This is a view of the pressure cooker lid after machining the holes to mount the NST high voltage bushings, the low
voltage terminal block, and the toggle switch.
Some pictures of an old pressure cooker tank used to house an unpotted 15KV 60mA Franceformer under oil. Some pictures are missing of course, as I only got 26 prints from a 36 exposure roll. Missing are pictures of the pressure cooker before anything was done, of the filter network parts that were originally installed in the tank with the transformer, but later removed, and some pictures of the safety module originally in the NST as supplied new from the manufacturer.
This is a view of the pressure cooker lid after machining the holes to mount the NST high voltage bushings, the low
voltage terminal block, and the toggle switch.
Underside view of the lid after machining.
Top view of the lid with the NST parts and toggle switch installed.
Underside view with parts installed.
The transformer itself mounted to the lid by support straps.
View of the completed assembly.
Top view of the completed assembly showing the safety gaps, grounding lug, and the markings for the toggle switch. As the NST has two separate primary windings, I installed a toggle switch to select between 120V (parallel) or 240V (series) operation.
This is a picture of the secondary ground fault
module from the NST. Operation of this module must be defeated to use the NST for Tesla coil purposes.
Wiring diagram of switch used to select 240 or 120 Volt operation. 120V position shown.
Testing the completed repotted NST with a Jacobs
ladder.