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Coaxial Cable Notes
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Coaxial Cable Basics

The physical length of one wavelength of coax is:
Coax length, in feet = (984/Frequency) * Velocity Factor

The physical length of one quarter-wavelength of
coax is:
Coax length, in feet = (246/Frequency) * Velocity Factor

For example:
A Quarter wavelength of RG-58/U (VF = 0.66) at
7.025Mhz would be 23.11 feet long.

Coaxial Cable Specifications - 1

This table compiled by Paul Harden, NA5N

CONDUCTOR INSULATION SHIELD JACKET

Type Strands Diam. Type Diam. Cover Type Diam. VF pf/
ft Atten/
100ft

50 Ohm

RG-8 7/19 0.108 FP 0.285 97% PE 0.405 0.78 26 0.5db

RG-8* 7/19 0.108 FP 0.285 *96% PE 0.480 0.78 26 0.5db

RG-8A 7/21 0.085 PE 0.285 97% NC 0.405 0.66 30 0.5db

RG-9* 7/21 0.86 PE 0.280 *96% NC 0.420 0.66 30 0.6db

RG-58 Solid 0.32 PE 0.116 95% PV 0.193 0.66 29 1.2

RG-58A 19/33 0.35 PE 0.116 96% PV 0.195 0.66 31 1.4db

RG-58A* 7/28 0.37 PE 0.114 *96% PV 0.240 0.66 31 1.5db

RG-58C 19/33 0.35 PE 0.116 96% NC 0.195 0.66 31 1.4db

RG-141# Solid 0.037 TF 0.116 #96% FG 0.190 0.70 29 1.1db

RG-174 7/34 0.019 PE 0.060 88% PV 0.101 0.66 31 3.3db

RG-223# Solid 0.035 PE 0.116 #*97% NC 0.212 0.66 31 1.2db

9913 Solid 0.108 FP 0.285 100% PV 0.405 0.84 24 0.4db

72 Ohm

RG-11 Solid 0.064 FP 0.285 95% PV 0.405 0.78 17 0.4db

RG-11A 7/26 0.048 PE 0.285 97% PV 0.405 0.66 21 0.7db

RG-59 Solid 0.023 PE 0.146 95% PV 0.146 0.66 21 1.1db

RG-59* Solid 0.032 FP 0.143 *96% PE 0.315 0.78 17 1.0db

RG-59B Solid 0.023 PE 0.146 95% NC 0.242 0.66 21 1.1db

Notes:

* = Double shielded Coax
# = Silver plated centre conductor and shield
Centre conductor is copper or tinned copper
except where indicated by #
Insulation dielectric Codes PE: Polyethylene FP: Foam Polyethylene TF: High Temperature Teflon
Jacket Material Codes PE: Polyethylene PV: PVC
NC: Non-contaminating FG: Fiberglass
VF = Velocity factor of coax (eg 0.66 = 66%)
pf/ft = Capacitance (in pf) per foot
Attenuation/100ft = coax attenuation per 100ft at 10Mhz
Diameters for centre conductor, insulation and jacket are used for selecting proper connector
(BNC, PL259, etc.)

Coaxial Cable Specifications - 2

Source of this information: Unknown.

Cable P/N Imp. VF Center Diel- Cap. Shield Coat OD" Volts

type (ohms) cond. ectric (pf/ft) RMS

RG8 101 50 0.84 .108" bc sspe 24 AL/tc PVC IIA .405 4000

RG8 101A 50 0.84 .108" bc sspe 24 AL/tc PVC .405 4000

RG8 102 50 0.84 19/23 bc sspe 24 AL/tc PVC IIA .405 4000

RG8 103A 50 0.82 19/23 bc mcfpe 24.6 AL/tc IIIA .405 2000

RG8 106 50 0.82 19/23 bc mcfpe 24.6 AL/tc TPE .405 4000

RG8 1000 50 0.85 .109" ccAL ccfpe 23.9 AL/tc IIIA .405 4000

RG8 9913F 50 0.84 19X23 bc hdfpe 24.6 AL/tc IIIA .405 4000

LMR 1005 50 0.86 .142" ccAL ccfpe 23.6 AL/tc IIIA .500 6500

LMR 1008 50 0.87 .176" ccAL ccfpe 23.4 AL/tc IIIA .590 8000

LMR 1009 50 0.85 .177" str bc ccfpe 23.4 AL/tc IIIA .590 8000

LMR 900 50 0.87 .262" bc tube ccfpe 23.4 AL/tc IIIA .680 9000

LMR 1200 50 0.88 .349" bc tube ccfpe 23.1 AL/tc IIIA .920 10000

LMR 1700 50 0.89 .527" bc tube ccfpe 22.8 AL/tc IIIA 1.35 12000

8X 115 50 0.78 19/29 bc mcfpe 28 bc PVC Chr. .242 300

8X 116 50 0.78 19/29 bc mcfpe 28 bc PVC IIA .242 300

8X 117 50 0.72 19/29 bc dfpp 29.1 tc PVC IIA .242 1500

8X 118 50 0.8 19/29 bc mcfpe 24.5 AL/tc PVC IIA .242 300

8X 118FF 50 0.8 19/29 bc mcfpe 24.5 AL/tc TPE .242 300

RG11
A/U 121 75 0.66 7/.0159" bc pe 20.6 bc PVC IIA .405 3700

58 124 50 0.66 .032" bccs pe 28.8 tc IIIA .195 1400

RG58
/U 125 53.5 0.66 .032" bc pe 28.8 tc PVC .195 1400

RG58A 126 52 0.66 19/
.0071" bc pe 29.6 tc PVC .195 1400

RG58C 127 50 0.66 19/
.0071" bc pe 30.8 tc PVC IIA .195" 1400

58 129FF 52 0.78 19/
.0071" bc mcfpe 24.6 AL/tc TPE .195 1400

RG59
B/U 135 75 0.66 .023" bccs pe 26.5 bc PVC IIA .242 1700

RG62
A/U 141 93 0.84 .0253" bccs sspe 13.5 bc PVC IIA .242 750

RG83
/U 165 35 0.66 .102" bc pe 44 bc PVC IIA .405 3700

RG142
B/U 153 50 0.695 .037" sccs ptfe 29 sc/sc IX .195 1400

RG174
A/U 139 50 0.66 7/.0063" ccs pe 30.8 tc IIA .100 1100

RG174
/U 140 50 0.66 7/.0063" ccs pe 30.8 tc I .100 1100

RG178
B/U 157 50 0.695 7/.004" sccs ptfe 29 sc IX .072 750