Ensure the laminations are insulated (C-5 or similar) to prevent shorts.
Sells individual components and custom-wound units. where to buy transformer laminations
💡 If you only need a few pieces for testing, it is often cheaper to buy a "dead" donor transformer and harvest the laminations than to order a custom small batch. Ensure the laminations are insulated (C-5 or similar)
Search for "Silicon Steel Laminations" or "EI Transformer Core." where to buy transformer laminations