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
New Book: Receiving Antennas for the Radio Amateur is Now Shipping!
ncrease your station’s receive performance with new book Receiving Antennas for the Radio Amateur by ARRL author Eric P. Nichols, KL7AJ. Althou... Read more
Five Band Indoor Magnetic Loop Aerial by G4IZH
This aerial covers the 20, 17, 15, 12 and 10 metre bands and is made from a single 3 metre length of 22 mm copper tube cut into 4 pieces of equal leng... Read more
Low Cost Magnetic Loop Antenna For 10-12 Meters
“I decided to build a magnetic loop antenna that would cover the ham radio frequencies from around 20 to 30 Mhz so I could use it on portable wi... Read more
Finding Annoying Power Line Noise – Ham Radio
Power Line Noise MFJ-5008 ULTRA-SONIC RECEIVER W/PARABOLIC REFLECTOR, 18~DIAHF and VHF operation can be affected by noise on the bands which mak... Read more
Antenna Gain Explained by KB9VBR
Check great article from KB9VBR – Antenna Gain Explained Also Visit J-Pole Antenna Shop Read more
Review
QCX+ the new QRP Labs 5W transceiver kit
QCX+: a feature-packed, high performance, single-band 5W CW transceiver kit, with WSPR beacon and built-in alignment/test equipment. Available for 80,... Read more
Fully Wireless ICOM IC-705 to Computer Connection for Digital Modes (WSJT-X, JS8Call, WinLink)
-The dream of completely wireless connection between radio and computer is a reality with Firmware 1.20 on the ICOM IC-705. I know have a few of my co... Read more
The Xiegu G90 (GSOC) remote head controller in development
Xiegu G90 (GSOC) remote head controller currently in development at the coding stage.. Read more
Review of MFJ’s New Xiegu X5105 HF QRP Deluxo
Review of MFJ’s newest radio. MFJ is the sole importer of the new Xiegu X5105 160m-6m QRP SSB/CW/AM/FM radio with built in rechargeable battery... Read more
Equipment
DX Engineering BRAND NEW Catalog
Autumn/Winter 2016 CQ DX! If you had an unlimited budget, how would you outfit your Dream Station? The DX Engineering team was hanging around the radi... Read more
HARDROCK-50 ATU Kit
HARDROCK-50 ATU Kit Additional functions: 60M band coverage. The ATU has a 60M lowpass filter which provides sufficient attenuation of harmonic... Read more
Icom releases the ID-52A/E Amateur Handheld Transceiver with Color Display and Bluetooth® Communication
Icom Incorporated (Headquarters: Hirano, Osaka, Japan/President: Masataka Harima) releases the ID-52A/E*, VHF/UHF dual band digital transceiver that s... Read more
Uniden SDS100 – Coming Soon
Uniden creates another first with the SDS100 True I/Q Scanner, the first scanner to incorporate Software Defined Radio technology to provide incredibl... Read more
Azuru HF + 6m Amplifier – HamFair 2017
Azuru Corporation is a booth of Hamfair 2017 at the company’s booth, HF (1.8 to 28 MHz band) + 50 MHz band linear amplifier “AZR – 5... Read more
News
The history of communicating with submarines underwater
“Nestled deep in the Chequamegon-Nicolet National Forest in Northwest Wisconsin is the small town of Clam Lake. Clam Lake is best known for the... Read more
K4BEN, announces the official beta of his Remote Radio Service
K4BEN, announces the official beta of his Remote Radio Service, DXRemote.net. It is a very simple concept: his enterprise-class, redundant n... Read more
New at ICOM Hamvention 2022!
ICOM Hamvention 2022! Take your contesting experience to the next level with the latest LDMOS power device with features supporting a SO2R operation i... Read more
AMSAT-UK announce the 2022 International Space Colloquium
AMSAT-UK is very happy to announce the 2022 AMSAT-UK International Space Colloquium will be held as part of the RSGB Convention on October 8-9 at the... Read more
ICOM will announce news at Hamvention
This morning Icom announced that it will have “new and exciting is on the horizon” during Dayton Hamvention 2022 Will it be a new HF or VH... Read more