Re: Aluminium Wire (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 28 Sep 2007 09:09:33 EDT
From: FIFTYGUY@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: Aluminium Wire  (fwd)

 
 
In a message dated 9/28/07 8:50:59 A.M. Eastern Daylight Time,  
tesla@xxxxxxxxxx writes:

>As far as toploads and even primary's, no big deal, but as far as a  

>secondary winding aluminum is a poor choice. The issue has to do  with 

>both DC and AC resistances. Both will be near 1.6 times higher for  

>aluminum as compared to using a copper winding. It will work as far  as 

>sparks, resonance, etc.., but it will require that much more power  to 

>achieve the same spark length. Both DC and AC resistance have to do  with 

>the resistivity of the material and are equivalent to the ratio of  the 

>resistivity between the two  materials.


    Couldn't this be crudely (lumped) simulated by  adding a series resistor 
between the bottom of the secondary and the RF ground,  and another between 
the top of the secondary and the topload? Say, 100 ohms each  resistor? Does 
this really have a big effect on spark length?
    It doesn't seem to have much effect on the spark  when a resistance is in 
series off the topload. After all, the model is  something like 220,000 ohms 
per foot of spark through *air*!
 
-Phil LaBudde

 
Center for the Advanced Study of Ballistic  Improbabilities



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