RG500M, P3 500 JCA, P3 500 JCAM109, P3 500JCASS trunk cable from Billow Electronics;
Both Welded type and Seamless type available:
1) Construction
Center Conductor: 2.77+0.01mm Solid Copper/Copper Clad Aluminum
Dielectric: 11.43+0.05mmFoam PE
Outer Conductor: 12.70mm Aluminum Tube
Outer Conductor Thickness: 0.64mm
Jacket: 14.22+0.05mm PVC / PE
Jacket Wall Thickness: 0.76mm
Messenger: 2.77mm Steel
Jelly/APD Per Customer' Special Requirement
2) Characteristics
Impedance: 75+3 Ohm
Capacitance: 50+3nF/km, 15.3+1pF/ft
Velocity of Propagation: 87%
 
3) Attenuation  
Attenuation [@68o F. (20o C.)]
Frequency (MHz) Maximum (dB/100 ft.) Maximum (dB/100 m)
5 0.16 0.52
50 0.50 1.64
108 0.73 2.39
150 0.86 2.82
193 1.01 3.31
250 1.15 3.77
300 1.26 4.13
350 1.36 4.46
400 1.47 4.82
450 1.56 5.12
500 1.65 5.41
550 1.75 5.74
600 1.83 6.00
750 2.04 6.69
1000 2.41 7.91