A 10 element Very Low Noise Yagi for serious DX, weak signal and EME applications

This antenna has all parasitic elements made from 1/4inch aluminium rod. The sections in-line with the parasitic elements are 1/2 inch while the end sections of the loop are 3/8 inch allowing the user to adjust the loop for best SWR.

Specification

• Gain: 14.71dBi @ 144.100MHz
• Gain: 14.73dBi @ 144.300MHz
• F/B: 32.20dB @ 144.100MHz
• F/B: 28.73dB @ 144.300MHz
• Peak Gain: 14.76dBi
• Gain at 10m above ground: 20.56dBi
• Peak F/B: 32.54dB
• Power Rating: 3kw
• SWR: Below 1.1.1 from 143.900MHz to 145.200MHz
• Boom Length: 5.254m
• Weight: 3.68kg
• Turning Radius: 2.653m / 8.7ft
• Wind Loading: 0.11 Square Metres / 1.22 Square feet
• Wind Survival: 235KPH / 146MPH
• Stacking Distance Vertically: 2.3-3.4m (best trade-off 3.2m)
• Stacking Distance Horizontally: 2.3-3.5m (best trade-off 3.4m)
• Following figures calculated at 144.300MHz
• 2 Stacked Vertically @ 3.0m Gain: 17.59dBi
• 2 Stacked Vertically @ 3.2m Gain: 17.69dBi
• 2 Stacked Vertically @3.0m F/B: 29.72dB
• 2 Stacked Vertically @3.2m F/B: 29.53dB
• 2 Stacked Horizontally @ 3.15m Gain: 17.55dBi
• 2 Stacked Horizontally @ 3.15m F/B: 28.87dB
• 2 Stacked Horizontally @ 3.4m Gain: 17.65dBi
• 2 Stacked Horizontally @ 3.4m F/B: 29.22dB
• 4 Antennas 3.0m V x 3.15m H Gain: 20.46dBi
• 4 Antennas 3.2m V x 3.4m H Gain: 20.65dBi
• Sky Temperature: 229.6 Kelvin @ 144.100MHz
• G/T Figure: -2.96dB @ 144.100MHz