High Copper Cost - was: [TCML] Refurbished Coill

[Barton B. Anderson]

Hi Clive,

I wanted to point out that even though I see nothing wrong with Al 
primary's from a look at skin effect, resistance (AC and DC), etc., I 
have not tried it myself. So my ok with it is purely arm chair cowboy. 
I'll try it on the next coil I build for giggles and cost savings.

Something to keep in mind is that there is a 2 awg size difference 
between Al and Cu in general. So, 2 awg sizes larger of Al for 
equivalent conductance properties of copper.

Javatc offers the choice of Al or Cu for coils (if you want to look at 
electrical differences in a coil application). At least the latest 
version does.

Take care,
Bart


Barton B. Anderson wrote:
> Hi Clive,
>
> There was a little study performed not too long ago by Ed Phillips. 
> Look up "FINAL REPORT Cu COIL vs Al COIL" in the archives for the 
> info.  I think they are acceptable in the primary. There is a 
> difference in Q and resistance (but it's not much). Nothing wrong with 
> Al primary's in my book.
>
> Take care,
> Bart