Billow Electronics supplies Trunk Coaxial Cable P3 QR 320 412 500 540;
RG540, RG540M, QR540, QR540JCA, QR540JCAM109, QR540JCASS(Jelly filled) trunk cables;
QR 540, QR 540 JCA, QR 540 JCAM109, QR 540 JCASS trunk cables;
Both Welded type and Seamless type available:
QR540 Specification:

1) Construction
Center Conductor: 3.15+0.01mm Solid Copper/Copper Clad Aluminum
Dielectric: 13.03+0.05mmFoam PE
Outer Conductor: 13.72mm Aluminum Tube
Outer Conductor Thickness: 0.343mm
Jacket: 15.49+0.05mm PVC / PE
Jacket Wall Thickness: 0.89mm
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 0.13 0.43
50 0.43 1.41
108 0.63 2.07
150 0.74 2.43
193 0.87 2.85
250 0.99 3.25
300 1.08 3.54
350 1.17 3.84
400 1.26 4.13
450 1.35 4.44
500 1.41 4.63
550 1.51 4.95
600 1.59 5.23
750 1.80 5.02
1000 2.10 6.91