OPTIBEAM ANTENNAS FROM GERMANY - ENGINEERING AT IT'S BEST

OB17-4 4 Band 40/20/15/10m

Full-size elements on  40- 20-15-10, plus very efficient loaded half-wave elements on 40m.

Click here for photos of the excellent mechanical construction

• The OB17-4 is a high effective Yagi for the classical four bands 40, 20, 15 and 10m, four monobanders on one boom.

• The OptiBeam high Q air coil reduces the length of the 40m elements nearly lossfree down to a little bit below convenient 15 meter length .

• Due to the patented OptiBeam „direct coupled driver feed system“ and the especially developed "40m decoupling stubs“ a non compromise feed with a single 50 Ohm coaxial cable is achieved.

Max. Elementlength (m)- 14.90

Boom length (m) -11.9

Turning Radius (m) - 9.15

Feedlines (number) -1 Coax 50 Ohm

Weight (kg) - 98

Windload at 130km/h - 1.989 N / 2,48 m² / 26,8 feet²

Price - Please contact us.

**=average gain at 20m above ground

*** 28.0-29.0

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