Verulam Amateur Radio Club
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      • Did Marconi really hear those Transatlantic signals?
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A Short History

The John Walsh Articles

    Earliest Times
    Late 19th Early 20th Century
    Early Last Century
    Did Marconi really hear those Transatlantic signals?
    The Tuned Spark Transmitter
    The Coming of the Diode
    The Triode, the start of modern electronics

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Verulam Amateur Radio Club

  • Home
    • Welcome
    • What Is Amateur Radio
  • Our Club
    • History
    • Meetings
    • Contesting
    • Club Nets
    • Facilities
    • Events
    • Blog
  • Amateur Radio Training
    • The Foundation Course
  • Contact
    • Site Map
  • The John Welsh Collection
  • 2018 Contest Report
  • The Dipole
  • Aerials
  • Aerial Gain
  • Baluns
  • Operating
  • Aerial Feeders
  • John Welsh – Menu Map
  • Aerials for Circular Polarisation
  • Earth Image
  • Earth
  • A Short History of Radio Part 1
  • The importance of a good Earth at the Lower Frequencies.
  • A Short History
  • A Short History Of Radio Part II
  • Off Centre Fed Aerials
  • A Short History of Radio (Part lll)
  • Analogies in Electricity Part 1
  • Principles
  • A Short History of Radio Part IV
  • Analogies In Electricity Part 2
  • A Short History of Radio (Part V)
  • Transmission Lines
  • A Short History of Radio (Part VI)
  • Lead Acid Batteries
  • A Short History of Radio (Part Vll)
  • The Microphone
  • Christmas Tree Lights
  • Thoughts On The Moon
  • Christmas and Other
  • The Evolution Of Morse Code In Radio Science
  • The Thermionic Diode
  • Slow Morse (Part 1)
  • Inductors
  • QRSS – Noise (Part 2)
  • QRSS (Part 3)
  • Capacitors (Part 1)
  • Capacitors (Part 2)
  • Coax – Does Size Matter?
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