Specifications

Nominal physical product characteristics

  • Material: polypropylene with UV blocker
  • Weight: 2.5 grams
  • Outer dimensions: 98.5 x 14.5 x 5.5mm
  • Wire spacing (conductor centre to conductor centre): 84mm.
  • Usable wire diameter, insulated, including insulation: ± 2 - 3.5 mm.
  • Usable wire diameter, bare: ± 2 - 2.5 mm.
  • Recommended spacing between spreaders: ± 50cm.

Feed line impedances for various wire diameters

The following table on the left shows the nominal characterstic impedance (Zc) of a ladder line constructed with Instant Ladder Line clip-on wire spreaders, for various wire diameters. Note: this is the diameter (i.e. not the cross sectional area) of the conductor and does not take into account the thickness of the insulation. The conversion table on the right may help you to determine the wire diameter from AWG (American Wire Gauge) and cross sectional area wire thicknesses specifications.

Wire Diameter mm Zc ohms USA Wire Gauge (AWG) Diameter (inches) Diameter (mm) Cross Sectional Area (mm2)
0.25
781.23
7
0.1443
3.67
10.55
0.50
698.05
8
0.1285
3.26
8.36
0.75 
658.68
9
0.1144
2.91
6.63
1.00
614.88
10
0.1019
2.59
5.26
1.13
600.21
11
0.0907
2.30
4.17
1.25
588.10
12
0.0808
2.05
3.31
1.50
566.22
13
0.072
1.83
2.63
1.75
547.72
14
0.0641
1.63
2.08
2.00
531.70
15
0.0571
1.45
1.65
2.25
517.56
16
0.0508
1.29
1.31
2.50
504.92
17
0.0453
1.15
1.04
2.75
493.48
18
0.0403
1.02
0.82
3.00
483.04
19
0.0359
0.91
0.65
3.25
473.44
20
0.032
0.81
0.52
3.50
464.54
21
0.0285
0.72
0.41
   
22
0.0254
0.65
0.33
   
23
0.0226
0.57
0.26
   
24
0.0201
0.51
0.20
   
25
0.0179
0.45
0.16
   
26
0.0159
0.40
0.13
Stats