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WSJT-X implements communication protocols or "modes" called FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR, as well as one called Echo for detecting and measuring your own radio signals reflected from the Moon. These modes were all designed for making reliable, confirmed QSOs under extreme weak-signal conditions.

JT4, JT9, JT65, and QRA64 use nearly identical message structure and source encoding (the efficient compression of standard messages used for minimal QSOs). They use timed 60-second T/R sequences synchronized with UTC. JT65 and QRA64 were designed for EME ("moonbounce") on the VHF/UHF bands; JT65 has also proved popular and effective for worldwide QRP communication at HF. JT9 is optimized for the LF, MF, and HF bands. It is about 2 dB more sensitive than JT65 while using less than 10% of the bandwidth. With either JT9 or JT65, world-wide QSOs are possible with power levels of a few watts and compromise antennas. JT4 and QRA64 are optimized for EME on the VHF and higher bands, and especially the microwave bands from 2.3 to 24 GHz.

FT8 is operationally similar but uses T/R cycles only 15 s long. MSK144 is designed for Meteor Scatter on the VHF bands. These modes offer enhanced message formats with support for nonstandard callsigns and some popular contests.

As described more fully on its own page, WSPR mode implements a protocol designed for probing potential propagation paths with low-power transmissions. WSPR is now fully implemented within WSJT-X, including programmable "band-hopping".

We supply a variety of accessories for amateur and professional transceivers, including programming and CAT cables, linear switching cables, microphones and much more.

We have over 35 years experience in amateur radio, communications and IT and have thousands of satisfied customers worldwide.
Our in-house products are developed and produced to our exacting specification from the best quality components, then each one is individually tested.
Everything we sell must meet our very high quality standards.
You have all our technical expertise at your disposal if you need help or advice.
Our USB cables use the very reliable and well-supported SiLabs CP2102 chipset or the highly regarded FTDI FT232RL and work with all major operating systems.

ura gratuita, principalmente para entusiastas de DXers y IOTA. En realidad, es un recurso que la mayoría de los otros medios de comunicación de DX utilizan y estamos orgullosos de no cobrarle a nadie un solo centavo por leer. Nuestro cometido es bastante simple: publicar noticias y fragmentos de DX para todos sin ningún compromiso.

Fabricación de amplificadores transistorizados.

HDSDR is a freeware Software Defined Radio (SDR) program for Microsoft Windows 2000/XP/Vista/7/8/8.1/10.

Typical applications are Radio listening, Ham Radio, SWL, Radio Astronomy, NDB-hunting and Spectrum analysis.

HDSDR (former WinradHD) is an advanced version of Winrad, written by Alberto di Bene (I2PHD).