OB4-40 4 Element 40m duo driven Monoband-Yagi | OptiBeam

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OB4-40 4 Element 40m duo driven Monoband-Yagi

OPTIBEAM OB4-40 4 Element 40m duo driven Monoband-Yagi

The best 4 element 40m duodriven monoband-Yagi of the world:

The OptiBeam high Q air coil reduces the length of the elements nearly lossfree down to clearly below convenient 15 meters.

complete coverage of the 300 kHz with best SWR, constant gain and stable radiation pattern.

Due to the especially developed „40m decoupling stubs“ interaction is avoided to other Yagis in the frequency range of 14 to 30 MHz.

OB4-40		4 Element Yagi 40m

Bands		40
Gain (dBd) *		5
Gain (dBi) **		11.9
F/B (dB)		25
VSWR
7,00 - 7,06 - 7,10 - 7,15 - 7,20 - 7,30		1,5 - 1,1 - 1,2 - 1,2 - 1,1 - 1,3

Elements (number)		4
Max. Elementlenght (m)		14.74
Boomlenght (m)		11.9
Turning Radius (m)		9.45
Feedlines (number)		1 Coax 50 Ohm
Weight (kg)		80
Windload at 130 km/h		1.200 N / 1,49 m² / 16,2 feet²

Price ***		3.699,00 EUR

* = average gain over dipol in free-space / for comparison: 2 el monobander 4 dBd, 3 el 5-6 dBd

** = average gain at 20m above ground (= dBd + 2.15 dB isotropic + about 5 dB ground reflection)

*** = outside EU minus 19% tax - subject to change