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Coaxial Cable Notes
Home > HF Contesting > Hardware Notes > Coax Cable Notes
This page contains information about Coaxial Cable.
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

 CONDUCTORINSULATIONSHIELDJACKET 
TypeStrandsDiam.TypeDiam.CoverTypeDiam.VFpf/
ft
Atten/
100ft
50 Ohm
RG-87/190.108FP0.28597%PE0.4050.78260.5db
RG-8*7/190.108FP0.285*96%PE0.4800.78260.5db
RG-8A7/210.085PE0.28597% NC0.4050.66300.5db
RG-9*7/210.86PE0.280*96% NC0.4200.66300.6db
RG-58Solid0.32PE0.11695% PV0.1930.66291.2
RG-58A19/330.35PE0.11696%PV0.1950.66311.4db
RG-58A*7/280.37PE0.114*96%PV 0.2400.66311.5db
RG-58C19/330.35PE0.11696%NC0.1950.66311.4db
RG-141#Solid0.037TF0.116#96% FG0.1900.70291.1db
RG-1747/340.019PE0.06088% PV0.1010.66313.3db
RG-223#Solid0.035PE0.116#*97%NC0.2120.66311.2db
9913Solid0.108FP0.285100% PV0.4050.84240.4db
72 Ohm
RG-11Solid0.064FP0.28595%PV0.4050.78170.4db
RG-11A7/260.048PE0.28597%PV0.4050.66210.7db
RG-59Solid0.023PE0.14695%PV0.1460.66211.1db
RG-59*Solid0.032FP0.143*96% PE0.3150.78171.0db
RG-59BSolid0.023PE0.14695% NC0.2420.66211.1db

Notes:

  1. * = Double shielded Coax
  2. # = Silver plated centre conductor and shield
  3. Centre conductor is copper or tinned copper
    except where indicated by #
  4. Insulation dielectric Codes PE: Polyethylene FP: Foam Polyethylene TF: High Temperature Teflon
  5. Jacket Material Codes PE: Polyethylene PV: PVC
    NC: Non-contaminating FG: Fiberglass
  6. VF = Velocity factor of coax (eg 0.66 = 66%)
  7. pf/ft = Capacitance (in pf) per foot
  8. Attenuation/100ft = coax attenuation per 100ft at 10Mhz
  9. 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.

CableP/NImp.VFCenterDiel-Cap.ShieldCoatOD"Volts
type (ohms) cond.ectric(pf/ft)   RMS
RG8101500.84.108" bcsspe24AL/tcPVC IIA.4054000
RG8101A500.84.108" bcsspe24AL/tcPVC.4054000
RG8102500.8419/23 bcsspe24AL/tcPVC IIA.4054000
RG8103A500.8219/23 bcmcfpe24.6AL/tcIIIA.4052000
RG8106500.8219/23 bcmcfpe24.6AL/tcTPE.4054000
RG81000500.85.109" ccALccfpe23.9AL/tcIIIA.4054000
RG89913F500.8419X23 bchdfpe24.6AL/tcIIIA.4054000
LMR1005500.86.142" ccALccfpe23.6AL/tcIIIA.5006500
LMR1008500.87.176" ccALccfpe23.4AL/tcIIIA.5908000
LMR1009500.85.177" str bcccfpe23.4AL/tcIIIA.5908000
LMR900500.87.262" bc tubeccfpe23.4AL/tcIIIA.6809000
LMR1200500.88.349" bc tubeccfpe23.1AL/tcIIIA.92010000
LMR1700500.89.527" bc tubeccfpe22.8AL/tcIIIA1.3512000
8X115500.7819/29 bcmcfpe28bcPVC Chr..242300
8X116500.7819/29 bcmcfpe28bcPVC IIA.242300
8X117500.7219/29 bcdfpp29.1tcPVC IIA.2421500
8X118500.819/29 bcmcfpe24.5AL/tcPVC IIA.242300
8X118FF500.819/29 bcmcfpe24.5AL/tcTPE.242300
RG11
A/U
121750.667/.0159" bcpe20.6bcPVC IIA.4053700
58124500.66.032" bccspe28.8tcIIIA.1951400
RG58
/U
12553.50.66.032" bcpe28.8tcPVC.1951400
RG58A126520.6619/
.0071" bc
pe29.6tcPVC.1951400
RG58C127500.6619/
.0071" bc
pe30.8tcPVC IIA.195"1400
58129FF520.7819/
.0071" bc
mcfpe24.6AL/tcTPE.1951400
RG59
B/U
135750.66.023" bccspe26.5bcPVC IIA.2421700
RG62
A/U
141930.84.0253" bccssspe13.5bcPVC IIA.242750
RG83
/U
165350.66.102" bcpe44bcPVC IIA.4053700
RG142
B/U
153500.695.037" sccsptfe29sc/scIX.1951400
RG174
A/U
139500.667/.0063" ccspe30.8tcIIA.1001100
RG174
/U
140500.667/.0063" ccspe30.8tcI.1001100
RG178
B/U
157500.6957/.004" sccsptfe29scIX.072750
 
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