W3KWH Echolink News:
Visitors to Pittsburgh wanting to connect to your home/club Echolink node can now do so through the W3KWH node.
To connect to a remote node via RF with your DTMF touchpad - press # nnnnn, where nnnnn is your home/club Echolink node number.
To disconnect from your remote node press # # .
EchoLink software allows licensed Amateur Radio stations to communicate
over the Internet using Voice-Over-Internet-Protocol (VOIP) technology. • • •
the Westell DSL Modem for EchoLink
The official EchoLink website is here.
Firewall / Internet Security Settings •
Most PC users today incorporate a "firewall" for security protection
when connected to the internet. While most contemporary firewall / security
software will recognize new software applications as they attempt to communicate
over the internet for the first time (presenting the user with an interactive
prompt to "permit" or "block" the
application's activities), many EchoLink users still have difficulty getting "connected" due
to their firewall / security settings -- often not realizing those settings
are causing the problem(s).
In addition to various security software packages, many modem / router
hardware devices require customizing, or allowing communications on specific
ports using specific protocols.
Click here to
go to a section on EchoLink's web site describing settings for the most
common firewall and internet security software and hardware configurations. If
you continue to have difficulty after having read through that section,
be sure to check out the EchoLink Troubleshooter Application and FAQs linked from that same page.
is a 620-KB PDF document recommended
by SCARC member, N3LL, who found it very helpful in dealing with broadband
modem / router issues and EchoLink.
EchoLink Usage Map
Two good PSK reference web sites include the PSK31"Official" Home
and K1VY's PSK31 Info Page
A plain text listing of various digital mode frequencies can be viewed here
Typical PSK Frequencies:
7035.15 for region 1 and region 3
7080.15 for region 2
- it's free!
Not free, but very nice all digital modes in one: MixW
All software requires a hardware interface between your rig and PC which
• Audio interface to/from your pc and rig;
• PTT function between rig and PC.
Here's one example
a typical rig interface; however, you can find many more using your favorite "search
engine" by searching with the terms psk
Check out this web-page
which is dedicated more to Icom, but very helpful in understanding interfacing.
Interfacing Radio with Personal Computer
| Uniface Interface: Pin-outs will need to
be adjusted when using the first example below. Its design provides
full optical isolation between the rig and PC. Click on
the left thumbnail for a full view of the schematic, and on the right
one for a full view of the components list.
The following are examples of hardware interfaces you can build for Icom
These are electrically the same. One looks more schematic-like,
while the other is more of a wiring diagram.
PC Software from Kingsmith Software
Generic ICOM Interface
IRC - Icom
W3KWH Interface Building