OB4-40

	OB4-40		4 element Yagi 40m

=>	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.




	->	The two driven elements are not connected by a lossy flimsy piece of wire. As usual in our Yagis taking advantage of the patented „OptiBeam direct coupled driver feed system“ as well the drivers of this Yagi are connected by two stable square aluminium phase line tubes on which the hf feels more than comfortable.

Bands

Gain (dbd)*

5,0

Gain (dbi)**

11,9

F/B (db)

SWR 7,0 - 7,06 - 7,1 - 7,15 - 7,2 - 7,3

1,5 - 1,1 - 1,2 - 1,2 - 1,1 - 1,3

Elements (number)

Max. Elementlength (m)

14,74

Boomlength (m)

11,9

Turning Radius (m)

9,45

Feedlines (number)

Coax 50 Ohm

Weight (kg)

Windload at 130km/h

1.200 N / 1,49 m² / 16,2 feet²

Price (EUR) ***

3.095,00

* = 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