Re: calculating copper plate indutance (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- 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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