[Antennas] Re: coax 'sweet lenght'

Sun Oct 10 12:57:17 EDT 2004

As long as you have a perfect impedans match between
radio, cable and antenna, the lenght doesn't matter.
BUT, when you have a missmatch, perhaps something metallic
close to a 27MHz GP-antenna that creates an impedans
fault in the antenna, then the lenght becomes very
critical to keep everything macthed together.
Regard the coax to partly becomming a coaxbalun of some
sort that fixes the impedance problem. But it will only
work within a narrow frequency range and exact coax lenght.
The best thing is of course to fix the impedance problem
as that will make the antenna system more efficient and
also work properly over a wider frequency range.
Ubbe.
-----Original Message-----
From: "FireBrick" <w9ol at billnjudy.com>
>> I remember discussion that there was a 'sweet length' for rg8, rg13 coax lengths.