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Re: calculating copper plate indutance (fwd)
---------- Forwarded message ----------
Date: Wed, 26 Sep 2007 19:24:09 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: calculating copper plate indutance (fwd)
Hi Chris,
I'm sending you a zip following this email. I have noticed this problem
in the past in all the script type programs. It is certainly a browser
thing. I've noticed it when deleting files or over-writing them. The
only way to get around it is renaming files like with a rev character as
part of the name. Fine for scripts, but not the page itself.
So, anyway, expect the zip file soon.
Take care,
Bart
Tesla list wrote:
>---------- Forwarded message ----------
>Date: Wed, 26 Sep 2007 16:18:13 +0100
>From: Chris Swinson <list@xxxxxxxxxxxxxxxxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: calculating copper plate indutance (fwd)
>
>HI Bart,
>
>The cache is totally clear, when I visit your page it comes up with all the
>related files, I clear the cache again, and refresh the page and still only
>obtains the old files.
>
>I got a mate of mine to check, he sent me the JS and HTML pages, so I can
>see the new page that way. If you could zip the new ones then I can bung it
>on my webpage and use it from there.
>
>I tried the page again today, still the same, I have never seen anything
>like this before. The only thing I could suggest if you delete the related
>pages on your site, then reupload them (not just overwrite). I've had
>websites go a bit strange at times in not updating files. Though why it
>would only effect my pc I have no idea.
>
>All your site files are re-downloaded each visit, and I only get the old
>files, so *SHRUGS* Really do not understand this one..
>
>Strange thing is, I get your updated JAVATC pages fine!
>
>cheers,
>Chris
>
>
>
>----- Original Message -----
>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: <tesla@xxxxxxxxxx>
>Sent: Wednesday, September 26, 2007 2:54 PM
>Subject: Re: calculating copper plate indutance (fwd)
>
>
>
>
>>---------- Forwarded message ----------
>>Date: Tue, 25 Sep 2007 18:05:53 -0700
>>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>>To: Tesla list <tesla@xxxxxxxxxx>
>>Subject: Re: calculating copper plate indutance (fwd)
>>
>>Hi Chris,
>>
>>Man, that is odd. No, just one server for classictesla. Classictesla is
>>on the Nebula server of LunarPages. I don't test with Opera. I tried it
>>early in Opera's infancy but didn't like how the document objects were
>>handled as far as passing data to and from.
>>
>>You may want to give Firefox a try. Firefox has come a long way these
>>days and I use it almost exclusively now. I'm curious if you cleared the
>>cache in IE6 while still on the flat ribbon calc page? If so, that might
>>explain it as it will at least have to store the page that is open
>>regardless. If your seeing no ohms box, then you are looking at a web
>>page that is no longer on the server, so it must be cached on your pc as
>>that's the only way you would be able to even bring it up.
>>
>>There should be 4 output boxes. The bottom is labeled "Winding
>>Resitance" and it's unit is the Omega symbol with "m" in front of the
>>symbol for milliohms (just in the event your still looking for the word
>>"ohm").
>>
>>If you can't figure out the problem, let me know and I'll just send you
>>the files offline.
>>
>>Take care,
>>Bart
>>
>>Tesla list wrote:
>>
>>
>>
>>>---------- Forwarded message ----------
>>>Date: Tue, 25 Sep 2007 11:07:22 +0100
>>>From: Chris Swinson <list@xxxxxxxxxxxxxxxxxxxxxxxxx>
>>>To: Tesla list <tesla@xxxxxxxxxx>
>>>Subject: Re: calculating copper plate indutance (fwd)
>>>
>>>Hi Bart,
>>>
>>>I asked a mate of mine to try it and he says it works, I've tried IE6, IE7
>>>and even tried opera, and still no ohms box.
>>>
>>>I've deleted the IE cache clean, I've never visisted classictesla in opera
>>>so everything is new in there. Still, this one has got me stumpted.
>>>
>>>Looking at the HTML code, there is no box there for the ohms bit, looking
>>>at
>>>the JS file, nothing in there either.
>>>
>>>I wonder if your website is held on a few servers or something, and the
>>>server I happen to be trying has not caught up yet ? the only thing I can
>>>think of :S
>>>
>>>Chris
>>>
>>>
>>>
>>>
>>>----- Original Message -----
>>>From: "Tesla list" <tesla@xxxxxxxxxx>
>>>To: <tesla@xxxxxxxxxx>
>>>Sent: Tuesday, September 25, 2007 2:35 AM
>>>Subject: Re: calculating copper plate indutance (fwd)
>>>
>>>
>>>
>>>
>>>
>>>
>>>>---------- Forwarded message ----------
>>>>Date: Mon, 24 Sep 2007 17:48:28 -0700
>>>>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>>>>To: Tesla list <tesla@xxxxxxxxxx>
>>>>Subject: Re: calculating copper plate indutance (fwd)
>>>>
>>>>Hi Chris,
>>>>
>>>>It's working just fine for me. I think your browser is using the old
>>>>cache script. Hold the shift key down and click on Reload in your
>>>>browser after the page comes up. This should clear the cache and reload
>>>>the new script. If still nothing, then go to your browser preferences
>>>>and clear the cache and stored web pages there.
>>>>
>>>>I've checked it in both IE6 and Firefox and both work fine. BTW, the
>>>>value is milliohms.
>>>>
>>>>This is something that occurs with the other javascript pages as well.
>>>>There is a way to get rid of it (applying a rev to the script name), but
>>>>I've yet to implement that. I might do that on the next go around. BTW,
>>>>Netzero and similar dialup utilities are horrible for storing old stuff
>>>>and not loading the new stuff.
>>>>
>>>>Take care,
>>>>Bart
>>>>
>>>>Tesla list wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>---------- Forwarded message ----------
>>>>>Date: Sun, 23 Sep 2007 19:24:42 +0100
>>>>>From: Chris Swinson <list@xxxxxxxxxxxxxxxxxxxxxxxxx>
>>>>>To: Tesla list <tesla@xxxxxxxxxx>
>>>>>Subject: Re: calculating copper plate indutance (fwd)
>>>>>
>>>>>Hi Bart,
>>>>>
>>>>>No, there is nothing in the box whatsoever not even a zero. I did try
>>>>>100
>>>>>turns and still nothing.
>>>>>
>>>>>The resistances are less than 10 milliohms I would imagine. I am only
>>>>>using
>>>>>a single turn of thick sheet so it should work out like 1 milliohm..
>>>>>
>>>>>Cheers,
>>>>>Chris
>>>>>
>>>>>
>>>>>
>>>>>----- Original Message -----
>>>>>From: "Tesla list" <tesla@xxxxxxxxxx>
>>>>>To: <tesla@xxxxxxxxxx>
>>>>>Sent: Sunday, September 23, 2007 7:03 PM
>>>>>Subject: Re: calculating copper plate indutance (fwd)
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>---------- Forwarded message ----------
>>>>>>Date: Sun, 23 Sep 2007 10:40:01 -0700
>>>>>>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>>>>>>To: Tesla list <tesla@xxxxxxxxxx>
>>>>>>Subject: Re: calculating copper plate indutance (fwd)
>>>>>>
>>>>>>Hi Chris,
>>>>>>
>>>>>>Let me guess; you are seeing 0 in the resistance box? Ok, this is
>>>>>>exactly why I said more precision past 3 decimal places. Just change
>>>>>>your turns to like 100 and see what happens.
>>>>>>
>>>>>>I can always change the output to milliohms as this might make more
>>>>>>sense for flat ribbon primary's. I should have done that from the
>>>>>>start.
>>>>>>Ok, I'm off to do that. Should only take me a couple minutes.
>>>>>>
>>>>>>Take care,
>>>>>>Bart
>>>>>>
>>>>>>Tesla list wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>---------- Forwarded message ----------
>>>>>>>Date: Sun, 23 Sep 2007 16:01:09 +0100
>>>>>>>From: Chris Swinson <list@xxxxxxxxxxxxxxxxxxxxxxxxx>
>>>>>>>To: Tesla list <tesla@xxxxxxxxxx>
>>>>>>>Subject: Re: calculating copper plate indutance (fwd)
>>>>>>>
>>>>>>>Hi Bart,
>>>>>>>
>>>>>>>Thanks for taking the time to add it in!
>>>>>>>
>>>>>>>I can't get anything to come up in the resistance box though ?
>>>>>>>
>>>>>>>Cheers,
>>>>>>>Chris
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>Hi Chris,
>>>>>>>>
>>>>>>>>I added copper ribbon resistance to the output as requested.
>>>>>>>>http://www.classictesla.com/java/flatribbon/flatribbon.html
>>>>>>>>
>>>>>>>>I've got it set to 3 decimal places. If your looking for more
>>>>>>>>precision
>>>>>>>>for small turns, you can always calculate it.
>>>>>>>>R=pL/A where p is resistivity of material, L is the length, and A is
>>>>>>>>the
>>>>>>>>cross sectional area.
>>>>>>>>
>>>>>>>>So, A = thickness x height
>>>>>>>>L = Length of winding
>>>>>>>>p = 0.000001678 ohms/cm (the number I'm using anyway)
>>>>>>>>
>>>>>>>>The resistivity of copper varies. This is part of the problem with
>>>>>>>>resistance numbers. There are a lot of copper alloys and even
>>>>>>>>processes
>>>>>>>>can change affect resistivity. Temperature is also a large factor.
>>>>>>>>The
>>>>>>>>output value will assume a temp of 20C (68F) and the common
>>>>>>>>resistivity
>>>>>>>>number shown above.
>>>>>>>>
>>>>>>>>Take care,
>>>>>>>>Bart
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>>Would it be possible to mash the resistance calculation into that
>>>>>>>>>too
>>>>>>>>>,
>>>>>>>>>pretty pleaseeee ;o)
>>>>>>>>>
>>>>>>>>>Chris
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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