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X7 Cushcraft Big Thunder Series 7-Element Tribander
* Bands: 10, 15, 20m
* Elements: 7
* Power rating: 2kW
* Max gain (dB) 20m: 12.5 @ 14 deg 15m: 13.0 @ 12 deg 10m: 12.9 @ 14 deg
* Front to back ratio: 30dB
* VSWR: 1.1:1 (minimum)
* Bandwidth 1.5:1 kHz 20m: 600 15m: 750 10m: 1700
* No. of elements per band: 3
* Boom length: 5.49m
* Boom diameter: 63.5mm
* Longest element: 11.33m
* Turning radius: 6.09m
* Mast size: 63.5mm
* Wind survival: > 161 km/h
* Wind loading (m2): 0.73
* Windload @ 129km/h: 92kg
* Weight 27.2kg
The X7 Triband yagi has been designed using the latest computer modelling technology to achieve superior electrical and mechanical design. The antenna with its superior mechanical design has a wind survival of 161km/h + (100mph). Traps have been eliminated from the high current elements and reflectors using the new 4L Log Cell design and gives virtual monoband performance. Traps are only employed in the lower directors. The X740 add-on kit is available for 40m.
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