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Amateur Radio, Your PC and the Internet


The Internet Radio Linking Project What it is and its impact on Amateur Radio. ... Amateur Radio stations are operated for the purposes of self training in ... – PowerPoint PPT presentation

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Title: Amateur Radio, Your PC and the Internet

Amateur Radio, Your PC and the Internet
Presented by Tony Langdon, VK3JED
For the Melbourne PC Users Group, Dec 5 2001.
Topics of Discussion
  • Introduction
  • VK3JED and Amateur Radio
  • What is Amateur Radio?
  • Traditional Amateur Activities
  • IT and Amateur Radio
  • Monitoring Amateurs from your PC
  • Where to Listen
  • Receiving Amateurs for Yourself
  • The Internet Radio Linking Project What it is
    and its impact on Amateur Radio.
  • How to become a Radio Amateur
  • More Information WWW sites to follow up.
  • Demonstration of IRLP
  • Thank You

VK3JED and Amateur Radio
  • Licenced since 1989 as VK3JED
  • Active in the following areas
  • Internet Radio Linking (IRLP)
  • Satellites
  • Education and Publicity
  • Mobile and Portable Operation
  • Member of Moorabbin District Radio Club

What is Amateur Radio?
  • Amateur Radio stations are operated for the
    purposes of self training in radiocommunications,
    intercommunication using radiocommunications and
    technical investigation into radiocommunications
    by persons who
  • do so solely with a personal aim
  • have no pecuniary interest in the outcome of the
    operation of the station and
  • are operated on specified amateur frequencies
    or frequency bands...

Traditional Amateur Activities
  • HF (Shortwave) communication
  • Morse code
  • Analogue Voice
  • VHF/UHF repeaters
  • Radio Teletype (RTTY)
  • Homebrewing (construction)
  • Dxing (long distance contacts)

IT and Amateur Radio
  • Computer Controlled Modes
  • Packet Radio
  • Slow Scan TV
  • Narrow Band Teletype (PSK-31, etc)
  • Digital Signal Processing
  • Internet Radio Linking
  • Remote Bases and Web Radios
  • Internet Collaboration
  • Publicity

Monitoring Amateurs from your PC
  • Australian Amateur FAQ
  • http//
  • Remote Bases and Web Radios
  • W7DXX Remote Base http// (RA)
  • Lots of online receivers http//
  • IRLP - Internet Radio Linking Project
  • Reflector 2 Live Audio http//
  • There are many more online receivers on the

Example of a Web Receiver
Where to Listen
  • Amateur bands include
  • 1.8-2 MHz, 3.5-4 MHz, 7-7.3 MHz, 10.1-10.15 MHz,
    14-14.35 Mhz, 18.068-18.168 Mhz, 21 21.45 MHz,
    24.89 24.99 Mhz, 28-29.7 MHz, 50-54 MHz, 70-72
    MHz (UK only), 144-148 MHz, 220-224 MHz (North
    America only), 420-450 MHz. And many higher
    bands, up to 250 GHz.
  • Modes to Monitor (rough guide)
  • LSB below 10 MHz.
  • USB 10 - 29 MHz.
  • Try FM and USB above 29 MHz.

Receiving Amateurs for Yourself
  • Receivers
  • Shortwave receiver (0-30 MHz)
  • Must have BFO or SSB/CW facility
  • Digital tuning an advantage
  • Scanner for VHF/UHF
  • FM will do for most common activity, though SSB
    can be helpful
  • Computer
  • Any P100 or later running Win95 or later.
    Soundcard a must
  • Lots of freeware and shareware applications
    available for download off the Internet for
    accessory functions and decoding the newer
    computer based modes.
  • One of many sites with Amateur Radio DSP
  • http//

The Internet Radio Linking Project (IRLP)
  • Uses the Internet to link distant radio sites
  • Gives global coverage to normally localised VHF
    and UHF frequencies.
  • Enables minimally equipped stations to
    communicate globally.
  • Allows end user control of links via their radio.

How Internet Linking Works
Mobile Station
Radio Link
Distant Repeater
The Internet is used as a link
to connect distant repeaters together
Typical IRLP Node
  • Standard PC compatible is usually used.
  • Pentium P100 or faster.
  • Linux operating system.
  • Soundcard and appropriate drivers.
  • Simple hardware interface to control link radio.
  • Radio tuned to the appropriate link frequency.
  • ISDN/xDSL/cable/broadband Internet connection.

IRLP Reflectors
  • Enable multiple nodes to be linked together into
    a network number limited only by bandwidth.
  • Running a reflector requires very fast Internet
    access (32 kbps per connected node) to handle the
    multiple data streams. Most reflectors are
    hosted at Internet Service Providers who often
    donate the bandwidth.

Impact of IRLP on Amateur Radio and the Public
  • Level of amateur activity has increased
  • Amateurs who have been inactive for a long time
    are coming back on the air.
  • Amateur Radio is becoming more appealing to
    todays Internet oriented youth.
  • New opportunities for experimentation.
  • Global network to communicate with ISS

The Future
  • Internet linking is already becoming commonplace
    over 250 IRLP nodes on air.
  • Improvements in technology will improve
    performance of links.
  • IPV6 and multicast offer more flexible linking
    with less bandwidth.
  • Technology can be ported to high speed amateur
    microwave and satellite links.

How to Become a Radio Amateur
  • Radio amateurs are licenced by the ACA, once they
    pass required examinations in Amateur
    regulations, radio theory and optionally, Morse
  • Examinations are conducted privately or through
    radio clubs.
  • Many radio clubs run study courses for amateur
    theory and regulations. One on one tutoring,
    self study and study by email are other study
  • More information
  • Amateur information from the ACA
  • http//
  • Ron Bertrands online study course
  • http//

More Information
  • IRLP http//
  • Amateur Radio FAQ
  • http//
  • Online Receivers
  • http//
  • Software - http//
  • Moorabbin and District Radio Club
  • http//
  • WIA Victoria - http//
  • Wireless Institute of Australia
  • http//

Demonstration of IRLP
  • What you are listening to is streaming audio
    which originates from IRLP Reflector 2, which is
    the busiest IRLP reflector in the world.
  • The URL to listen is http//
  • Or alternatively, select the Listen Live! Link
    from http//

Thank You
Tony Langdon, VK3JED