EchoLink
It is software which allows Amateur Radio stations to communicate with one another over the Internet,
using voice-over-IP (VoIP) technology. The program allows worldwide connections to be made between stations,
from computer to repeater and link stations,
or from computer to computer.
There are more than 38,000 registered users worldwide!
For more information

Internet Radio Linking Project
The IRLP uses Voice-Over-IP (VoIP) custom software and hardware.
Coupled with the power of the Internet, IRLP will link your radio
site to the world.
IRLP operates a network of dedicated servers and nodes offering very
stable worldwide voice communications.
A note from Joe Ruby - KC7GHT
Hi,
I really enjoyed browsing your VVARA web site
www.vvara.org
It contains a lot of very
useful information.
I wanted to correct an error that I found. I believe your web page link to
my IRLP web site is incorrect.
As it should be:
http://sky.prohosting.com/wb7crk/sarc/irlp.shtml
Also my node number is 3820, instead of 382. We went to 4 digit node numbers
about a year ago.
There are now over 1252 IRLP nodes world wide. Each one of these nodes is a
amateur radio station.
I hope to see you at your meeting this Fall. I always enjoy visiting with you
guys.
Joe Ruby - KC7GHT
(Kilo Charlie 7 Going High Tech)
IRLP Node 3820, Phoenix, Arizona, USA
Uplink DTMF 3820, Downlink DTMF 73
http://sky.prohosting.com/wb7crk/sarc/irlp.shtml
http://www.irlp.net
http://www.ecso.com/jima/kc7ght.htm
http://www.qrz.com and search for KC7GHT
We can hit the IRLP node on Mt. Eldon from here easily.
It is a Northlink machine, on 448.875.
73 .... Mike K7NRA
For more information about
IRLP Internet Mode
Go To: www.irlp.net
Amateur Radio on the International Space Station
(ARISS)
You may communicate with the crew using voice, packet (computer) radio or television.
It all depends on what equipment the crew has in space.
Frequencies used for ARISS Call Sign is NA1SS
Voice Downlink: 145.80 (Worldwide)
Voice Uplink: 144.49 (Regions 2 & 3) 145.20 (Region 1)
Packet Uplink: 145.99 (Worldwide)
A typical ARISS ground station includes a 2-meter FM transceiver and 25-100 watts of output power.
A circularly polarized crossed-Yagi antenna capable of being pointed in both azimuth (N-S-E-W) and
elevation (degrees above the horizon) is desirable. But successful contacts have even been made with
verticals and ground plane antennas. Commercial and public domain software is available to help track
when a shuttle or the ISS will be in range of your station, and where to point your antenna.
For more details on assembling your station, you can buy a Satellite Handbook from ARRL.
ARISS Home Page
For more information and Frequently Ask Questions
Go Here
Science @ NASA
Spacecraft - Shuttle, Space Station, Hubble, Chandra, Weather Satellites, Amateur (HAM) Satellites,
Search and Rescue Satellites and more Go Here
OSCAR - Orbiting Satellite Carrying Amateur Radio.
For years, Amateur Radio operators have been using satellites to communicate over long distances, satisfying not
only their passion for communication
but also their interest in technical experimentation.
More than a dozen amateur satellites remain in orbit today.
"The successful launch of OSCAR 40 denotes the start of a new era in Amateur Radio," says Robin Haighton,
president of The Radio Amateur Satellite Corporation (AMSAT). AMSAT is an international group of volunteer
radio enthusiasts who share an interest in building, launching and communicating with each other via
Amateur Radio satellites. "Once more, Amateur radio operators will be at the leading edge of
experimentation in communications," says Haighton.
The term "OSCAR" stands for Orbiting Satellite Carrying Amateur Radio.
This satellite is the 40th in the OSCAR series, with began with the launch of
the first U.S. amateur satellite in 1961.
For more information on OSCAR Go Here
Amateur TV
Transmit and receive live action color AM TV in the 420-450 MHz Amateur band with the TC70-20S 20 Watt all in one box 70cm ATV Transceiver unit to other hams.
Any FCC Licensed Technician Class or higher Amateur Radio operator can transmit and receive live action color video and sound to other hams that looks and sounds just like commercial broadcast TV with our time proven equipment. Hams should be seen as well as heard.
Televise live or from tape your ham radio club meetings to those who could not make it in person.
o Show critical locations to local emergency service groups or back to the EOC during ARES & RACES drills or actual disasters, parades or races, etc.
o See Space Shuttle and ISS video and audio if some one is repeating it from their satellite TVRO.
o See the edge of space from amateur balloons or rockets as high as 100,000 ft.
o Getting a pilots view from a camera in a R/C model aircraft or real airplane, and much more.
For more infomation on Ham TV
Go Here
The above info is from
Tom (W6ORG) & Mary Ann (WB6YSS)
at P.C. Electronics
Slow Scan Television (SSTV)
One of the most fascinating yet often misunderstood and neglected facets of Amateur Radio.
Most people think it is poor quality black & white images using equipment costing kilobucks. That was true but it isn't anymore.
There are basically two methods used to send pictures over ham radio. Fast Scan TV is very similar to broadcast
TV: full motion color images. This requires a few megahertz of bandwidth so it is used only on UHF.
A single transmission is wider than the entire 2 meter ham band.
The other method is Slow Scan TV: still images sent through voice transceivers over a period of a few
seconds to a couple minutes. Early pictures were low resolution black and white. Now nearly all images
are higher resolution color.
For more infomation on SSTV for Ham Radio Go Here!
or Go Here!
Microphone History
¹ "Sir Charles Wheatstone in 1827 was the first person to use the term "microphone." The first microphone was a telephone
transmitter invented by Emile Berliner for Alexander Graham Bell in 1876. With the invention of the radio, new broadcasting
microphones were created. The carbon microphone was invented in 1878 by David Edward Hughes, and later developed in the 1920s.
The ribbon microphone was invented in 1942, for radio broadcasting.
During the 1970's, dynamic and condenser mics were developed,
allowing for a lower level
sensitivity and a clearer sound."
Want to know more from ¹About.com ?
Go Here
Telegraphy History
² "Telegraphy (in greek: writing in distance) is, as we know, a communication system able to transmit signals which represent coded letters,
numbers and signs of writing. Telegraphy has very ancient origins, and can be divided in acoustic, optical and electrical."
Want to know more from ²Alpcom.com.it ?
Go Here
