Changes

Coax Cable for Ham Radio Applications

1,064 bytes added, 22:17, 30 December 2016
/* RG8, RG8X, RG58U */
The following lines were added (+) and removed (-):
RG8/U and RG8A/U has been obsoleted and RG213/U is the modern replacement.  Both RG213/U and RG214/U are considered military specification cable.  This is very rugged cable and a popular choice among amateur radio operators.  However, the cable begins to be noticeably lossy at higher frequencies.  A 50ft run of RG213 for the 2m ham band is perfectly acceptable.  A 100ft run of RG213 for the 70cm ham band is ill advised.Comparing RG8X and RG58: They are both the same diameter.  RG58 is more flexible.  RG8X has slightly less signal loss.  In a mobile installation any loss below 1GHz is inconsequential.More modern is the Belden 9913F7, which uses 10 AWG stranded (7x19) .108" bare copper conductor and gas-injected foam HDPE dieletric insulation.  This makes it more competitive with LMR400.  The "F" is the indicator of a "foam" dielectric.  If the designation is LMR-400 UF then the U indicates it is UV resistant, which withstands better in direct sunlight.Belden 9913 F7 is a low loss flexible foam dielectric with a VP (velocity Factor) of 85%. 
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