17 element 144MHz LFA Yagi

A Very Low Noise Yagi for serious DX and EME applications

Improved Performance

If you are looking for serious weak signal work on the bottom of the 2m band. The LFA Yagi has been specifically designed to ensure the lowest levels of unwanted noise are received. The compliment of a tight, highly suppressed pattern and closed loop fed system ensure everything from rain static to man-made noise are heavily reduced.

Multiband, Performance-Busting Design

The LFA is especially effective for EME where very low noise antennas are required and many hours development have been spent ensuring the highest levels of performance have been achieved in an antenna that is not affected by wet weather conditions. As a single, double and 4 stack system, the LFA Yagi is the one to have.

The antennas are constructed with the best quality materials in order that the best mechanical construction can be achieved, even a digital caliper is used (with an accuracy of .01mm) to measure the elements during production to ensure they are within 0.2mm of what they should be.

This antenna has all parasitic elements made from 1/4inch aluminium rod. The LFA loop is constructed from 4 pieces of aluminium tube. The sections in-line with the parasitic elements are 1/2inch while the end sections of the loop are 3/8inch allowing the user to adjust the loop for best SWR. All elements are fully insulated from the boom held in place by high quality UV resistant, RF neutral insulators which in-turn are held to the boom via stainless steel fixings and fittings. The boom is 1.75inch square (45mm) with 2mm wall thickness tapering to 35mm. A boom guy system is supplied with this antenna.If you want an antenna to last and perform in all weathers without SWR or bandwidth shifting, this is it.

Technical Specification:

• Gain: 17.52dBi @ 144.100MHz
• Gain: 17.53dBi @ 144.300MHz
• F/B: 35.37dB @ 144.100MHz
• F/B: 37.92dB @ 144.300MHz
• Peak Gain: 17.55dBi
• Gain at 10m above ground: 23.40dBi
• Peak F/B: 38.22dB
• Power Rating: 3kw
• Balun Required: Yes, Choke/1:1 balun
• SWR: Below 1.1:1 from 143.800MHz to 144.800MHz
• Boom Length: 11.834m
• Weight: 11.05Kg / 24.36LB
• Turning Radius: 6.299m / 20.66ft
• Wind Loading: 0.29 Square Metres / 3.13 Square feet
• Stacking Distance Vertically: 3.95-4.61m (best trade-off 4.4m)
• Stacking Distance Horizontally: 4.13-4.82m (best trade-off 4.6m)
• Following figures calculated at 144.300MHz
• 2 Stacked Vertically @ 4.2m Gain: 20.38dBi
• 2 Stacked Vertically @ 4.4m Gain: 20.44dBi
• 2 Stacked Vertically @ 4.2m F/B: 39.25dB
• 2 Stacked Vertically @ 4.4m F/B: 39.66dB
• 2 Stacked Horizontally @ 4.5m Gain: 20.41dBi
• 2 Stacked Horizontally @ 4.5m F/B: 38.16dB
• 2 Stacked Horizontally @ 4.6m Gain: 20.44dBi
• 2 Stacked Horizontally @ 4.6m F/B: 38.33dB
• 4 Antennas 4.2m V x 4.4m H Gain: 23.27dBi
• 4 Antennas 4.5m V x 4.6m H Gain: 23.41dBi
• Sky Temperature: 211.7 Kelvin @ 144.100MHz
• G/T Figure: +0.12dB @ 144.100MHz