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DiY 12" long by 1 1/3" diam. LARGE FERRiTE ROD using 3 sizes of FERRiTE CABLE COREs stacked together

12 AC Rough 19

ffxiii-2 Humans vs Valfodr70

HF welding / RF welding machine GGP

DIY 60 watt high power audio transformer using a FERRITE ROD primary & 2 FERRITE BOBBIN CORE 2ndary

High Frequency Welding of Tube Mill, Steel Pipe Welding Machine