View of the 100 kVA 3,600 r.p.m. synchronous Rotary Spark Gap, as originally designed, to run under nitrogen gas pressure. Note: this design had to be changed, to accommodate heat transfer at high power levels (see text.)
The [proudly] displayed insignia of the Tesla Coil Builder's Association, on the front of the Model 13M 3,600 r.p.m. 10 h.p. synchronous rotary spark gap.
Bill Wysock-N6UXW, shown with the [prototype] 0.16 mfd.@50 KV AC RMS capacitor bank. Note the 3 inch diameter copper ball safety gap and dual 500 MCM connection cables.
Next Model 13M page (Colorado Springs)