Earth
The John Walsh Articles
The Measurement Of Earth Resisitance
Earth Image
The Importance Of A Good Earth At Low Frequencies
Monopoles and Earth Image
- Home
- Our Club
- Amateur Radio Training
- The John Welsh Collection
- John Welsh – Menu Map
- Introduction
- A Short History
- Historic Electronics
- Principles
- Analogies in Electricity Part 1
- Analogies In Electricity Part 2
- Scale; Some Numbers
- The Electron
- A Crystal Set
- Wire Baluns (Part One)
- Wire Baluns (Part Two)
- The ‘Q’ of a Tuned Circuit
- The Phase Locked Loop
- Units of Measurement
- The dB
- Transmitter Impedance
- Lead Acid Batteries
- The Microphone
- Thoughts on the Magnetic Field in a Toroid
- Componants
- Aerials
- Aerial Gain
- The Dipole
- Shortening the dipole – 1
- Shortening the dipole – 2
- Low Frequency Aerials
- Off Centre Fed Aerials
- Aerials for Circular Polarisation
- Loading of Aerials
- Traps In Aerials
- Wave Polarisation (Part 1)
- Wave Polorisation (Part 2)
- Monopole and Earth Image
- Aerials and their Q
- Radiation from a wire
- Feeders
- Earth
- Operating
- Other
- Atmospheric Attenuation
- The Impedance of Free Space (Part 1)
- The Impedance of Free Space (Part 2)
- The Impedance of Free Space (Part 3)
- The Impedance of Free Space (Part 4)
- Resistance of the Water Main
- Useful Filter for MF Listeners
- Ionospheric Refraction
- Extreme Radiation
- The Dimmer Switch
- “Wooden construction”
- SAQ
- Thoughts On The Moon
- Christmas Tree Lights
- Thoughts on the Magnetic Field in a Toroid
- Epitaph
- Contact
Twitter Feed
Archives
- October 2021
- June 2021
- May 2021
- April 2021
- March 2021
- January 2021
- September 2020
- June 2020
- May 2020
- March 2020
- November 2019
- July 2019
- May 2019
- April 2019
- March 2019
- November 2018
- July 2018
- June 2018
- February 2018
- December 2017
- September 2017
- August 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- July 2016
- June 2016
- February 2016
- January 2016
- December 2015
- November 2015
- September 2015
- August 2015
- July 2015
- June 2015
- April 2015
- March 2015
- February 2015
© 2022 Verulam Amateur Radio Club. All rights reserved. Theme by Solostream.
Connect
Connect with us on the following social media platforms.