Baluns, Chokes

A sheath wave is a type of electromagnetic wave that spreads in a conductor along the outer sheath of a coaxial line. However, they can also be generated by inducing the actual transmitted signal on the outside of the coaxial sheath. At WiMo, we not only sell a wide range of sheath wave barriers, but we also manufacture them ourselves. Contact us for your individual requirements.



Items 11-20 of 59

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  1. Kelemen Balun 1000W/2000W
    Kelemen Balun 1000W/2000W

    Kelemen balun for 1000W or 2000W and 1:1, 1:2, 1:4, 1:6 or 1:9 to choose from

    In stock, shipped in 1 to 2 days

    As low as: €59.90
    incl. VAT, plus shipping €50.34
  2. Hari Mini-Balun 120W SSB/CW
    Hari Mini-Balun 120W SSB/CW

    Hari toroid balun; 120W SSB/CW; 1:1, 1:2, 1:4 and 1:6 to choose from

    In stock, shipped in 1 to 2 days

    As low as: €38.00
    incl. VAT, plus shipping €31.93
  3. Hari Balun 200W/1000W SSB/CW
    Hari Balun 200W/1000W SSB/CW

    Hari toroid balun SSB/CW, 200W/1000W and 1:1, 1:2, 1:4 and 1:6 transmission ratio to choose from

    In stock, shipped in 1 to 2 days

    As low as: €42.00
    incl. VAT, plus shipping €35.29
  4. CG Antenna Balun 100W SSB/CW
    CG Antenna Balun 100W SSB/CW

    CG-Antenna Balun for 80m-10m, max 100W (CW or SSB). 1:1, 1:4 and 1:9 to choose from

    In stock, shipped in 1 to 2 days

    As low as: €29.00
    incl. VAT, plus shipping €24.37
  5. Balun 1:49 - 600 Watt
    Balun 1:49 - 600 Watt

    Powerful balun 1:49 for end-fed half-wave antennas (EFHW), max. 600 W PEP

    In stock, shipped in 1 to 2 days

    €109.00
    incl. VAT, plus shipping €91.60
    SKU 11365.49
  6. EAntenna Choke, 1:1, 3 kW
    EAntenna Choke, 1:1, 3 kW

    Robust balun, transmission ratio 1:1 (choke, MWS)

    In stock, shipped in 1 to 2 days

    €69.00
    incl. VAT, plus shipping €57.98
    SKU 11369.CHOKE
  7. InnovAntennas Current Balun (Choke) 1-80 MHz  3kW
    InnovAntennas Current Balun (Choke) 1-80 MHz 3kW

    Wideband balun, waterproof, with screw terminals and PL socket

    In stock, shipped in 1 to 2 days

    €69.00
    incl. VAT, plus shipping €57.98
    SKU 18484.0503

Items 11-20 of 59

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FAQ

Why 1 1 balun?
A 1:1 balun is used in amateur radio to connect a balanced antenna, such as a dipole antenna, to an unbalanced coaxial cable. The balun transforms the impedance balance (symmetrical to unbalanced) and prevents HF (radio frequency) currents from flowing on the outside of the coaxial cable, which can lead to unwanted radiation and potential interference in your own or third-party devices. Furthermore, the balun ensures a better match of the antenna impedance to that of the cable, which leads to more efficient signal transmission and reduced SWR (standing wave ratio) values.
Carsten Esch
When do I need a sheathing wave blocker?
You need a sheath wave barrier, also known as a balun or ferrite core, in amateur radio to prevent unwanted sheath waves that can flow along the outer conductor of your coaxial cable. These waves can cause interference by propagating back down the cable to the transmitter, distorting the antenna pattern or causing unwanted emissions. A standing wave barrier becomes particularly important when: 1. You are operating an asymmetrical antenna system, such as an end-fed or vertical antenna, where the currents on the coaxial cable shield and the antenna do not balance and sheath waves are more likely. 2. You notice RF problems in your own or neighboring electronic devices, which indicates that the RF signal is being returned through the cable. 3. You are working on multi-band antennas where the harmonics of one band frequency can cause interference on another band. By using a standing wave barrier, these problems can be minimized and the performance of the antenna can be optimized as well as electromagnetic interference can be reduced.
Carsten Esch
What does a balun do?
A balun, short for balanced to unbalanced, is a transformer used to match a balanced antenna, such as a dipole antenna, to an unbalanced feedline, such as a coaxial cable. The balun ensures that the impedance of the antenna and the coaxial cable match and also minimizes the transmission of RF interference to the cable. This efficiently prevents the cable itself from acting as an antenna and changing the radiation pattern of the actual antenna or emitting unwanted radiation. Baluns are critical to the optimal performance of many types of antennas in amateur radio.
Carsten Esch