Em 25/11/2018 23:46, Ed escreveu:This may be useful: http://www.coe.ufrj.br/~acmq/the_capacitance_of_a_wire.pdf Considering the length of the rod as 43.28 meters with a radius of 7.6 cm the formula gives 342 pF.
It's been many years since I went through the calculations btut I think that the magnifier connected to the ground and antenna would have tuned to an awkwardly low frequency and would have been inoperable. Antonio de Q would know for sure.Ed Phillips On 11/25/2018 3:19 PM, Daniel Kunkel wrote:Bill, As far as Tesla was concerned, the 142 foot mast was functional. It was not an antenna. It was a scientific test to measure capacitance. As you pointed out, it was made of iron, so its not ideal for RF or electrical work. He did several tests and came up with different capacitance on November 5,6,7th. The final measurement came in at 342 picofarads.So all one would have to do make it functional (aka achieve resonance) isto tune the tank circuit, just like we are already doing on any normal coil today.~Dan
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