donny sharp wrote:

i installed a cobra 25ltd its been peaked & tuned , i think 28 wtts
anyway had the swr's set , the tech that set them said i need 20 to 25 feet
of coax to complete the wave . is there truth to this or was he just trying
to get me to purchase more cable
and if this is true will it mess up my swr's on my system now?
last question , anyone know what else , besides a liner , i can do to
increase my power & range
thanks donny aka rockin-rabbit


1) Any length will do if it's a properly grounded antenna.
2) There is only one SWR, Standing Wave Ratio.
3) Now that the radio has been peaked to max smoke, you can't use a linear with
that radio because it will sound terrible.
4) Any sideband radio is a better quality radio than a Cobra 25.
5) A radio wave at 27.185 MHz (ch 19) is around 34 feet long.
6) Signals in the coax travel at 66 to 78 % of the speed of light. This is
the velocity factor. Signals travel at 95% on the antenna itself. This
shortens the required coax for a wavelength.
7) Half-wave multiples of coax mimic the SWR on the other end.