COAXIAL CABLE SPECIFICATIONS
MAJOR TYPES
DATA SHEET COMPILED BY PAUL HARDEN NA5N
COAX
CONDUCTOR
INSULATION SHIELD
JACKET
TYPE
|
Strands
|
Diameter
|
Material
|
Diameter
|
Cover
|
Material
|
Diameter
|
Velocity Factor
|
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
|
* = Double shielded Coax
# = Silver plated centre conductor and shield
-
1. Centre conductor is copper or tinned copper except where indicated
by #
-
2. Insulation dielectric Codes PE: Polyethylene FP: Foam Polyethylene
TF: High Temperature Teflon
-
3. Jacket Material Codes PE: Polyethylene PV: PVC NC: Non-contaminating
FG: Fiberglass
-
4. VF = Velocity factor of coax (eg 0.66 = 66%)
-
5. pf/ft = Capacitance (in pf) per foot
-
6. Attenuation/100ft = coax attenuation per 100ft at 10Mhz
-
7. Diameters for centre conductor, insulation and jacket are used for
selecting proper connector (BNC, PL259, etc)
The physical length of coax is:
Coax length (ft) = 948/f One wavelength
= 246/f Quarter wavelength
For example:
A Quarter wavelength of RG-58/U (VF = 0.66) at 7.040Mhz would
be 23.06ft in length
Credit for this information is to Paul Harden NA5N QRP-L #38