Collinear Phased 5/8-wave with two coaxial chokes to suppress cable radiation
The Style 399-1M is the same as the 399-1, but it has a special sleeve for mast mounting. A professional quality antenna in a compact package. This extra-duty antenna combines strength and performance for use where you really need the efficiency of a large antenna, but don't have room for one.
Brass and copper elements
Chrome-plated brass ferrule with standard 1"-14 thread
Aluminum sleeve for mast mounting
Suggested mount: 1-1/4" U-bolts are supplied. The 399-1M can be strapped to a larger mast using steel banding (not supplied)