Original poster: Just Justin <rocketfuel@xxxxxxxxxxxxx> Greetings, I know that I'll likely need an inductive ballast at some point in the future. I'd like to keep my eyes open for a nice core that I can salvage for that purpose. Are there any known semi-common sources for EI, C, or toroid cores that are large enough for coil use? (5KVA or so) Thanks! Justin in Austin