WiMo

WY-208 Yagi 144 MHz, 8el, 1200W

WY-208 Yagi 144 MHz, 8el, 1200W

WiMo
€117.50
incl. VAT plus shipping €98.74
EU VAT reform as of 01.07.2021: X

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SKU: 18100.08HP
In stock, shipped in 1 to 2 days.

Classic VHF Yagi according to DK7ZB, max. 1200W transmit power.


The WY-2xx antennas from WiMo are proven Yagi antennas for the 2m VHF band, used by many contest and DX stations for many years. The mechanical construction is a good compromise between robustness and low weight.


The 8-element VHF Yagi has an improved forward/backward ratio and is therefore and due to the short design (max. length 380cm) still well suited for azimuth/elevation systems, e.g. for EME or Meteorscatter.


Features of the WiMo Yagis

  • Highest possible gain
    with high bandwidth and good side lobe and return loss. Thus, the antennas are oriented towards the demands of serious VHF amateurs who need a powerful antenna for long-distance traffic and all operating modes. The design principles of the Yagis were worked out with computer programmes calibrated at NEC and verified by many test setups.
  • Current-optimised design
    Within a yagi structure, the aim is to achieve uniform element currents from the centre of the exciter to the end of the antenna that do not fall too sharply. The yagis were designed for an optimal current profile. In older designs, there are jumps in the current assignment of the elements, resulting in less than fully utilised gain and poorer side lobe and return loss.
  • Minimum number of elements
    Other Yagis of comparable length have 2-3 elements more and thus more losses. Note: Antenna gain depends first on the antenna length, not on the number of elements!
  • Broadband elements
    Only highly conductive aluminium tubes with a diameter of 8 mm are used for the elements. This represents the best compromise between minimum losses and the resulting wind load. Thin steel elements cause considerable additional ohmic losses and the skin effect, which is already very effective with VHF. Yagis with such elements give away more than 0.5 dB gain due to poor conductivity!
  • Defined element mounting
    Long-term stability with UV-resistant polyamide clips. This means that there is no change in the electrical data even after years. If the elements were fixed directly to the boom by metal clips, oxidation could gradually change the effective element lengths and thus the antenna data over time!
  • Encapsulated dipole baluns
    The dipoles are real folded dipoles with Teflon baluns in the dipole box. So no forced matching with the well-known cladding wave problems! The 2m antennas are also connected via an N-socket. The dipole boxes are absolutely weatherproof, cold-welded and additionally foamed. The Teflon balun is completely inside the dipole boxes. There is no balun loop that protrudes from the junction boxes into the antenna and is then usually attached to the antenna more or less well with adhesive tape! As a result, there are also no leakage problems at the twice-passage of the balun loop through the dipole box.
  • Robust construction
    Except for the mast clamp itself, only screws, nuts and washers made of stainless steel (V2A) are used to ensure a long service life of the antennas. The element holders are made of UV-resistant polyamide, in the case of the cross yagis with round tube boom they are made of aluminium.
  • German manual
    The manual contains all the technical data and also information on staking and interconnecting several identical antennas.
Technical Data
Frequency Range 144-148 MHz
Boom length [cm] 380 cm
Supported Bands 2m
Gain 144 MHz [dBi] 13.5
Max. Power [W] 1200 W
Documentation Languages DE
EN
Design of antenna Yagi
Mono-/Multiband Monoband
Antenna Type Directional Antenna
Balun Included Yes
Half Power Beam Width (3dB) Horizontal 36
Half Power Beam Width (3dB) Vertical 40
Stacking Distance horizontal (cm) 316 cm
Front/Back Ratio 145 MHz (dB) 24
Stacking Distance vertical (cm) 292 - 304 cm
Polarisation Horizontal
Number of Elements 8
Number of connectors 1
Antenna Guying No
Antenna mount Center Mount
Weight [kg] 3.00 kgs

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