Canvey Island, Essex, England Justin@g0ksc.co.uk
VM - Featured products
Twin boom quad
144MHz LFA Yagis
144MHz LFA Yagis

Low Noise LFA Yagis designed by G0KSC free to build for personal use.

144MHz LFA Yagis
70cms LFA Yagis
70cms LFA Yagis
Twin-Boom G0KSC Quads
G0KSC Twin-Boom Quads
Twin-Boom G0KSC Quads
G0KSC Custom Dish feeds - Above installation @ HB9Q
Custom low-noise dish feeds
Custom low-noise dish feeds
G0KSC Custom Dish Feeds

Above installation @ HB9Q

G0KSC Custom Dish feeds - Above installation @ HB9Q
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Low Noise LFA Yagis, there really is a difference!

Normally I like to write something of length but this time, I will let the real world results do the talking. Below is a link to a video created by Jarek, VA3NCD who compares his 7el 50MHz G0KSC LFA with a well-know, commonly used, US built equivalent. 

First Jarek simply switches between the antenna with just background noise only. Move forward 4 minutes in the video and Jarek points his beams at different beacons and conducts the A/B tests. Note how marked the audible difference is in noise this is 'many' DB's difference in noise floor and as you can see from the beacon tests, makes a difference between Q5 reception and not being able to copy a beacon at all.

Many antenna designers display antenna comparison plots against my antennas showing the similar patterns. However, the LFA is not a spot-frequency antenna and performance difference is not attributed to pattern alone. The LFA is a wide band antenna in terms of performance AND SWR. Many antenna vary greatly in side lobes, F/B and gain over a short frequency range and thus, the LFA has predictable performance everywhere. Next, the low noise characteristic is not a result of pattern alone, the closed loop driven element adds to this characteristic and reduces the noise floor and has a direct, 50Ohm feed point so any matching losses (whcih includes additional noise) are not added to the antenna after model.

Have a good look through this video and see the facts in the real world!

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