Re: calculating copper plate indutance (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- 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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