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AD-448
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AD-448

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AD-448 - is the new full-size antenna for 20, 15 and 10 meters bands – advanced development of one of the most popular and successfull designs - AD-335-V2..
AD-448 - antenna for those who wants to be first in the rare DX pileup, loud from any corner of the Earth or confidently go to the contest winning.

It took a lot of time and effort to simulate and optimize the parameters of the antenna, choose the best materials, and test it on the air.

  • 4 elements for 20 m, 4 elements for 15 m and 8 elements for 10 m.
  • Boom length - 10 m.
  • Direction patterns of the AD-448 are clearly expressed on each band.
  • High gain, optimal F/B and F/S ratios.
  • Low SWR in all bands. Full-size elements and a carefully selected optimal distance between them provide a wide band and high efficiency of the antenna.
  • Vibrators are connected by a hard line of pipes. Feeding the antenna - one 50-ohm coaxial cable.
  • Delivery set includes antenna to mast mounting plate with U-bolts and a boom guy with 2 turnbuckles.
  • Shipped in two boxes (2005x220x160mm). Weight is 45 kg.

It is recommended to connect coaxial cable through BALUN 1:1.

AD-448 specification

Parameter/band 20 15 10
Elements qty 4 4 8
Frequency range, MHz 14.000-14.350 21.000-21.450 28.000-29.000
SWR in frequency range 1.3 - 1.05 - 1.3 1.4 - 1.01 - 1.5 1.4 - 1.0 - 1.5
Gain @22м, dBi 14.5 15.1 16.3
Net Gain vs dipole@22m dBd 7.1 7.5 8.5
Front to Back, dB 17 - 20 - 18 18 - 22 - 19
 21 - 25 - 18
Boom lenght, mm 10100
Max element length, mm 10940
Turning radius, mm 7040
Weight, kg 43
Wind surface area, m2 1.14
Max CW input power, kW 5
Max wind speed 35 m/s
Acceptable reduction unit is similar to AlfaSpid RAK, BIG-RAK




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Last Updated: Friday, 19 April 2024 21:17

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