quote. In some (most) forum programs that will result in a new textarea appearing that contains just the highlighted text. That didn't work for me just now, instead I got the whole post. So, without touching the quote tags, I deleted the parts of it (like my own post) that were extraneous to what I wanted to say. Now I'm going to preview it.

It looks okay, so I'm hitting "submit".

Quote from: tooki on Today at 10:07:56
I still don’t understand what method you’re using to create your mangled quotes. Meanwhile, the BBcode syntax for quoting is simple, but for basic quoting you don’t even need to know it, you just click the Quote button on a post to reply with that post quoted. (You just mustn’t insert any text of your own between the quote tags, because then your text is not separated from the quoted text.)


Each forum has a style, which the members get used to and come to like.  In this forum, quoted material is normally highlighted by a colored background and precedes the response.  Cdev, your method doesn't produce this.  There is no trick involved in following the forum style.  You hit the quote button.  In the resulting form you will find an initial line enclosed in square brackets which identifies the source, message number and time.  Don't touch that line.  The quoted message follows.  It is terminated by a line with /quote enclosed by square brackets.  Leave that line alone also. 

You remove extraneous information, highlight, bold and otherwise modify the quoted information to your hearts content within the quoted message, though it would be totally unethical to actually change content of a quote.

Then put any response you have after the square bracketed terminator for the quote. 

This is a simple procedure and will make your responses much easier to comprehend and less annoying to members of this forum.   There are more advanced techniques possible that let you quote from several messages in a single message, but no need to go there to start. 

 I would assume that members of this forum adopt the styles of other forums when they are there.  Please join us in the style of this forum.
 
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Online T3sl4co1l

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Re: Recyling scrap Ferrites?
« Reply #28 on: September 23, 2017, 06:40:14 pm »
Are you using the WYSIWYG editor?

(To turn it off, go to Profile, Look and Layout, "Show WYSIWYG editor on post page by default".)

Tim
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Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 

Online T3sl4co1l

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Re: Recyling scrap Ferrites?
« Reply #29 on: September 23, 2017, 06:57:51 pm »
(this is actually a serious post, since the subject of what happens when ferrites are used in coatings and building materials came up. Likely it does do more than just "something" at GHz frequencies, I think thats likely already quite well established.)

What happens when one coats a conductor or transmission line that carries signals with a "sparse" well dispersed ferrite material?  Ferrite beads being "hard edged" i.e. well defined in terms of their boundaries would likely be different than a well dispersed ferrite loaded material???

Wave effects are indeed relevant in ferrite: the impedance curve of a ferrite bead depends on its shape.  Longer and thin beads have kind of a shoulder at medium frequencies, then a peak at higher frequency.  Wide and squat beads have one high peak.

The velocity of propagation at mu=100 and k=10 (ballpark figures) is about c/32, so you get what looks like a 1/4 wave shorted stub at 300MHz with a thickness or height of only 8mm.  But it's a very lossy stub, so it's not an infinite impedance at the resonant frequency, it's only a modest peak, and fairly wide (Q < 1).

And, like I mentioned before, pulse applications benefit from spacing in a stack, so that when the ferrite is forced into saturation (for the case of a magnetic compressor), the rise time of the resulting shock wave is faster than if solid ferrite were used.

As for wires coated with stuff, there's this oddball product:
http://www.surplussales.com/Wire-Cable/Wire7.html
Can't figure out who made it, or what specs it meets, aside from what they give there.  Very weird, but indeed useful if you can't find the space to fit a regular filter module in your system.

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 

Online cdev

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Re: Recyling scrap Ferrites?
« Reply #30 on: September 23, 2017, 07:23:31 pm »
I was but I turned it off. I have no problem with using "bbcode" when I need to add a link or something, simple works for me. My question is, is it still munging the previous quote?

As somebody who has built web content management applications that do the round trip text thing from scratch in the (distant) past, I can say that often there are slight differences in what happens in the two different directions, which is more likely to manifest in problems the more times a content managed web page (SMF is a content management system) is edited.

That's probably the problem. I often will edit a post four or five times right after its posted, and I use ad blockers, which attempt to block content from some sites that annoy me, they don't usually cause problems. Also, and this is likely part of the problem,  I don't use the preview like I should, not because I don't want to, just because I forget to.

But its not intentional. So I'll work on it. I promise.

One thing. Having turned off the WYSIWYG editor now the rendering is slightly different. Now I see the colored box, and don't see what it appears was broken indentation.
....

I'll look for a good concise guide to basic, minimal BBcode and use it. I like clear clean text.

I have other browsers that have no extensions whatsoever loaded on them, I can look at my posts in them.

Are you using the WYSIWYG editor?

(To turn it off, go to Profile, Look and Layout, "Show WYSIWYG editor on post page by default".)

Tim
« Last Edit: September 23, 2017, 07:36:03 pm by cdev »
"What the large print giveth, the small print taketh away."
 

Offline tooki

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Re: Recyling scrap Ferrites?
« Reply #31 on: September 24, 2017, 05:53:12 pm »
Are you using the WYSIWYG editor?

(To turn it off, go to Profile, Look and Layout, "Show WYSIWYG editor on post page by default".)

Tim
Tim, you’re a genius! cdev, you’re absolved!

I tested it, and indeed the WYSIWYG editor produces the mangled code. (What the heck is the use of a WYSIWYG editor that doesn’t produce usable output?  :palm: )

I was but I turned it off. I have no problem with using "bbcode" when I need to add a link or something, simple works for me. My question is, is it still munging the previous quote?

Are you using the WYSIWYG editor?

(To turn it off, go to Profile, Look and Layout, "Show WYSIWYG editor on post page by default".)

Tim
Your quote looks correct now. It’s up to you whether to add your reply above or below the quoted text, but the convention on eevblog seems to be below.
 


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