The completed GPO-2 Tesla Coil.  The height from the ground to the top of the discharge electrode is approximately 9 feet, 4 inches tall.     A test of the GPO-2 coil at less then 50% maximum input power.  This image was taken with a Sony digital camera (not a time exposure).  The equivalent shutter speed is about 1/60th second.     Another image (1/60th second) of the coil at less then 50% input power.  Even at this input level, the arcs seen by the naked eye were almost 6 to 7 feet in length from each corona point.  After the GPO-2 coil is installed at MASM, more spark images will be posted here.