[TCML] Q,,question

[Barton B. Anderson]

A relatively equivalent value for tubing vs. flat ribbon is the outer 
surface of the tubing. So, for a 2" height ribbon, an equivalent tube 
size would be 2"/pi (about .64" diameter). Ribbon can basically get a 
large surface area into a compacted area. Edge corona, yes.

Take care,
Bart

David Rieben wrote:
> Hi Chris, Gary,
>
> I'm going to have to respectfully disagree with you here, Chris. If 
> you were to split a length of copper tubing length-wise, then you
> would effective double the surface area, since the previously
> unexposed inside of the tubing will now be exposed. However,
> as Gary has stated, you would also add other losses that would 
> more than negate whatever gains that you obtained by doubling the 
> primary coil's effective surface area. And I would hate to even think 
> about TRYING to NEATLY slit a 50 ft. section of copper tubing 
> into a nice smooth ribbon ;^(/ I'm with Gary, I would prefer copper
> tubing/pipe to copper ribon anyway as I find it much easier to work.
>
> David Rieben
>
> -------------- Original message -------------- 
> From: "Chris Swinson" <list at future-technologies.co.uk> 
>
>   
>> ----- Original Message ----- 
>> From: 
>> To: "Tesla Coil Mailing List" 
>> Sent: Wednesday, December 05, 2007 6:29 AM 
>> Subject: Re: [TCML] Q,,question 
>>
>>
>> Sirs, 
>> Would it be better to split a roll of 7/8" copper coil, and roll it 
>> flat? 
>> Seems more area would mean more "skin depth area"??? 
>> Regards 
>> j. 
>> . 
>>
>> The surface area will still be the same. 
>>
>> Chris 
>>
>>
>>
>>
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>>     
>
> You may realize some gain with the larger surface area, but I would expect 
> losses to increase even more because of eddy current losses.  You would also 
> increase losses due to corona off of the sharper edges.
>
> And more significantly, how on earth would you do that, and not have it look 
> like a mess?  You can find copper ribbon on eBay, but even so, I would choose 
> tubing over ribbon.
>
> Regards, Gary Lau
> MA, USA
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