Skip to content

PD5DJ

Amateur Radio Station

Menu
  • Home
  • Info
    • Info
    • History
    • QSL Information
  • MiniBook
    • Handleiding MiniBook
    • MiniBook Guide
  • XLX880 Reflector
  • Activations / Contesting
    • Fieldday Juli 2th – 2017 with PD5TG
    • Mills on the air 2016
    • PI4WFL/KITE June 6th 2016
    • Handleiding MiniBook
    • PACC Contest PA6NH – 2015
    • VHF Contest 2006 – Petten
  • Projects
  • For Sale/Tekoop
  • Contact
Menu

New 5 Elements LFA for 2M

Posted on August 15, 2024January 17, 2025 by pd5dj
4.4
(8)

There has been a lot of ES propagation lately. With my Bigwheel antenna for 2m I can make very nice contacts.

Since the Bigwheel is approximately 5dBi, I wanted a little more gain and especially some forward gain.

I have known for a long time about the existence of LFA antennas from Justin G0KSC.

On his site there is a 5 element version with a gain of +/- 11dBi gain and a length of 1.8m.

https://g0ksc.co.uk/2013-yagis/144mhzs/144-lfa/5el-lfa.html

I immediately thought “that’s a nice size!”
I only had 1 challenge for my situation.
The Antenna had to be as light as possible.

The construction description mentions 10 mm and 12 mm diameter as tube/round.
If I were to use this, the antenna would become much heavy.

For the radiator I use 6mm tube with 4mm rod in it for the bends.
The 4mm rods have also been pressed so that they are super tight without screws.

I also use 4mm rods for all other elements.

All clamps, both element and mast clamps, are 3D printed from PETG material with 80% infill.

https://www.thingiverse.com/thing:6916404

 

I was surprised by the first measurements, super flat SWR with good coupling of all other elements.
And virtually the same result as with the specified dimensions in the original construction description.

As a first test I used a sub-optimal Choke BalUn, and the results are not bad at all!.

So the BalUn is the next thing I will tackle.
This will be a Pawsey Stub.

How useful was this post?

Click on a star to rate it!

Average rating 4.4 / 5. Vote count: 8

No votes so far! Be the first to rate this post.

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

 

Latest Posts

  • Tutorial : Yaesu bluetooth interface pairing in windows
  • YAESU Bluetooth Interface
  • Frame build for Yaesu FTdx10
  • Fieldday weekend and visit to PC5T on TEXEL EU-038
  • V Dipole 40m Expansion kit

Catagories

  • Accesoires
  • Amateur Television
  • Announcements
  • Antennas
  • Contesting
  • Digimodes
  • Events
  • Homebrew
  • Info
  • Logbooks
  • Measuring
  • MiniBook
  • Packet Radio
  • Portable
  • Projects
  • Propagation
  • Refurbishing
  • Satellite
  • Software
  • Uncategorized

Archives

  • October 2025
  • September 2025
  • August 2025
  • June 2025
  • May 2025
  • April 2025
  • March 2025
  • January 2025
  • November 2024
  • October 2024
  • September 2024
  • August 2024
  • July 2024
  • June 2024
  • May 2024
  • April 2024
  • March 2024
  • November 2023
  • October 2023
  • September 2023
  • August 2023
  • July 2023
  • June 2023
  • May 2023
  • April 2023
  • January 2023
  • December 2022
  • October 2022
  • August 2022
  • July 2022
  • June 2022
  • May 2022
  • April 2022
  • March 2022
  • August 2018
  • July 2018
  • June 2018
  • May 2018
  • April 2018
  • March 2018
  • December 2016
  • November 2016
© 2025 PD5DJ | Powered by Superbs Personal Blog theme