ON7FU Ferrite Applications

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

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    • “Why do I need a kilowatt + rated BALUN; ……. I’m never running more than 200 Watts”.
    • Correct use of ON7FU ANTENNA TUNER BALUNs.
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    • BALUN: What it is and what it’s supposed to do.
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    • Polycarbonate enclosures
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  • GALLERY
  • BALUNs
    • Standard 1/1 BALUN
    • Lightweight Medium Power 1/1 BALUN
    • High Power 4/1 BALUN
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  • 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
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    • 75 to 50 Ohms Transformer.
  • FERRITE products
    • Toroidal Ferrites for HF
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  • Miscellaneous
    • Customization
    • Teflon Coaxial Cable.

Polycarbonate enclosures

Polycarbonate enclosures for ON7FU products.         

Since the beginning of 2015, ON7FU BALUNs and Line Isolators are built in polycarbonate material housings.

Polycarbonate has a number of interesting properties, making it more suitable for outdoor use than the popular ABS material used before.

Polycarbonate is an amorfic thermoplastic  product, that, because of its excellent heat resistant and physical properties makes it very a very suitable material for rugged enclosures. It is resistant to highly fluctuating temperatures  and it’s good electrical properties remain unaffected by moisture. Polycarbonate is self extinguishing , resistant to several chemical agents and has a good UV resistance;  additional external coating is not required.

The enclosures used by ON7FU are designed to comply with different international recognized standards.

They withstands several years of exposure to rough climatic circumstances, as needed when deployed outdoor, installed at an antenna.

Moreover, they are tamper proof, which ensures they don’t break when falling or bumping against objects under windy weather.

Initially they are IP66 complying, and with the additional internal coating and potting, an end product of class IP68 is obtained.

Can we do even better?   …. “Everything can be done better”…..

Since 2017, on request, at a small additional price, ON7FU products can be built in a super professional housing.

Apart from the excellent properties of the polycarbonate base material, these new enclosures are additionally tested and individually certified by recognized test agencies. (e.g. UL Listed).

They comply in a documented way with the most stringent standards for use in harsh industrial environments. (UL 508A)

This ensures a long lifetime under the most severe weather conditions.

Also the mechanical shape is special. Edges and corners are additionally rounded and the bottom is provided with extra flanges, facilitating universal fixation.

The currently used enclosures are IP67 by themselves and are enhanced to IP68 by internal resin coating/potting.

These enclosures are virtually indestructible.

They are intended for those who want the best of the best.

 

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