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  • From the archive: Too much RF for the wrong frequency (4:1 balun, 400w 160m)
  • From the archive: Callum (M0MCX) running (years ago!)
  • From the archive: More field day antics running FT-1000MP and the Acom
  • From the archive: This is actually three separate dipoles connected to one feepoint
  • From the archive: Two radios on the cheap
  • From the archive: Obligatory evening shot of a three element 40m array
  • From the archive: How we got confused CQWPX 2008!
  • From the archive: Three antennas, left to right: 70cms, 2m and 6m, all at 10m AGL
  • From the archive: VHF Field Day 2008 M0XXT
  • From the archive: TS-2000 remote controller in my Merc
  • From the archive: "Taylor Made" keypad for TS-990s
  • From the archive: Aircell 7 PL259 connector
  • From the archive: 3 element 40m array aiming USA for 6db extra gain (over vertical)
  • From the archive: Kenwood TS-990s at M0MCX shack
  • From the archive: Typical stream-lined field day arrangement
  • From the archive: A3S on top of 3-section aluminium scaffold tubes experiement
  • From the archive: Scaffold tilt-over tower arrangement
  • From the archive: I've had a "mohawk" since 2007 :)
  • From the archive: Kenwood TS-990s
  • From the archive: 15m and 10m fan dipole arrangement test
  • From the archive: Old prototypes
  • From the archive: A3S Tribander (bottom), 40m 2-ele and 80m dipoles
  • From the archive: Single vertical with rainbow (SSB Field Day 2013)

  

2014 VPA

Poles are 9.6m in length. Rear reflector is mild helically wound to achieve extra 40cms
VPA beaming North West
Location of house -vs- Atlantic
Looking East from the front of the array
Obligatory evening photo of antennas
Acom showing great SWR and 400w CW
MFJ.. never seen such a good SWR (not actually a sign of efficiency)
Construction of feepoint base showing radials
Feedpoint and ground radial assembly
Parasitic feedpoints, showing temporary connector to measure SWR
Element can't touch the guying point for fear of flash-over
Guying system
3d-plot from MMANA
Comparison plots using MMANA modelling s/w
- none

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Now Shipping to UK EU Canada USA and AUS (ZL by arrangement)

Now Shipping to UK EU Canada USA and AUS (ZL by arrangement)

Library

  • DX Commander Short-Spike for ground stability – 3D Printing
  • 3.780 Lock Down Net Mon-Fri Daily
  • Phasing Harness Calulator for 71 and 84 degrees
  • Modelling a 2-element Delta Loop for 40m
  • How big is the DX Commander box?
  • DX Commander Lite Youtube Playlist
  • Simple Spreadsheet Contest Logger
  • Camdesk 1.2.1 Download
  • 1:1 Baluns. Myths, Facts and Fiction. How to build Ugly Baluns, Air Wound or Ferrite Chokes?
  • What is NVIS and why do you need a special aerial?
  • Fan Dipoles for Ham Radio Made Easy Overview How To
  • 40m Vertical Antenna – Phased Array or Vertical Yagi? Achieving MASSIVE gain on low bands
  • Best First Amateur Ham Radio HF Antenna for New Operators
  • My first Ham Radio HF Rig. How do I decide?
  • How to Live Stream your Ham Radio Club Station or Home Shack for Special Events and Contests
  • How to cause massive Ham Radio QRM with your ALC in Digi Modes
  • Fix local QRM & QRN in your home Amateur Radio Station in 10 minutes
  • How to Connect XLR 3 pin connector to your 8-Pin Radio
  • Ham Radio Antennas – Verticals or Dipoles – so what’s best?
  • Electrovoice RE20 unboxing ultimate ESSB microphone for ham radio
  • Heil Sound Ham Radio Pro 7 Headset Review
  • How to build a monoband HF Vertical Quarter Wave Ham Radio Antenna
  • Is a Dipole better than a Cobweb Antenna? Ham Radio Aerials.
  • How good is a G5RV and how do they work? Ham Radio Antennas.
  • Dual-Banding your 40m vertical for 15m. Good idea? Ham Radio Antennas
  • How to build an Inverted L for the low-bands (40m, 80m and 160m)
  • How to make a quarter-wave vertical mono-bander
  • How high should my dipole be?
  • What is the report for the IOTA contest
  • Quarter Wave -vs- 5/8ths Wave Vertical
  • 4-Element Home-Brew Folded Dipole Yagi Dimensions
  • Quick SWR Calculator for Vertical and Dipole Ham Radio Antennas
  • TOKYO HY-POWER HL-700B 600 Watt Amplifier purchase
  • Adding 80m to DX Commander All Band Vertical (9-bands 80m through 6m)
  • DX Commander Contest Antenna achieves top placed UK IOTA Station
  • Software Modelling your Vertical antenna ground radials with MMANA
  • DX Commander now shipping to USA / Canada / Aus
  • Vertical Antenna – How many Ground Mounted Radials Do I Need
  • M0MCX Banana Antenna – an end-fed choke sleeve resonant feedline T2LT antenna design
  • 20m band End-Fed Choked Coax Dipoles (T2LT)
  • 75 ohm to 50 ohm transmission line matching coax stub
  • JT65 UK Band Plan and how to stay within
  • 40m compact fan dipole for 40, 30 and 20m bands
  • Introduction to the 60m Band Plan (5 MHz)
  • 5.137 MHz 60m AM transmission test
  • DX Commander pre-production testing all-band vertical
  • Compact half-square for 40m band
  • Bidirectional switchable 40m wire yagi
  • How to use dual coax feeders as ladder line
  • Working 15m band on a 40m vertical antenna

Who is Callum M0MCX?

Callum lives near Solihull with his wife (Wendy) and two children. He owns an IT Recruitment Agency and is part owner of a web business.

Ham Radio Inspiration

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