Product data

QR 320 Series Cables
Product Specifications
Frequency
(Mhz)
(db/100 ft)
Max
(db/100 m)
Max.
50.240.79
30 0.62 2.03
45 0.76 2.49
50 0.80 2.62
55 0.84 2.76
83 1.07 3.51
108 1.22 4.00
150 1.45 4.76
181 1.60 5.25
193 1.65 5.41
211 1.73 5.68
220 1.76 5.77
250 1.86 6.10
270 1.94 6.37
300 2.04 6.69
325 2.17 7.12
350 2.25 7.38
375 2.30 7.55
400 2.38 7.81
425 2.45 8.04
450 2.52 8.27
500 2.72 8.92
550 2.85 9.35
600 2.98 9.78
750 3.34 10.96
865 3.62 11.87
1000 3.89 12.76
Attenuation @ 68°F (20°C)
Physical Dimensions
Component Inches mm
Nominal Center Conductor Diameter 0.071 1.80
Nominal Diameter Over Dielectric 0.294 7.47
Nominal Diameter Over Outer Conductor 0.320 8.13
Nominal Outer Conductor Thickness 0.013 0.34
Nominal Diameter Over jacket 0.395 10.03
Nominal Jacket Wall Thickness 0.0375 0.89
0.109 2.77
0.083 2.11
Mechanical Characteristics
Minimum Bending Radius 2.0 in 50.8 mm
Maximum Pulling Tension 120 lbs 54.5 kgf
Minimum Breaking Strength
of Messenger (109)
(.083)
1,800 lbs
1,000 lbs
816 kg
f
453 kg
f
Electrical Characteristics
Capacitance
15.3 ± 1.0 pf/ft 50 ± 3.0 nf/ft
Impedance
Velocity of Propagation
Inner Conductor 3.2/8 ohms/1000ft 10.76 ohms/km
Outer Conductor 0.99 ohms/1000ft. 3.25 ohms/km
Loop 4.27 ohms/1000ft 14.01 ohms/km
Maximum D.C. Resistance @ 68°F (20°C)
Diameter of Steel Messenger
Messenger Version
75 ± 3 ohms
87%