Some great information about coax lengths and swr

[BOOTY MONSTER]

if the antenna is not resonate absolutely no length of coax is going to change that .
tune the antenna ...... not the coax .

there is some loss associated with high vswr , but it would have to be high to reduce a signal by 18db .

[Mr.5150cbrn]

if the antenna is not resonate absolutely no length of coax is going to change that .
tune the antenna ...... not the coax .

there is some loss associated with high vswr , but it would have to be high to reduce a signal by 18db .

ok , but explain how you might do / pull that off with a 102 -108 ss whip? which is set usually @ 36 ohm

[Mr.5150cbrn]

if the antenna is not resonate absolutely no length of coax is going to change that .
tune the antenna ...... not the coax .

there is some loss associated with high vswr , but it would have to be high to reduce a signal by 18db .

well over the last weekend , i had been having issues with a 102 whip and swr readings !
and my truck .
when the usual antenna is mounted on cab roof adjusting swr isnt a major deal as running a half wave on the coax tunned fairly well
but when running a 102 behind cab on bed rail and running coax in multiples , swr is way out of spec.
pulled my hair out , but he goes; 102 ss whip 36 ohm reading taken at base of antenna @ pl-259 with a mfj259b analyzer
now i resonated my coax (rg-8x ) vf ".78 to 27.200 giving me a coax length of 28 ft 2.250 in. for a full wave in length netting me a true 1.3;1 swr
not tuning antenna by trimming stinger , but more by tuning the coax to the setup
final measurements on the analyzer freq. 27.200 , swr-1.3, R=40, X=6 .( R &X readings @given freqency ) which equals a 1.1 swr even though the swr bridge reads a swr of 1.3

so in laymens terms yes adjusting length of coax can change the caricaturization of a antenna system in a mobile installation in regards to a 102 whip,

now with a base type of installation , and antennas having adjust-ability though gamma , beta matches , tuning rings etc and the ability to obtain a proper rf ground plane , things are some what different with regards to antenna height ground soil composition (salinity) capacitive reactance and magnetic inductance and a myriad of other variables along with coaxial length and vf's