WSJT-X 2.4.0 will introduce Q65, a digital protocol designed for minimal two-way QSOs over especially difficult propagation paths
On paths with Doppler spread more than a few Hz, the weak-signal performance of Q65 is the best among all WSJT-X modes. Q65 is particularly effective for tropospheric scatter, ionospheric scatter, and EME on VHF and higher bands, as well as other types of fast-fading signals.
Q65 uses 65-tone frequency-shift keying and builds on the demonstrated weak-signal strengths of QRA64, a mode introduced to WSJT-X in 2016. Q65 differs from QRA64 in the following important ways:
•A new low-rate Q-ary Repeat Accumulate code for forward error correction
•User messages and sequencing identical to those in FT4, FT8, FST4, and MSK144
•A unique tone for time and frequency synchronization. As with JT65, this “sync tone” is readilyvisible on the waterfall spectral display. Unlike JT65, synchronization and decoding are effective even when meteor pings or other short signal enhancements are present.
•Optional submodes with T/R sequence lengths 15, 30, 60, 120, and 300 s.
•A new, highly reliable list-decoding technique for messages that contain previously copied message fragments.
Read the new Q65 Quick Start Guide at
https://physics.princeton.edu/pulsar/k1jt/Q65_Quick_Start.pdf
SOURCE:http://www.southgatearc.org/
Antenna
How To Make a Doublet Antenna for Ham Radio – No Talking – ASMR style
How To Make a Doublet Antenna for Ham Radio – No Talking – ASMR style Read more
Cushcraft A4S Yagi Beam Triband 4 ele. 10,15,20M
Cushcraft A4S A4S Four Element Beam – 10, 15 & 20 Meters A4S is the true, high performance tribander. Precisely tuned high-power traps, c… Read more
Hybrid Double Quad Antenna 2m 2/HDQ5
HYBRID DOUBLE QUAD ANTENNA 2M Double quad antenna amateurradio 2m Antenna for Amateurradio, Hamradio 2m-band VHF (frequency 144.000 MHz – 146… Read more
Review
Review of The Sidekar, CW device for the KX3
“I’m startin’ the year with a long overdue review of the QRPworks Sidekar. A super portable CW appliance built for the KX3. Oh yeah,… Read more
SDRplay RSPduo Review by Mike Richards ( RadCom )
The new RSPduo from SDRplay was released at this year’s Hamvention in Dayton and provides a dual tuner SDR receiver. Each of the two tuners can operat… Read more
Equipment
Elecraft KX2 announced at the Dayton Hamvention 2016
Elecraft KX2 Hello to all, We are please to announce a new radio to complement the KX3 and the KX-Line. Here are the details. What: Elecraft announc… Read more
DX Engineering UT-KIT4 Complete Coax Cable Tool Kits DXE-UT-KIT4
DX Engineering DXE-UT-KIT4 Complete Coax Cable Tool Kits are cost-saving tool kits contained in a handsome, convenient carrying case. They are designe… Read more
Ham Radio Go Box Design
by Lee Drew “I’ve spent a lot of time over the years looking at the designs of ham radio go boxes amateur radio operators have created. T… Read more
News
FCC Reduces Proposed Amateur Radio Application Fee to $35
The FCC has agreed with ARRL and other commenters that its proposed $50 fee for certain amateur radio applications was “too high to account for the mi… Read more
New Zealand Adds Wireless Power Transfer (WPT) as Unlicensed Systems
New Zealand is putting wireless power transfer (WPT) systems using 148.5 kHz to 30 MHz into the General User Radio Licence for Short Range Device… Read more
Texas’ Biggest Ham Radio Show — Ham-Com — is Closing
After 41 years, Ham-Com has decided to close its doors due to the difficulties caused by the COVID-19 pandemic and the rising costs of putti… Read more
ARRL ARES Volunteers Standing By to Assist if Needed in Wake of Nashville Blast
ARRL Amateur Radio Emergency Service (ARES) volunteers remain ready to deploy in Williamson County, Tennessee, in the aftermath of an apparently inten… Read more
Solar Flux and Fast Wind Boost for the Holidays | Solar Storm Forecast 12.24.2020
Solar Flux and Fast Wind Boost for the Holidays | Solar Storm Forecast 12.24.2020 Read more
The post New WSJT mode Q65 appeared first on QRZ NOW – Ham Radio News.