In a post to the WSJT-X email group today, Joe Taylor K1JT hinted at some ongoing experimentation of a new digital mode with sub-modes. His post was a response to a question about a very early version of the weak signal WSPR mode (version 7) back in 2008. Back then, there was a facility for QSOs to be made between radio amateurs but it was later dropped. Joe included a link to an early Quick Start guide and background information that makes very interesting reading and is worth checking out! (link below)
Importantly, however, was the news that the brilliant development team behind WSJT-X is continuing with further experimentations in digital communications. There is no timeline or, indeed any indication that a new mode will see the light of day….but we certainly appreciate their energy and commitment to this fascinating aspect of the radio hobby.
Here’s Joe’s response in the WSJT-X group today:
It was a nice idea, from an experimenter’s point of view. The mode had WSPR sensitivity: we even made some easy EME QSOs with it! However, it never gained much popularity. QSO message formats are restricted enough, even with 72 or 77-bit payloads. Making 50-bit payloads serve for 2-way QSOs was probably too much of a stretch.
Your core development team enjoys pushing the communication-theory limits in whatever ways seem applicable to Amateur Radio. We are currently experimenting with a possible mode that would likely have many sub-modes: a wide range of T/R sequence lengths, perhaps 15 s to 5 minutes; occupied bandwidths from 60 Hz down to about 2 Hz; threshold sensitivities down to SNR = -37 dB for the longest T/R sequence lengths; and message formats suitable for both 2-way QSOs and WSPR-like applications.
No promises about when (or whether) such a mode might see the light of day.
— 73, Joe, K1JT
New from Astron is a 30-amp Power Supply with PowerPoles and 2 USB ports on the front panel. Let’s take a First Look at this! Connectors: [... Read more
Frank Arciuolo, W1ZAH, is having some problems with his antenna set up and SWR. Dave here to help point him in the right direction. Read more
Tim Desmond, KI5OUN, inspired this video on grounding. Simplest to say “Difficult Grounding Issues” Read more
Switching Power Supply, 30 A At 13.8 Vdc Peak Output, Front Panel Powerpoles, Fan Cooled, Meters, 115/230 Vac Input Int. Sw., Each Read more
“This video took me a few months to put together while testing it in different environments and locations. Today we are looking at the HamBuilde... Read more
AMSAT’s Engineering and Operations Teams have announced that AO-109 (RadFxSat-2/AMSAT Fox-1E) is now open for amateur use. AMSAT advises operators to... Read more
Radioddity has a new Mini Mobile DMR Radio about to be released which they are calling the DB-25-D. This is a small dual band DMR radio with 20W power... Read more
I show how I erect a simple VHF antenna on my RV. Read more
Today I go over the features and do some power testing on the Baofeng UV-10R Dual Band HT Ham Radio Specification: Brand Baofeng Power 10W Frequency V... Read more
The International Space Station crossband FM repeater should remain active until after the Field Day weekend of June 26-27. Amateur Radio on the Inter... Read more
Tad Cook, K7RA, Seattle, reports: Solar activity slowed this week, with the average daily sunspot number declining from 48.9 last week to 33.9 this we... Read more
WL2XUP is an FCC Part 5 Experimental station operated by Lin Holcomb, NI4Y, in Georgia. It’s licensed to operate with up to 400 W effective radiated p... Read more
“Chinese radios have come a long way, many have impressive feature lists, but those features seem to be stuck behind programming or poorly imple... Read more
“We are sorry to announce that Icom has discontinued the IC-7851 HF All Band Transceiver. Since its launch six years ago, the IC-7851 has been I... Read more
Russian cosmonauts on the International Space Station (ISS) are planning to transmit Slow Scan TV images on 145.800 MHz FM using the SSTV mode PD-120.... Read more
SDR Receiver demodulates and plays AM and FM signals received by an RTL-SDR, Airspy HF+ or SDRplay radio. Requires a radio and a host comput... Read more
The STARWAVES DRM SoftRadio allows you to conveniently enjoy any DRM live radio broadcast on your Android smartphone or tablet. No Internet connection... Read more
MagicSDR makes it possible to interactively explore RF spectrum using panadapter and waterfall visualization, demodulate and play AM, SSB, CW, NFM, WF... Read more
Marcus, DL8MRE announces that release of SmartSDR for iOS v3.9.12 is now available for download or update from the Apple App Store. SmartSDR is a full... Read more
There’s an incredible amount of radio signals. It’s impossible to know them all, let alone recognize them. So why not get help from Signal... Read more