Re: can a tesla coil be tuned to a microwave frequency

 A Tesla Coil can be made to resonate at microwave frequencies, but in 
order to do so it has to be so small that it hardly produces any output. 
The only difference between a very high frequency discharge and a regular 
high frequency discharge (in this case I am comparing KHz with GHz) is 
that the higher the frequency, the more dense the plasma becomes, thus 
while a regular Tesla Coil produces a brushy thin electrical discharge, a 
Diathermy machine outputting microwave frequencies makes a really dense 
single discharge that looks more like a gas flame than a spark. They do 
not have any effects on water; in fact, the electricity does not even run 
over the water since its frequency is so high that skin effect restricts 
it to the very surface of any conductor it flows it.

 You can see more information about Tesla Coils on my personal webpage:
 http://www.powerlabs.org
 Sam Barros.