Moxon Beam

I built a temporary Moxon beam based almost entirely on the article by Allen Baker, KG4JJH, from QST May 2003, The Black Widow — A Portable 15 Meter Beam. Another useful article is from QST June 2000, Having a Field Day with the Moxon Rectangle, by L.B. Cebik, W4RNL. The original article also references a separate website where drawings for the parts can be downloaded. This not only helped the effort greatly but boosted my confidence that I could actually build a successful antenna. I also note the August 2005 QST article by KG4JJH that described building a dual band, 17 and 12 meter, Moxon. A further reference is the Moxon Antenna Project

My thought in building this beam was to provide coverage to key areas during a contest weekend. In this case it covers 15 meters. It is pointed toward Europe in the mornings and Asia/Pacific in the afternoon with South America and Africa in between. During the contest day I also run my MA6V 20m to 6m vertical. During the evenings I run a HF2V for 80m and 40m.

I found the antenna to go together quite well and it did not need to be tuned. It has low SWR across the 15 meter band. The mast is a 24 foot painter pole that gets a bit wobbly, but is guyed by some nylon rope. The rotator is my arm. It works quite well in to Europe, Africa, and Asia/Pacific. It helped me work my first Japan QSO’s on QRP power levels in the VK/ZL contest earlier this year.

15 Meter Moxon Beam in Action

15 Meter Moxon Beam in Action

Moxon on top of the 20 foot painter pole extension

Moxon on top of the 20 foot painter pole extension

Moxon in the air --- note the PVC pipe that feeds the driven element with coax

Moxon in the air — note the PVC pipe that feeds the driven element with coax

Fishing poles glued to paint roller extensions, which mount into the Moxon center

Fishing poles glued to paint roller extensions, which mount into the Moxon center

Moxon fishing poles and mast, 2x4 assembly holds it up!

Moxon fishing poles and mast, 2×4 assembly holds it up!

Moxon center for coax feed and connection to mast

Moxon center for coax feed and connection to mast

Another view of the Moxon center

Another view of the Moxon center

Comments

  1. […] While I’ve looked at getting on some of the digital modes (setting up Cocoa Modem and listening in to some QSO’s), right now my only mode of transmission is CW or Morse Code. I enter the major CW contests, which is where I do most of my operating, and I watch the DX Clusters for CW contacts with new countries and new bands. Right now I’m at just over 170 countries confirmed on CW. This was done at 5 watts for the first 100 countries and now at 100 watts, all into verticals or on contest weekends into my 15 meter two-element Moxon beam. […]

  2. […] working on another temporary antenna for use in my city lot during contests. You’ll recall my Moxon Beam for 15 meters that’s done such a great job on that band. I’ve been looking for […]

  3. […] my first directional antenna, a 15 meter two-element Moxon. You can read my write up on the project here. A few months ago I spent some time building a Vee Beam, with that write up here. A key part of […]

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