Neon Sign Transformer High Voltage Power Supply

I remove the Secondary Circuit Ground Fault Protection (SCGFP) as well as the center tap of a neon sign transformer (NST) in order to use it as a high voltage DC power supply for my Farnsworth fusor. The SCGFP will not allow the fusor shell to be grounded without it cutting power to the primary coil, so the circuit is removed. The center tap only allows half the rated voltage of the transformer while the fusor shell is both grounded and rectified to DC current, so this feature is also removed. The unit is then placed under transformer oil for electrical isolation as well as improved heat dissipation .

Special thanks to Fusor.net and specifically Richard Hull for information regarding the function and limitations of NSTs as well as their wiring with relation to a fusor setup.
Thank you also to ‪@glasslinger‬ for providing your wonderfully detailed video demonstrating the procedure for NST disassembly, and subsequent electrical isolation for high voltage transformers.

Contents:
00:00 - Intro
00:40 - Disassembly and wiring
06:47 - Testing
07:59 - Melting tar and inspection
10:30 - Cleanup and further disassembly
13:46 - Insulation and reassembly
17:25 - Enclosure build
20:37 - Adding transformer oil
22:53 - Power supply explanation
23:53 - Demo