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Limitations Must work frequencies below the Maximum Usable Frequency (MUF). This is not a DX antenna. Needs to use an antenna tuner for good match. Power Limited to about 200 Watts. Beverage Mode Losses limit achievable gain. NVIS Antenna Dimensions Parts List 2 ea 1.5" PVC Pipes 7.5' long 1 ea 1.5" PVC Coupling 1 ea 1.5" PVC Cap 4 ea Egg type insulators 5 ea Brass Screws, nuts and washers to fit Coaxial Fitting 1 ea SO-239 or UG-266 Female Panel Mount Connector with solder pot center pin 5 ea Stakes (One at the mast center) 4 ea Heavy Solder Lugs to fit brass screws ~150' Antenna Wire (I like braided ground strip kind) ~60' Nylon Rope Coax to Rig As much as you need. Run it up the center of the PVC pipe mast and connect to the Panel Mount Connector. Construction of NVIS Antenna Drill PVC Cap to accept SO-239 and 4 screws and nuts Mount SO-239 to PVC Cap with screw heads down Cut off the head of a brass screw Solder a brass screw to center post of SO-239 Cut antenna wires to length plus a little Fit one end of each wire with solder lugs Fit the other with the egg insulators Install wires to SO-239 using brass nuts and washers {as shown in the figure} Erect antenna (2 men ~ 5 minutes) Tune antenna match for minimum VSWR (also could adjust mast height and wire lengths)
