NMO Antenna Bracket

This page describes an antenna bracket which bolts onto the tail rack and provides a solid mount for an NMO style antenna.

Parts List

Qty	Source	Part No.	Description
1	McMaster-Carr	8975K713	Alloy 6061 Aluminum Rectangular Bar 1/4" Thick, 2" Width, 3' Length
1	McMaster-Carr	91239A457	Class 10.9 Stl Button Head Socket Cap Screw M8 Size, 80 Mm Length, 1.25 Mm Pitch, 10 Pack
2	McMaster-Carr	92511A109	Aluminum Unthreaded Round Spacer 3/4" Od, 1-3/4" Length, 3/8" Screw Size
1	McMaster-Carr	98035A105	Metric Black-Oxide Steel Thick Flat Washer M8 Screw Size, 8.4mm ID, 16mm OD, 2.5 mm - 3.4 mm Thk, 10 Pack
1	McMaster-Carr	94920A500	Metric Class 8 Steel Hex Serrated-flange Nut M8 Screw, 1.25mm Pitch, 13mm W, 7mm H O'all, Black, 25 Pack
1	Antenex	MABVT8	3/8" thick NMO mount with 17' stranded RG-58 cable, no connector
1	Various		BNC crimp-on connector for RG-58 cable

This part is specified in imperial measurements even though the rest of the project is metric.

Bracket Drawing

This drawing needs a few revisions:

• The diameter for the bolt holes needs to be specified (7 or 8 mm?).
• The second set of zip tie holes close to the antenna mount on the long version need to move further in or be eliminated entirely.
• The zip tie holes need to be 2mm larger in diameter to accommodate powder coating.

As a PDF: antenna-bar.pdf

Links

• Assembly pictures: See http://st-gallery.notonthe.net/main.php?g2_itemId=781
• Discussion: http://www.st-owners.com/forums/showthread.php?t=31041

-- MarkFeit - 15 Oct 2007