Ferrite Tutorials Ferrite Mix Selection Ferrite Cross Reference Ferrite Toroid Tech Specs Ferrite Chatter Noise RF Toroid Calculator by VK3CPU 25:1-81:1 Baluns/Ununs Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/25:1-81:1 Baluns/Ununs Tutorials