35422-25
©2021 CommScope, Inc. All rights reserved. All trademarks identified by ® or ™ are registered trademarks,
respectively, of CommScope. All specifications are subject to change without notice. See www.commscope.com for the
most current information. Revised: October 20, 2021
Page of 1 5
LDF4-50A, HELIAX® Low Density Foam Coaxial Cable, corrugated
copper, 1/2 in, black PE jacket, phase stabilized.
Product Classification
Product Type Coaxial wireless cable
Product Brand HELIAX®
Product Series LDF4-50A
Ordering Note CommScope® non-standard product
General Specifications
Flexibility Standard
Jacket Color Black
Performance Note Attenuation values typical, guaranteed within 5%
Dimensions
Diameter Over Dielectric 12.954 mm|0.51 in
Diameter Over Jacket 15.875 mm|0.625 in
Inner Conductor OD 4.826 mm|0.19 in
Outer Conductor OD 13.97 mm|0.55 in
Nominal Size 1/2 in
Electrical Specifications
Cable Impedance 50 ohm ±1 ohm
Capacitance 75.8 pF/m|23.104 pF/ft
dc Resistance, Inner Conductor 1.48 ohms/km|0.451 ohms/kft
dc Resistance, Outer Conductor 2.69 ohms/km|0.82 ohms/kft
dc Test Voltage 4000 V
Inductance 0.19 µH/m|0.058 µH/ft
100000 MOhms-km
35422-25
©2021 CommScope, Inc. All rights reserved. All trademarks identified by ® or ™ are registered trademarks,
respectively, of CommScope. All specifications are subject to change without notice. See www.commscope.com for the
most current information. Revised: October 20, 2021
Page of 2 5
Insulation Resistance
100000 MOhms-km
Jacket Spark Test Voltage (rms) 8000 V
Operating Frequency Band 1 – 8800 MHz
Peak Power 40 kW
Phase Stabilized Yes
Velocity 88 %
Attenuation
Frequency (MHz) Attenuation (dB/100 m) Attenuation (dB/100 ft) Average Power (kW)
1.0 0.211 0.064 36.11
1.5 0.259 0.079 29.46
2.0 0.299 0.091 25.5
10.0 0.672 0.205 11.35
20.0 0.954 0.291 7.99
30.0 1.172 0.357 6.51
50.0 1.521 0.463 5.02
85.0 1.995 0.608 3.82
88.0 2.031 0.619 3.76
100.0 2.169 0.661 3.52
108.0 2.256 0.688 3.38
150.0 2.673 0.815 2.85
174.0 2.887 0.88 2.64
200.0 3.103 0.946 2.46
204.0 3.135 0.956 2.43
300.0 3.835 1.169 1.99
400.0 4.462 1.36 1.71
450.0 4.749 1.447 1.61
460.0 4.804 1.464 1.59
500.0 5.021 1.53 1.52
512.0 5.085 1.55 1.5
600.0 5.533 1.686 1.38
700.0 6.009 1.831 1.27
800.0 6.456 1.968 1.18
824.0 6.56 1.999 1.16
894.0 6.855 2.089 1.11
7.124 2.171 1.07