On 10/07/2010 13:02, Olin Lathrop wrote:
>> Peak currents can be as high as 2100A.
>>
>> 2uH of inductance
> Note that this means the core needs to store 4.4J.  You can play all the
> games you want with turns, wire thickness, core material, etc, but there is
> no way to escape this basic physics.
Absolutely,
2uH isn't an impossible air core inductance. I have an HF manpack with 
variable 1uH to 185uH or so air core inductor for aerial matching. It's 
gold or brass braid over cord wound from a 1" metal spindle to 3" or 4" 
plastic grooved drum. (possibly gold to stop corrosion in damp jungles).

At those kind of currents an air cored toroid shape. At higher frequency 
silvered or varnished polished copper strip or tube works better than 
solid wire. Don't use tinned wire or gold  plated. Both inferior to 
lacquered polished copper or silvered copper for resistance, especially 
sharp pulses/high frequency unless you WANT lower Q and higher losses.
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