Antennas By N6LF

Antenna design ideas for radio amateurs by Rudy Severns N6LF

LF-MF antenna notes

For many months I've been working on a set of design notes LF-MF antennas intended for hams.  I think the present draft, while far from perfect, may be helpful to many amateurs.  For that reason I've posted the notes in their present form with the understanding they will be revised, probably several times, in the coming years. 

By all means let me know if I've forgotten something useful and, even more importantly, if I've made a mistake!  A lot of other peoples work is included but the mistakes are all mine!

GL and 73, Rudy N6LF, WD2XSH/20

LF-MF notes: 

Download Preface-Table of contents

Download Chapter 1  LF-MF overview

Download Chapter 2  Simple verticals w/o top-loading

Download Chapter 3   Top-loaded verticals

Download Chapter 4   Inductive loading and multiple tuning

Download Chapter 5  Ground systems

Download Chapter 6  Tuning inductor design

 

 

February 20, 2017 in 600m experiment , 630m antennas, Design of radial ground systems, Measurement of soil characteristics, Short antennas, Vertical array design ideas | Permalink | Comments (0)

630m Antenna Support Poles at N6LF

I have recently moved to a new QTH with several acres of clear farmland but no trees for antenna supports.  So I had to come up with a means to support a large 630m umbrella vertical and other experiments with wire antennas.  Here's what I did: Download Saginaw antenna support poles . 

August 14, 2013 in 600m experiment , 630m antennas, Short antennas, Vertical array design ideas | Permalink | Comments (0)

A large ID clamp-on RF current transformer

Earlier this year I posted a description of a simple clamp-on RF current transformer.  Since that time I have updated the design with a much larger ID and the core held in a spring-clamp that allows easy on/off in the field.  The following is an update of the earlier post: Download Current transformer 2 .  File size = 460 kB.

June 15, 2009 in Vertical array design ideas | Permalink | Comments (0)

Tower resonance measurements

I mentioned on the towertalk reflector that I had been trying to make accurate measurements of resonance in grounded towers with large antennas systems on them.  A number of people asked for the details.  So here they are: Download Some notes on measuring tower resonances .  These are only preliminary notes which give the general idea of what I'm about.  In due course they will be updated.

73, Rudy N6LF

February 12, 2009 in Vertical array design ideas | Permalink

About

Recent Posts

  • Snubbers for Electronic Circuits
  • New 630 transmitting antenna a WD2XSH/20
  • 630m-2200m talk
  • LF-MF antenna notes
  • The effect of insulation on wire antennas
  • Comments on the WD8DSB Bow-Tie RX
  • Universal curves for soil conductivity and permittivity
  • 160m-2200m receiving antenna
  • Experimental validation of NEC modeling for low and buried wires
  • Determination of Soil Characteristics Using a Low Dipole

Archives

  • December 2017
  • July 2017
  • April 2017
  • February 2017
  • December 2016
  • August 2016
  • July 2016
  • November 2015
  • October 2015
  • June 2015

Categories

  • 600m experiment
  • 630m antennas
  • ARRL antenna articles
  • Article supporting information
  • Design of radial ground systems
  • Introductory comments
  • Measurement of soil characteristics
  • MOSFET's
  • NEC modeling
  • Receiving antennas
  • Short antennas
  • Vertical array design ideas
See More