USING WILSON FGT-2 VERTICALS AS A
10 Meter MONOPOLE:
by Yukon John HI3/KL7JR
Updated 12 - 03 -2011
I saw an article in
QST Magazine (August 2011) where W1IS experimented with a 40 meter
quarter-wave vertical monopole antenna, and the first thing I thought of
was why wouldn't this work using Wilson FGT-2 verticals (3 if you have
Using just a pair of
radials in line, 180 degrees apart yields omni-directional coverage which
is what I sought for my small antenna space. This is a simple design and a
simple build. Here's where things get complicated.
Note the old rum barrel on wheels in the photo above used as my "antenna test table" complete with antenna connectors. I bonded the first two metal rings together and to the antenna connectors to broaden the ground plane.
I started out with a pair of 102 inch long radials (1/4 WL on 10m) then I started chopping and taking readings with my MFJ 259B analyzer (no whip tip was used on the FGT-2 nor did I use the ground strap...just let it dangle). Results were:
Notice the "good" numbers on the
last 3 rows in the chart
The metal clothes hangers visible in the photo above were painted white. The FGT antenna is white (also available in black and red). The background color of the patio is white....you know where I'm going with this! Okay, so the numbers look good but what is the monopole really like on 10 meters?
On-the- air comparison on November 7, 2011, with the monopole vs. my restricted space loop really floored me! The monopole was an honest 2 "s units" stronger on receive with all 3 stations (OH, IL and NC) I compared. I now know which antenna I'm using in the upcoming ARRL 10 Meter contest!
On 12 Meters (using ATU)
In a few hours I easily racked up: DH3, ES1, PA3, I7, SM5, ON4, 7, F4,
US5, UR6, UT1, VE2, 3, RW3, UA2, 4, IW6, OK1, CT1, EA3,4,8 etc. etc. plus
25 states! The band was in pretty good shape and many 5x9s were exchanged
both ways. What a hot little antenna on 10 and 12 meters!
Ps: DXing in the Caribbean is a tough job, but someone has to do it, hi hi!
Good luck and have fun antenna