Forum Krótkofalarskie PKI

SP4KDK
08.04.2014 22:19:39

QTH: JO94TB PASŁĘK
Posty: 600 #1808776



Antenna: yagi, with 43 horizontal elements: 1 reflector, 1 driven element, 41 directors, suspended and aligned on two strands of Kevlar cord 60 cm apart.

Lenth: 30 meters (reflector to director #41)

Height: 6 to 8.5 meters above ground (ground slopes towards ocean).

Uses taller, non-metallic front support. Antenna is horizontally polarized.

Azimuth Bearing: 62 degrees (centered on Ireland)

Feedpoint Z: 50 ohms, ferrite 5 choke balun

SWR: 1.15

Forward Gain: 23.9 dBd

Front to Back Ratio: 32dB

Front to Side Ratio: 25 dB (270°)

Horizontal Main Lope Width: 15.6° at -3db points

Vertical Main Lobe Thickness: 4.6° at -3db points.
73! de SP4KDK, Adam
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