Jt65 spots how to#
Jt65 spots software#
Jt65 spots code#

Unlike more costly radios that provide a 50 ohm antenna jack, the DE1103 impedance varies from 1,000 ohms at 4 MHz to 200 ohms at 14 MHz. The DE1103 has an external 3.5 mm antenna jack on the side of the case for shortwave. The main thing is to get it up high and away from noise sources, like your PC. However, a long wire antenna placed as high as possible will work well even if it is not perfectly matched. Ideally, it should be a resonant antenna such as a dipole that is cut for the frequency range of interest. The single most important component of your setup is the antenna. This allows you to enjoy the hobby away from home. Its small size and battery operation make it easy to take on vacations along with your laptop PC. This model stabilizes in a few minutes, has a jack for an external antenna, has digital frequency readout, and a BFO (beat frequency oscillator) for receiving SSB signals. It can be found on the Internet for around $62 and works well in this application. One popular low cost receiver that fits the bill is a DEGEN Model DE1103 as shown in Figure 3. Many commercial or ham radios will do the job, but can be expensive. The basic requirements for your radio are that it be stable, have a numerical frequency readout, and receive SSB (single side band) signals. The good news is that most of it is free and can be downloaded from the Internet.

Jt65 spots software#

Several software packages will be discussed to help you get started. Then, to decode the audio, it is only a matter of selecting the right software for the mode of interest. If yours does not, you can add an inexpensive USB sound card to do the job. What makes this setup work nicely is that most PCs have sound cards that can accept the audio signals from the radio. Block diagram of shortwave data receiver. Figure 2 shows how the pieces fit together.ДЇIGURE 2. Then, the sound is analyzed using audio decoders in the PC software. That is, the radio signals are first converted to audio signals using your radio receiver. One of the things that all of these modes have in common is that they are audio modes. To convey images and graphics, commercial stations use radio-facsimile (FAX), while amateur stations use slow scan TV (SSTV) and EasyPal. Text messages are usually conveyed with these protocols. These modes - developed by amateur radio operators - use low power and complex coding, and allow communication over great distances. Some of the popular newer modes are Binary Phase Shift Keying (BPSK), Weak Signal Propagation Reporter (WSPR), and the weak signal digital modes JT65/9.

Jt65 spots code#

Some are as simple as Morse code (CW) or Radio-teletype (RTTY), while others are more sophisticated such as AMTOR or SITOR which are similar to RTTY.

Jt65 spots how to#

In this article, I will show you how to use a low cost ($62) shortwave radio to get you started in this exciting hobby.Дata transmissions vary in complexity and contain a wide variety of information. If you are connected to the Internet, your radio receptions can be reported to websites like, , and others where they will be displayed on a world map such as PSK Reporter as shown in the lead photo. As amazing as it seems, many of these data signals can be picked up and decoded at home using just a low cost shortwave receiver, your PC, and some specialized software. Digging a bit deeper, there is another world of shortwave radio that does not use conventional sounds. Listening to shortwave radio is very interesting, and filled with the voices and music of far-off lands.