Digital Links
As the digital communications revolution continues, new and varied digital modes become ever more popular. As with all electronic advancements in time the costs become a lot more attractive. For many of the popular digital modes, it is very easy to adapt your sound card to the transceiver and be up and running in very short order, WITHOUT a TNC. Links to some of the more popular digital modes are highlighted, and in some cases the links will take you to real time data. If you have a particular link that you think would be well represented here, please send an email to with the URL so it can be added.
APRS - Automated Packet Reporting System Introduction and the CanAPRS RealTime Map - Are 2 links that will fill in the blanks for APRS as well as give up to the minute status reports of APRS activity.
IRLP - (Internet Radio Linking Project) Introduction and the IRLP Active Node List - Form the IRLP website you will find answers to your IRLP questions, and the Active Node List is an up to the minute listing of Node status.
EchoLink - Introducing EchoLink and EchoLink Active Node List - These 2 sites are both informative and up to date.
SSTV - Slow Scan TeleVision Introduction and ARRL Technical SSTV Information Site come together to satisfy any SSTV hunger you may have.
SoundCard Packet - Introduction and Capabilities - Les has used WinPacket in conjunction with AGWPE in many instances from his lap-top and has found that the program works flawlessly. You can build your own interface cable for less than $10.00, and be on the air in no time. The same interface cable can also be used for a host of other amateur sound card program applications as well. Les uses a resistor for attenuation in place of the audio transformer as shown on the Interface Cable diagrams ( Tx Cable and Rx Cable) and has no trouble. In place of the opto-isolator used in the PTT cable, he used a simple 2N2222 switching transitor, however, he does not recommend this procedure unless you are willing to risk possible damage to your computer. Without the opto-isolator, you have no protection from voltage spikes back into your computer.
PSK-31 - A Handbook for PSK31 Users complete with transceiver to PC sound card interface diagrams.
HamScope - Amateur Radio Digital Communications Interface - HamScope is a multi-mode communications interface for amateur radio that supports PSK31, RTTY, CW, Packet and more.
Another SoundCard Interface - Communications Interface - by Cint Hurd. This design has been created for the amateur radio community to encourage more hams to enjoy the pleasures of the new sound card digital modes. This design is ideal for ham club construction projects and for the individual ham who likes to build his own equipment. The end result is a solid interface for use with sound card modes such as PSK31, MFSK16, RTTY, Hellschreiber, SSTV, Throb and CW.
Other Digital Links - RAC Digital Mode Collection Check this out for the hundreds of other Digital mode web sites. A check of this site is warranted. Here you will find relative information on just about any digital mode you might be interested in.
Interface Cables
- The Radio
to TNC wiring diagrams shown on this page represent more than 700 HAM Radio
transceiver models.
