COAXIAL CABLES

 

 

DOUBLE SCREENED :
Type No. No.of Wires Dia. Over Dia.Over Dia.over Nominal Capaci- Attn.at in.Dielec
  Dia.of Wire Dielectric Shield/ Jacket Imped- tance. 400 MHz. tric Strength
(mm)/ Matl. PE (mm) Matl.(mm) (mm) ance(W) pF/Mt. dB/100mt (RMS)V
                 
RG214/U 7/0.75 SPC 7.24+0.18 9.14 SPC 10.80+0.18 50+2 98.4 18.0 10000
RG216/U 7/0.40 ATC 7.24+0.18 9.14 ABC 10.80+0.18 75+3 67.25 17.1 10000
RG217/U 1/2.69 ABC 9.40+0.25 11.75 ABC 13.84+0.25 50+2 96.8 14.1 12000
RG223/U 1/0.89 SPC 2.95+0.10 4.47 SPC 5.49 MAX. 50+2 96.3 38.4 5000
3C-2W 1/0.50 ABC 3.10+0.05 4.80 ABC 6.50+0.10 75+3 67.0 42.0 5000
3C-2T 1/0.50 ABC 3.10+0.05 5.50 ABC 7.40+0.10 75+3 67.0 23.0 5000
              (1MHz)  
5C-2W 1/0.80 ABC 4.90+0.10 6.20 ABC 8.30+0.10 75+3 67.0 27.0 7000
10C-2W 7/0.50 ABC 9.40+0.10 11.20 ABC 14.40+0.10 75+3 102 15.0 10000
ABC: ANNEALED BARE COPPER, ATC: ANNEALED TINNED COPPER, CCS: COPPER COVERED STEEL,
SPC: SILVER PLATED COPPER, PE: POLYETHYLENE.
HIGH TEMPERATURE CO-AXIALS :
Type No No.of Wires Dia. over Dia.Over Dia.over Nominal Capaci- Attn.at Max.Power
    Dia.of Wire Dielectric Shield/Jacket Imped- tance. 400 MHz. watts)
  mm)/ Matl. PE (mm) Matl.(mm) (mm) ance(n) pF/Mt. dB/100mt at 10 MHz
                 
RG 142/U 1/0.94SCCS 2.95+0.05 4.00 SPC 4.95+0.10 50+2 97.0 25.8 6000
RG 165/U 7/0.81 SPC 7.24+0.05 9.20 SPC 10.41+0.10 50+2 96.8 15.5 *15000
RG 178/U 7/0.10SCCS 0.86+0.05 1.32 SPC 2.03+0.10 50+2 95.0 95.0 640
RG 179/U 7/0.10SCCS 1.60+0.05 2.06 SPC 2.79+0.10 75+2 65.6 68.9 1400
RG 187/U 7/0.10SCCS 1.60+0.05 2.06 SPC 2.79+0.10 75+2 65.6 68.9 1400
RG 188/U 7/0.17SCCS 1.52+0.05 1.98 SPC 2.79+0.10 50+2 95.0 57.5 770
RG 195/U 7/0.10SCCS 2.59+0.05 3.05 SPC 3.94+0.10 95+2 52.5 55.8 2000
RG 196/U 7/0.10SCCS 0.86+0.05 1.32 SPC 2.03+0.10 50+2 95.0 95.0 640
RG 225/U 7/0.79 SPC 7.20+0.05 10.20 SPC 11.20+0.10 50+2 97.0 15.5 *15000
RG 316/U 7/0.17SCCS 1.52+0.05 1.98 SPC 2.79+0.10 50+2 95.0 57.5 770
RG 400/U 7/0.32 SPC 2.95+0.05 3.90 SPC 4.95+0.10 50+2 97.0 25.8 6000
RG 402/U 1/0.92SCCS 2.98+0.05 3.58AEBC* 50+2 98.1 2.6 5000
RG 405/U 1/0.51SCCS 1.68+0.05 2.20AEBC* 50+2 105 4.9 5000
AEBC: A DEOXIDISED AND ANNEALED ELECTROLYTIC BARE COPPER TUBE, SCCS: SILVER PLATED
COPPER CLAD STEEL, SPC: SILVER PLATED COPPER, * 2 FIBRE GLASS BRAID JACKET
CONDUCTORS FOR SIGNAL TRANSMISSION AND MEASUREMENT:

 

 

COAXIAL CABLE FORMULA :

 

Capacitance (C) = 7.36 E / log (D/d) = Picofarads / ft.

Inductance (L) = 40 log (D/d) = Microhenries / ft.

Velocity (%) = 100 / E

Time Delay = 1.0167 E

Cutoff Frequency = 7.50 / E (D/d) =F (GHz) 

Attenuation (a) = 0.435 / ZO (D) [D/d K1+K2] / F +2.78 E (PF) (F).

Where :

a = db/100 ft.

d = diameter of centre conductor (inch)

D = dielectric diameter (inch)

E = insulation dielectric constant

log = logarithm to base 10

K1 = strand factor

K2 = braid factor

F = frequency MHz

PF = power factor.

 

 

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