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Original poster: Teslamad@xxxxxxx

I've been coiling for years now and im about to complete my latest coil. This coil was built for research purposes. It runs off a 14,400 10KVA X-former, but unfortunately before it will be operational, it needs a toroid. I have tried building it MANY times from Home Depot ducting with unsuccessful (expensive) results!!! The ducting used by other coilers appears more ridged than mine... hmm... Could you please tell me where to get this other material or how to handle the ducting (dentable and fragile) I've been getting from home depot? Also, one other thing, where do you purchase heavy duty switches for control panels and how much are they (240v 50A)???