The FT240-43 Ferrite Toroid Core is a powerful solution for suppressing electromagnetic interference (EMI) and radio frequency interference (RFI) in the 25 MHz to 100 MHz range. Made from mix 43 material, it is specifically designed for mid-frequency RF applications, where interference is common in devices like ham radio setups, coaxial antennas, baluns, power supplies, and audio systems.
Whether you're building your own common-mode choke, antenna filter, or looking to reduce conducted EMI in your DIY project, this toroidal core delivers consistent results. The large inner diameter (1.4") makes it easy to wrap multiple wire turns or accommodate thick cable, making it perfect for enthusiasts and professionals alike.
Typical Applications:
Ham Radio Antenna Feedline RF Chokes
DIY Power Supplies and Inverters
EMI Filtering for Coax Cables and Signal Lines
Noise Reduction in Audio Equipment
Electronic Bench Projects & Prototyping
FT240-43 is trusted by engineers, ham operators, and makers across the U.S. for its balance of size, performance, and mid-frequency filtering efficiency.