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Inverted V Length Controversy.

Feb 13th, 12:38

W9BOQ

Joined: Apr 27th 2018, 10:50
Total Topics: 0
Total Posts: 0
Hello all Hams everywhere,

I would like to settle this once and for all.

Most online inverted V calculators will give you a leg length that is shorter than a dipoles. On 160 meters by several feet. 123' to 117'

Then there are some sites that say longer. They site an error in the ARRL antenna book which remained uncorrected for decades. Apparently since 2003 the handbook now says longer.

Please, let's settle this here and now. ;)


73,
DW
Feb 13th, 19:08

W1VT

Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
There are at least six significant factors.
Insulation
Height above ground
Type of ground (conductivity and dielectric constant)
Other antennas
Angle of the Vee
Interaction with the coax shield with/without a balun

With this many variables, I suggest computer modeling or cut and try.

I have two dozen antennas and really good ground, so my yard is hardly representative of the "typical" ham station.
I've been grinding up leaves all winter to make compost to add even more organic matter to my soil.

Zak Lau W1VT
ARRL Senior Lab Engineer

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