ON7FU Ferrite Applications

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

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    • About Us
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    • General Conditions for Safe Use of ON7FU products.
    • Product Regulatory Compliance.
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    • Disclaimers.
  • Tech. Info
    • Proof of Performance / Measurement Results
    • Power Specifications: ICAS versus CCS.
    • “Why do I need a kilowatt + rated BALUN; ……. I’m never running more than 200 Watts”.
    • Correct use of ON7FU ANTENNA TUNER BALUNs.
    • Reducing RF Noise in the radio environment
    • Mounting Flanged Enclosure on Boom, Mast or Support Tube
    • BALUN: What it is and what it’s supposed to do.
    • Scenarios
    • To keep in mind.
    • Optimum Common-Mode RF Current and Noise Elimination.
    • Polycarbonate enclosures
    • Links to interesting publications.
  • Contact / Order
    • Contact / Order
  • GALLERY
  • BALUNs
    • Standard 1/1 BALUN
    • Lightweight Medium Power 1/1 BALUN
    • High Power 4/1 BALUN
    • Antenna Tuner BALUN
  • UNUNs
    • High Power 9/1 UNUN
    • High Power 4/1 UNUN
    • High Power 1/2 UNUN
  • Line Isolators
    • High Power Range Optimized Coaxial Line Isolator
    • Wideband Coaxial Line Isolator
    • Balanced Line Isolator.
    • HexBeam “BALUN”
  • RX Antenna Products
    • RX Antenna Matching Transformers
    • RX Antenna Termination Resistors
    • 75 to 50 Ohms Transformer.
  • FERRITE products
    • Toroidal Ferrites for HF
    • Ferrite Sleeves for VHF
  • Miscellaneous
    • Customization
    • Teflon Coaxial Cable.

Proof of Performance / Measurement Results

A customer can ask for personalized measurement results (Vector Network Analyser plots) of the products ordered.

These are provided for free, when requested at the time of the order.

What can you expect:

A graph showing the VSWR as a function of frequency. This is a very flat curve, at low VSWR values, over the entire specified frequency range (and beyond).

A graph showing the magnitude of the Common-Mode impedance. This is a a smooth curve at high impedance values (typically above 3 kiloohm minimum at the edge frequencies) free of sharp constructional resonances that could cause abrupt phase jumps.

A graph showing the common mode rejection, as measured in a 50 Ohms environment. This curve will show values of – 30 dB or better over the specified frequency range.

A grah showing the insertion loss as a function of frequency. This curve shows extremely low loss values over the entire specified frequency range (and beyond).

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