Interesting Questions

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From: KE3FL@delphi.com
Date: Tue Dec 19 1995 - 14:36:04 EST


Folks-- With the help of Paul/NA5N who gave us a nice table (oh, one
correction, the equ for a full wavelength should be:
Coax length (ft.) = 984VF/f one wavelength Not: 948VF/f.)
(3E8/E6 * 39.37 / 12 = 984.25)
we can now figure the electrical half wavelength of coax needed to
measure the SWR correctly.

INTERESTING QUESTIONS: In the ARRL book "now You're Talking" they
have an 80/40 meter dipole design & they suggest using 100 feet of
coax. What is the electrical half wavelength (EHWL) for 3.700 MHz
and for 7.125 MHz. (Center of the Novice bands, as we all know &
love.) Is 100 feet of RX-8 coax (vf = .78) a multiple of the EHWL for
either or both of these? If not, how far off is it? Will this be
dangerous for the rig?

73 de KE3FL/Phil
:-)


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