I just replaced my low 160 meter dipole with an Inverted L to improve my
transmitting signal. The Inverted L is about 2 feet from a crank up tower I
use on other bands.
Here is the general layout:
Tower height is 55 ft. On top is a 4 element WRC tri-bander and 8 feet above
is a 2 element M2 shortened 40 meter yagi.
The inverted L is 55 ft vertical about 2 feet from the tower, then 80 ft
horizontal. Single wire (#13 copper).
The radial system is buried 40 wires 100-135 ft long.
After installation I got the following readings at the base of the antenna:
SWR increases from 1.2 to 1.6 (1.800 - 2.000 Mhtz)
Measured "Resistance" was 52-77 ohms; Reactance 7-18 ohms (using
MFJ 259B)
There is obvious interaction between the "L" and the Tower/Yagis. Has anyone
had experience with or modeled such a setup? I am really curious as to
what I can expect from this setup. Thanks for any help you can provide.
Udo NI0G
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