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RF Guru
FT240-77 Ferrite Core Material #77
FT240-77 Ferrite Core Material #77
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€14,00 EUR
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FT240-77 Ferrite Core (Material #77)
The FT240-77 is a large ferrite toroid made from material #77, optimized for low-frequency and LF/MF applications. With excellent performance from 0.1–10 MHz, it is widely used in 160 m and 80 m baluns, low-frequency chokes, and audio/IF transformers.
Specifications
- Material: #77 ferrite mix
- Outer diameter: 61 mm
- Inner diameter: 35 mm
- Thickness: 13 mm
- Weight: ~120 g
- Frequency range: 0.1 MHz – 10 MHz
Typical Applications
- Baluns and ununs for 160 m and 80 m antennas
- Common-mode chokes for low HF and MF bands
- Audio and IF transformers
- Power line and EMC suppression in the LF/MF spectrum
Mix 77 provides very high permeability for LF/MF work but is less effective above ~10 MHz. For higher HF use, Mix 31 or 43 is recommended.
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