[TowerTalk] Matched "Bury Flex" cables

[donovanf@starpower.net]

Peak phase error due to transmission line mismatch occurs with 
lines that are an odd number of 1/8th wavelengths long.  The 
are no phasing errors due to mismatch when the lines are any 
multiple of 1/4 wavelength.

In an array of phased Yagis, phasing errors due to mismatch 
are completely eliminated if all of the phasing lines are directly 
connected together at the common point.   This allows the 
phasing lines used in phased Yagis to be any length

In phased Yagi arrays, there may be some advantage to using 
line lengths that are odd multiples of a 1/4 wavelength -- if, and 
ONLY if -- there is no matching network at the feedpoint (direct 
50 ohm feed with no hairpins, beta matches, gamma matches, t-
matches, etc).

In phased verticals, errors due to phasing line mismatch can be 
a serious source of phasing errors if the phasing lines are any 
length other than a multiple of 1/4 wavalength.  This is because, 
in phased verticals (other than broadside arrays), the phasing 
lines are typically not directly connected together at the 
common point.  There is usually a phasing network at the 
common point

73
Frank
W3LPL
donovanf at erols.com