The Arrow Antennas M/B II is a mounting bracket designed for portable Arrow antennas equipped with a 3/4-inch square boom, equivalent to approximately 19 mm.

It allows the antenna to be secured to a vertical mast measuring up to 1.5 inches – approximately 38 mm – in diameter. The system uses an angle bracket and saddle clamp, providing a practical mounting solution for portable operation, testing and temporary installations.

Wing nuts allow the assembly to be tightened or removed by hand without tools. This makes the M/B II particularly useful for field activities, satellite communications, SOTA, POTA and amateur radio demonstrations.

The bracket uses aluminium and stainless-steel components. Its design secures the antenna’s square boom on one side and the round mast on the other.

When used with the Arrow II 146/437-10, the manufacturer instructs the operator to remove the foam hand grip so the bracket can be positioned behind the reflector element.

Main features

• Type: antenna mounting bracket
• Brand: Arrow Antennas
• Model: M/B II
• Boom compatibility: 3/4-inch square
• Boom dimensions: approximately 19 × 19 mm
• Maximum mast diameter: 1.5 in – approximately 38.1 mm
• Mast type: round
• Mounting system: angle bracket and saddle clamp
• Tightening system: wing nuts
• Tools required: no
• Materials: aluminium and stainless steel
• Installation type: temporary or portable
• Orientation: boom mounting on a vertical mast
• Antenna included: no
• Mast included: no

Compatibility

Compatible with Arrow Antennas products using a 3/4-inch square boom, including several models from the following ranges:

• Arrow II portable antennas
• Arrow II satellite antennas
• 146/437 models with a 3/4-inch boom
• Compatible portable VHF and UHF Yagi antennas
• Other Arrow models with an approximately 19 mm square boom

Recommended applications

• Temporary installation of Arrow II antennas
• Mounting on portable masts
• Amateur radio satellite communications
• SOTA and POTA operation
• Field Day and field activities
• VHF and UHF antenna testing
• Training and demonstrations
• Temporary portable-station installations

Package contents

• Boom angle bracket
• Mast saddle clamp
• Mounting bolts
• Wing nuts

Important note

Before installation, confirm that the antenna has a 3/4-inch square boom and that the mast does not exceed 1.5 inches in diameter.

On the Arrow II 146/437-10, the foam hand grip must be removed so the bracket can be positioned behind the reflector element, as instructed by the manufacturer.

The M/B II is primarily designed for temporary installations. Permanent installations or locations exposed to wind, rain or continuous mechanical loads require a mounting system specifically designed and rated for those conditions.

This product includes only the bracket and its mounting hardware. The antenna, mast, rotor and cables are not included.