Early Life and Education
Marconi held several positions in the Italian Army and Navy during World War I, starting the war as a lieutenant in 1914 and finishing as a naval commander. He was sent on diplomatic missions to the United States and France. After the war, Marconi began experimenting with basic short wave radio technology. On his beloved yacht, Elettra, he conducted experiments in the 1920s proving the efficacy of the “beam system” for long-distance communication. (The next step would lead to microwave transmission.) By 1926, Marconi’s “beam system” had been adopted by the British government as a design for international communication.
In addition to his groundbreaking research in wireless communication, Marconi was instrumental in establishing the British Broadcasting Company, formed in 1922. He was also involved in the development of radar.
WSJT-X implements communication protocols or “modes” called FT4, 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. FT4 and FT8 are operationally similar but use T/R cycles only 7.5 and 15 s long, respectively. 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.
“Chameleon Antennas recently updated their Modular Portable Antenna System or MPAS with the goal of it being the most versatile, high performanc... Read more
K7RL now fully remote on Camano Island overlooking the Pacific. 2EL 80M yagi just installed but not in this video #Exciting Signals into JA are bone-c... Read more
Product Dimensions and Weight Product Length: 25.0000M Product Widtg: 1.0280M A 3 element LFA-Q (Super-rigid Quad-style) Super-Light Quad Style Yagi f... Read more
10-40m Full bands coverage. 80m about 120Kc/s RF chocke for electrostatic protection. 2 KW pep SO239 Technical specifications: Height: 11.3 m approxim... Read more
LDMOS HF amplifier 90W input 2400W CW SSB output 1.8-54 MHz This a ready power amplifier. You will need a case and power supply only! Water-cooled h... Read more
“This band-exploration video looks at the amateur 2 meter band. We walk through the band. I talk about frequency coordination and band plans. I... Read more
Anytone D878UV Read more
Storm Emergency Traffic IARU HF Championship Contesters: The Hurricane Watch Net (HWN) is active on 14.325 MHz and 7.268 MHz in response to Category 1... Read more
Language in the Federal Aviation Administration (FAA) Reauthorization Act of 2018 will exclude all but a small number of Amateur Radio towers from mar... Read more
Responding to Tropical Storm Barry, the Hurricane Watch Net (HWN) and WX4NHC— the Amateur Radio station at the National Hurricane Center (NHC) in Miam... Read more
The World Wide Radio Operators Foundation (“WWROF”), in collaboration with the Slovenia Contest Club (“SCC”), is pleased to announce the first annual... Read more
The latest TQSL update (Config.xml version 11.8), released on May 22, includes FT4 as a submode of MFSK. It also adds AISAT-1 and PO-101 in the satell... Read more
Dave Bernstein reported this on the DXLabs support group today: ————————————... Read more
The organizer of contest is the Russian Digital Radio Club. The Russian contest on radio short waves communicationsRussian WW MultiMode Contest by using the BPSK63, CW, RTTY and SSB modes is... Read more
GigActiv GA3005 Ultra Wideband Frequenzy range : 9 kHz – 3 GHz Power Supply: 5,5V – 15V Gain: + 3dB Upper Frequency Limit (-1db): 3000 MHz IP3: > +30 dBm Typ. IP2: > +50 dB... Read more
DMR Mobile Radio 1.8” Graphic Dot-matrix True Color Display The large-sized, full color display enables the access to desired information easily even under bright sunlight. Date & clock... Read more
DL8MBS 2014-05-19 The Deutscher Amateur-Radio-Club (DARC) has the honor to invite amateurs all over the world to participate in the annual Worked All Germany Contest. Effective of May 2014 a... Read more
Download the .pdf File CW PY 2014 CW DX 2014 CLUBES 2014 SSB PY 2014 SSB DX 2014 Visit the oficial site: http://www.cvadx.org/ Read more
Enter a call sign and get immediately all the geographical informations (country, ITU zone, CQ zone, GMT). Google Play: https://play.google.com/store/apps/details?id=com.vincer... Read more
4 big monobanders on 1 boom, no traps !!! 3el on 40m / 4el on 20m / 4el wide spaced on 15m / 6el on 10m OptiBeam OB17-4 17 Element, 4 Band Bands 40 / 20 / 15 / 10 Ga... Read more
The Palstar SP30H ultimate communications speaker is a custom engineered speaker designed to match the sonic characteristics of the human voice. The “H” stands for both high qual... Read more
BAOFENG BF-888S Product Features and Technical Details Product Features 50 CTCSS/105 CDCSS/VOX Function Voice Prompt/PC Programming/voice scramble/encryption Emergency Alarm/Intelligent Char... Read more
Arizona QSO Party Rules 2014 Objective: Contact old friends, make new friends, and have fun! Join the party! Stations outside Arizona (AZ) contact as many AZ stations as possible. Arizona... Read more
Rotator Controller RT-21 Azimuth/Elevation Two separate control boards for independent Azimuth and Elevation New crisp OLED displays Separate Point-and-Shoot Knobs Free GH Tracker for automa... Read more
YAESU FT-8900R 29/50/144/430 MHz FM Transceiver The FT-8900R is a ruggedly-built, high quality Quad Band FM transceiver providing 50 Watts of power output on the 29/50/144 MHz Amateur bands,... Read more
As usual operations with Multi Operators, besides being more challenging bring along a frat party and long friendships. This time we had the following participants: PY2NDX (Rafa), PY2YU (Ton... Read more
Post your score during major contest Supported by: TR4W, Web-Post, N1MM, Win-Test, MixW, 5MContest, Referee, AATest, QARTest, WriteLog, UcxLog, SkookumLogger, DXLog.netUniversal Poster unipo... Read more
WSJT-X 2.1.0 Description
Antenna
Chameleon MPAS 2.0 Modular Portable Antenna System
K7RL on Camano Island overlooking the Pacific
3 element 50MHz LFA-Q Super-Gainer Quad Style Yagi
Vertical Antenna 8 bands trapped (10-12-15-17-20-30-40-80m) with wire radials 1/4 lambda for each one band.
Review
3. LDMOS HF AMPLIFIER 100W INPUT 2400W OUTPUT BLF188XR 2 PCS 1.8-54 MHZ
2 Meter Band Explorations
Anytone D878UV+ Handheld Radio
News
Clear Frequencies Requested for Storm Emergency Traffic
FAA Reauthorization Act Language Serves to Exclude Vast Majority of Amateur Radio Towers
HWN, WX4NHC at National Hurricane Center to Activate for Tropical Storm Barry
Digital Modes
World Wide Digi DX Contest
LoTW Now Accepting FT4 Contact
ADIF 3.1.0 was approved today
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