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Antenna Polarization [ ARRL PODCAST ]
Your antenna’s polarization can make a big difference in how well you can hear, and be heard — especially on VHF and up. Read more
WSJT-X 2.1.0 Description
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.
Antenna
Chameleon MPAS 2.0 Modular Portable Antenna System
“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 on Camano Island overlooking the Pacific
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
3 element 50MHz LFA-Q Super-Gainer Quad Style Yagi
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
Review
Chameleon MPAS 2 NVIS (Near Vertical Incidence Skywave) Antenna
“Part 2 of my look at the Chameleon MPAS 2.0 Modular Portable Antenna System. I set the antenna up in the horizontal NVIS (Near Vertical Inciden... Read more
Overview of the Icom IC-9700 SDR VHF/UHF Transceiver
Following on from our initial ‘Introduction to the IC-9700 VHF/UHF/1200 MHz Base Station SDR Transceiver’ video, we have put together a more in-depth,... Read more
RM Italy MLA100 Amplifier Demonstration
“Mark, W8BBQ show the RM Italy MLA100 amplifier to get over 100 watts from a QRP rig. 160 meters through 10 meters plus 6 meters. Allows you to... Read more
News
EME SSTV Lunar Landing Commemorative Event Set
Moonbounce enthusiasts are invited to take part in a commemorative Earth-Moon-Earth (EME) slow-scan television (SSTV) party on 23 centimeters, marking... Read more
Centenarian Radio Amateur’s Efforts Helped Pave the Way to the Moon
The Nashville Tennessean newspaper recently featured the story of a 104-year-old ARRL member who contributed to NASA’s effort to put the first humans... Read more
Award for Top Homebrew Designers in Amateur Radio Announced
The ICQ Podcast has announced a partnership to establish an annual “Homebrew Heroes Award” to recognize individuals, groups, or organizations that hel... Read more
Major WSJT-X Upgrade Boosts FT4 into “a Finished Protocol for HF Contesting”
The WSJT Development Group has announced the “general availability” release of WSJT-X version 2.1.0. This major upgrade formally introduces FT4 as a f... Read more
Digital Modes
New Summer EURAO Party to Premier FT4
The motto of the new European Radio Amateurs’ Organization (EURAO https://www.eurao.org/) Summer Party https://www.eurao.org/en/node/1045 is... Read more
World Wide Digi DX Contest
The World Wide Radio Operators Foundation (“WWROF”), in collaboration with the Slovenia Contest Club (“SCC”), is pleased to announce the first annual... Read more
LoTW Now Accepting FT4 Contact
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
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SDRuno v1.32 release ! Read more
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“We are pleased to announce the release of v1.32 of SDRuno. The purpose of this release is primarily to add MRC Diversity functionality for the RSPduo, but it also contains other fixes and additions based on customer feedback. Diversity functionality is described on P.78 of the SDRuno User Manual. A full list of the changes […] Read more
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The hard-working development team led by W1HKJ have announced the release of Fldigi v4.1.04. This maintaneance release of Fldigi brings several bug fixes, performance improvements and several new features.. As with all of the FL suite, Fldigi continues to support both PowerPC and Intel (i386) processors; with individual downloads available for each architecture and can be downloaded here Source: https://www.machamradio.com Read more
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Release notes Version 1.36.0 MAINTENANCE RELEASE Added support to QARTest direct QSO import in Log4OM Communicator (Inbound settings, default port is 9458) Added support to N1MM direct QSO import (UDP Broadgast -> CONTACT option in N1MM settings) in Log4OM Communicator (Inbound settings, default port 12060) Added new CAT mode in settings (Source: N1MM – selection: […] Read more
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“I was privileged to catch up with Mike, WA9PIE, from Ham Radio Deluxe at this year’s Texas Hamcom. He discusses some new features of his software, and some upcoming details also. I suspect we will be seeing more HRD videos on this channel soon. ” Read more
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“N6XI made a presentation to NCCC featuring the N1MM+ Spectrum Display. It covers why you would want to use a spectrum display and why it is better when it is integrated into the logging program. The link is to a pdf of his PowerPoint presentation” Read more
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Popular Amateur Radio contest logging software N1MM Logger+ has a new website. Changes include fewer pages, better search capability and bug/issue-tracking visibility and reporting, and a comprehensive, easier-to-use listing of all supported contests. The N1MM Logger+ online manual now consists of 31 web pages, reduced from the previous website’s 104. An expanded menu eases navigation to the desired page directly from […] Read more
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