2 element 21MHz LFA-Q Quad Beam (1m)
Description
A 2 element 21MHz LFA-Q Quad-style beam antenna - Second Generation LFA Yagi !
The G0KSC LFA-Q beam antenna provides a new slant on the proven quad style beam antenna. The LFA-Q is a super-strong, super-rigid Quad which provides very high levels of gain for it's size, while at the same time maximising all round performance. Hard to beat with a direct 50 Ohm feedpoint and no matching losses and suppression of unwanted noise due to the closed loop system.
The LFA-Q deploys 2 x 1.25'' square booms one at the top of the structure and one at the bottom which enable the antenna to be ultra-rigid and stand up to extreme weather conditions such as severe ice and wind loading. Main element tubing is 7/8" to 3/4" to 5/8" to 1/2" with 3/8" loop end sections.
This 2 element LFA-Q is an excellent option if you do not have space, especially stacked !! 2 at just 8m spacing provides 15.49dBi (when placed 10m above ground)!!
Single antenna performance at 15m up (including ground gain) 10.54dBi from a boom of just 1m!
NOTE: With all our HF antennas we can custom design your element taper and element size requirements in order to cater for all weather and installation requirements.
Performance
Gain: 6.95dBi @ 21.15MHz
F/B: 19.85dB @ 21.15MHz
Peak Gain: 6.98dBi
Gain at 15m above Ground: 12.4dBi
Peak F/B: 20.01dB
Power Rating: 15kw+
SWR: Below 1.5:1 from 21.00MHz to 21.30MHz or any 300KHz section of the band
Stacking Distance: 9-12m ( 10m recommended)
2 Stacked Gain @ 8m spacing: 10.54dBi
2 Stacked F/B: 16.97dBi
2 Stacked Gain @ 8m Spacing 15m above ground: 15.6dBi
Boom Length: 1.0m
Longest element: 5.74m
Loop Height: 2.1m
Weight: 7.3KG / 16LB
Turning Radius: 2.91m / 9.6ft
Wind Loading: 0.3 Square Metres
Wind Survival:176KPH / 110MPH
Other options available if higher wind loading/survival is required.
Customer comment on the LFA-Q:
''Very nice...assembled and installed over the last two days - even though it arrived over night!
Performs extremely well - It replaced a MET 144 8T