Tech Support:
www.steppir.com/support
Tel: 425.891.6134
Page 21
CHAPTER ONE
SECTION 1.1
BOOM ASSEMBLY (continued)
Fractional Length
Metric Length
Description
0.75 inch (3/4”)
1.91 cm
Reflector
20.75 inch (20-3/4”)
52.71 cm
39 ft Truss support/ 80m dipole support
30.75 inch (30-3/4”)
78.11 cm
Reflector return
70.125 inch (70-1/8”)
178.1 cm
Boom truss clamp
84.75 inch (84-3/4”)
215.26 cm
Driven element
120 inch
304.8 cm
OPTIONAL 6m director 1
200.75 inch (200-3/4”)
509.91 cm
Director 1
218.25 inch (218-1/4”)
554.35 cm
49 ft Element truss
230.75 inch (230-3/4”)
586.11 cm
Director 1 return
243.9 inch (243-7/8”)
619.51 cm
Mast plate
260.0 inch
660.4 cm
Antenna switch
277.5 inch (277-1/2”)
704.85 cm
OPTIONAL 6m director 2
350.75 inch (350-3/4”)
890.91 cm
Director 2
434.5 inch (434-1/2”)
1103.63
OPTIONAL 6m director 3
441.875 inch (441-7/8”)
1122.4 cm
Boom truss clamp
474.75 inch (474-3/4”)
1205.87 cm
Director 3 return
494.75 inch (494-3/4”)
1256.66 cm
39 ft Truss support / 80m Dipole Support
497.75 inch (497-3/4”)
1264.29 cm
Director 3
MARK LOCATION
LABEL
Figure 1.12
Mark each side of the saddle
with a permanent marker
FIG. 1.13
DB42 BOOM MARKING TABLE