ON7FU Ferrite Applications

Professionally constructed BALUNs, UNUNs and RF Transformers for amateur radio use

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Toroidal Ferrites for HF

Ferrite from renowned brands.

(Remark: this is not counterfeit material  !  ! )

Only sold per 10 pcs minimum. Please group orders with friends.

Standard, (Material #43) ; 61 mm diameter ring core.

(Known as FT240-43)

  • Outer diameter: 61 mm
  • Inner diameter: 35 mm
  • Thickness: 13 mm
  • Weight: approx. 120 g
  • Frequency range: 3,5 – 50 MHz.

Price: 12 Euro / pce.

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Extra Large, (Material #43) ; 59 mm diameter ring core.

  • Outer diameter: 59 mm
  • Inner diameter: 34 mm
  • Thickness: 20 mm
  • Weight: approx. 185 g
  • Frequency range: 3,5 – 50 MHz.

Price: 15 Euro / pce.

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Low HF , (Material #31) ; 61 mm diameter ring core.

(Known as FT240-31)

  • Outer diameter: 61 mm
  • Inner diameter: 35 mm
  • Thickness: 13 mm
  • Weight: approx. 120 g
  • Frequency range: 1 – 31 MHz.

Price: 15 Euro / pce.

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Remark: Dimensions and weight may vary slightly, depending on brand.

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