Hey, great find! Those old refinery cores are like sleeping beasts—if you wake them up the wrong way they’ll bolt or melt. First, do a quick check of the coolant system; most of those units run on a proprietary alloy‑hydrogel mixture. If it’s dry, add a low‑viscosity synthetic coolant—something like a fluorocarbon mix with a bit of silica to keep it from freezing. Next, stabilize the magnetic flux. Those rigs used a series of iron‑nickel flux concentrators; if you can align a few spare coils to match the original polarity you’ll damp the oscillations. Finally, run a low‑power diagnostic to map the charge density. Use a handheld oscilloscope set to 50 kHz and look for spikes; trim the high‑frequency noise with a small ferrite choke. If you keep the core temperature under 70 °C and run it in bursts, the rigs should keep humming for a decent while. Good luck, and remember: over‑calibrate the phase, but don’t let the core over‑cool—heat is the lifeblood of a steady power supply.