I tried some microwave experiments years ago. I converted the microwave tube to full wave operation. Experiments were done with a high voltage needle point in the microwave field and a high current arc in a microwave field. A persistent arc was look for. No anomalous energy was detected. No ball of lighting was produced.
http://www.angelfire.com/scifi2/zpt/chapter2.html#Pg4 Frank Znidarsic I revised my book and sent copies of it to the Niels Bohr institute. Nothing was heard from nobody. This effort fell on deaf ears.