This weekend, Shortwave Radiogram will again try some Russian text. So far we have not been able to convince any of the international news organizations that provide content in Russian to transmit text via shortwave on a regular basis. A… Leer más ›
MSFK64
Shortwave Radiogram, del 23 al 28 de Junio: programa 260
Greetings and good luck to radio amateurs in North America who will be participating in the ARRL Field Day event, June 25 and 26. Let’s hope both space weather and terrestrial weather cooperate for everyone taking part in Field Day…. Leer más ›
Shortwave Radiogram, del 16 al 21 de Junio: programa 259
Unrelated to Shortwave Radiogram, we had some excitement the early morning of June 14. About 3:00 am, I heard a commotion in the house. It involved our cat Ollie. He was chasing a moth, I assumed. Gazing into the darkness:… Leer más ›
Shortwave Radiogram, del 9 al 14 de Junio: programa 258
One or more of the WINB transmissions might begin with the text “Welcome to program 186 of Shortwave Radiogram.” The show actually is program 258. This error will not appear in the WRMI transmissions. The repeat broadcast last weekend is… Leer más ›
Shortwave Radiogram, del 26 de Mayo al 7 de Junio: programa 257
Due to family activities (again), Shortwave Radiogram program 257 will be broadcast 26-31 May 2022 and repeated 2-7 June. Because of the complexity of uploading the programs to WINB and WRMI, the easiest solution in these situations to repeat a show from… Leer más ›
Shortwave Radiogram, del 19 al 24 Mayo: programa 256
This weekend, we in the northeast USA will get our first taste of hot weather. Temperatures will be in the mid-90s F, or about 35C. We will quickly find out if our air conditioning keeps the radios and PCs cool… Leer más ›
Shortwave Radiogram, del 12 al 17 Mayo: programa 255
We return to a new, non-repeat show this weekend. Thanks to Mitch @Plano26 and Al @WD4AH_Al for monitoring the @SWRadiogram Twitter account last weekend. A video of Shortwave Radiogram, program 254, is provided by Scott in Ontario (29 April, 1300 UTC). The… Leer más ›
Shortwave Radiogram, del 6 al 10 Mayo: programa 254
This weekend’s program (254) will be repeated the following weekend (May 5-10). I will not send the usual weekly email reminder on May 5. Apologies for the missing Shortwave Radiograms that past two Fridays at 1300-1330 UTC on 15770 kHz…. Leer más ›
Shortwave Radiogram, 28 de Abril y 10 de Mayo: programa 254
This weekend’s program (254) will be repeated the following weekend (May 5-10). I will not send the usual weekly email reminder on May 5. Apologies for the missing Shortwave Radiograms that past two Fridays at 1300-1330 UTC on 15770 kHz…. Leer más ›
Shortwave Radiogram, del 21 al 26 de Abril: programa 253
There were mishaps last weekend with the Friday broadcast. The 1300-1330 UTC transmission was occupied by Brother Stair due to a mistaken entry in WRMI’s automation system. And the 1500-1530 UTC DRM transmission from WINB Pennsylvania on 15750 kHz also… Leer más ›
Shortwave Radiogram, del 14 al 19 de Abril: programa 252
The Greek government has decided to delay the decision to eliminate shortwave broadcasting from March 31 or May 31. To help the Greek government in its decision, last week Shortwave Radiogram transmitted Greek text, as a demonstration of radio as… Leer más ›
Shortwave Radiogram, del 7 al 12 de Abril: programa 251
If you have not done so already, please note the new transmission schedule of Shortwave Radiogram, which is listed below. We are no longer broadcasting Saturday 1330-1400 UTC. And the “red-eye” show has been moved from Sunday to Monday, same… Leer más ›
Shortwave Radiogram, del 31 de Marzo al 2 de Abril: programa 250
As if last weekend were not confusing enough, with the beginning of the A22 shortwave frequency season, and the European time change, we were surprised by some last-minute changes to WRMI’s times for Shortwave Radiogram. WRMI now has a customer… Leer más ›
Shortwave Radiogram, del 24 al 27 de Marzo: programa 249
This will be complex weekend. On March 27, most of Europe turns clocks ahead for Summer Time. And, same date, the A22 shortwave frequency season begins. Most Shortwave Radiogram frequencies stay with UTC, so for most Europeans, the show will… Leer más ›
Shortwave Radiogram, del 17 al 20 de Marzo: programa 248
This weekend, in North America, the transition to Daylight Savings Time is complete. Political sentiment in North America is in favor of year-round Daylight Time. This would end these confusing weekends. (Although I would prefer year-round standard time.) All of… Leer más ›
Shortwave Radiogram, del 11 al 13 de Marzo: programa 247
The time change process begins this weekend. Most people in North America will move their clocks forward at 0200 local on March 13. For VOA Radiogram, this means Sunday transmissions on WRMI will be one hour later by local time… Leer más ›
Shortwave Radiogram, del 4 al 6 de Marzo: programa 246
Shortwave is in the news. Russia is blocking or restricting news organizations that depend on internet-based media. In Ukraine, news via the internet is increasingly unavailable due to destruction of infrastructure. Radio is attempting to fill filling the gaps, including… Leer más ›
Shortwave Radiogram, del 25 al 27 de Febrero: programa 245
Now that Russia has commenced hostilities against Ukraine, media and communications in, from and to the region will be interesting to observe. The SDRs in eastern Europe have been busy today. We can expect internet disruptions, which should create some… Leer más ›
Shortwave Radiogram, del 18 al 20 de Febrero: programa 244
The 80th anniversary of the Voice of America is celebrated this month. An amateur radio radio special event will take place this weekend, February 19 and 20, involving three stations: W3V at or near the VOA headquarters in Washington. W8O… Leer más ›
Shortwave Radiogram, del 11 al 13 de Febrero: programa 243
Thank you if you tuned in and decoded last weekend’s Ukrainian text, even, if like most of us you have no Ukrainian. The highlight was a 100% decode of the Ukrainian text as received by an SDR in Ukraine. This… Leer más ›
Shortwave Radiogram, del 4 al 6 de Febrero: programa 242
An excellent video describing Shortwave Radiogram is now available at the Tech Minds YouTube account. Thank you Tech Minds! If you tune in the WINB broadcasts, at least the first one Friday at 0030 UTC, you will see it starts with the… Leer más ›
Shortwave Radiogram, del 28 al 30 de Enero: programa 241
The NASWA Winter SWL Fest will take place March 4 and 5, 2022. This annual meeting covers all aspects of the radio listening hobbies, on all frequencies. This year, again, it will be virtual, via Zoom, due to the pandemic. Information at swlfest.com…. Leer más ›
Shortwave Radiogram, del 21 al 23 de Enero: programa 240
For days, the weather forecasters were warning us that two inches of snow would arrive here in the Washington DC area during the Thursday morning commute. Two inches may not seem like much if your are used to real snowfalls,… Leer más ›
Shortwave Radiogram, del 14 al 16 de Enero: programa 239
Another shortwave program is transmitting text and images. Pop Shop Radio from Hope, British Columbia, is including some MFSK32 text in each show. I have added their schedule and contact information to the list below. Please encourage other shortwave broadcasters to try… Leer más ›
Shortwave Radiogram, del 7 al 9 de Enero: programa 238
You may have read about the snow in the Washington DC area. The heavy wet snow on January 3, with additional freezing after dark, left many vehicles stranded on Interstate 95, the main highway south of Washington, some for 24… Leer más ›
Shortwave Radiogram, del 31 de Diciembre 2021 al 2 de Enero 2022: programa 237
Happy New Year! And thanks for tuning in, decoding, reporting, and keeping in touch in 2021. Last week I was surprised to learn that Shortwave Radiogram has a new, additional transmission, Tuesdays at 1530-1600 UTC on 9955 kHz from WRMI… Leer más ›
Shortwave Radiogram, del 24 al 26 de Diciembre 2021: programa 236
Merry Christmas, if you are celebrating. And no matter what you might be celebrating this weekend, try to tune in to an unusually festive edition of Shortwave Radiogram.There will be 18 images in MFSK. Each one will be the same… Leer más ›
Shortwave Radiogram, del 17 al 19 de Diciembre 2021: programa 235
I hope you are enjoying the holiday season. Eight of our nine images this weekend will feature the lights of the season, in various parts of the world. It is now the time of year that our Sunday 0800-0830 UTC… Leer más ›
Shortwave Radiogram, del 10 al 12 de Diciembre 2021: programa 234
The autumn leaves have almost all fallen here. The leaves have been raked to the street, where the county vacuum truck will pick them up eventually. That’s the event that indicates the winter has arrived in our neighborhood. At least… Leer más ›
Shortwave Radiogram, del 3 al 5 de Diciembre 2021: programa 233
Apologies to those of you tuned in last Saturday at 1330 UTC on 15770 kHz. You were detecting a carrier but heard no audio of Shortwave Radiogram or anything else (until 1400 UTC). Jeff White at WRMI responded to my… Leer más ›
Shortwave Radiogram, del 26 al 28 de Noviembre 2021: programa 232
Happy Thanksgiving to listeners in the United States. No Thanksgiving is complete without tuning in and decoding Shortwave Radiogram. You can do this Friday at 0030-0100 UTC (Thursday 1930 EST, 1830 CST, 1730 MST, 1630 PST) on 9265 kHz from… Leer más ›
Shortwave Radiogram, del 19 al 21 de Noviembre 2021: programa 231
One more reminder that WRMI (on its frequencies used for Shortwave Radiogram) has, since the North American time changed, stayed with UTC for its program schedule. So, for most of Europe and North America, Shortwave Radiogram is one hour earlier… Leer más ›
Shortwave Radiogram, del 12 al 14 de Noviembre 2021: programa 230
The autumn (Northern Hemisphere) time changes are now complete. The WRMI schedule on the frequencies used for Shortwave Radiogram stays with UTC, so the local time will be one hour earlier. WINB’s schedule stays with Eastern Time, so local times… Leer más ›
Shortwave Radiogram, del 4 al 7 de Noviembre 2021: programa 229
Most of North America will move clocks back one hour on November 7. Europe did its time change last weekend. (One of our news item this week is about what we in North America call “daylight saving time.”) On the… Leer más ›
Shortwave Radiogram, del 28 al 31 de Octubre 2021: programa 228
If you are participating in Halloween festivities this weekend, have a good a safe time. This weekend, most of Europe will change clocks back one hour. This Sunday (31 October), transmissions via WRMI will be one hour earlier by European… Leer más ›
Shortwave Radiogram, del 21 al 24 de Octubre 2021: programa 227
This weekend’s Shortwave Radiogram was almost a replay of last week’s Shortwave Radiogram. The hard disk drive on my PC is in the process of failing, working only intermittently, and triggering “S.M.A.R.T. status bad” warnings on boot-up. Fortunately, Windows 10… Leer más ›
Shortwave Radiogram, del 14 al 17 de Octubre 2021: programa 226
While searching for images to use on this weekend’s show, there were certainly plenty of photos of brilliant auroras that occurred on October 11. They were spurred by a solar storm that might have affected your radio reception during the… Leer más ›
Shortwave Radiogram, del 7 al 10 de Octubre 2021: programa 225
If you enjoy decoding images, we will transmit eleven MFSK64 images this weekend. And with shortwave conditions improving, many of these images may look good after you receive them. A video of last weekend’s Shortwave Radiogram (program 224, Friday 1300… Leer más ›
Shortwave Radiogram, del 30 de Septiembre al 3 de Octubre 2021: programa 224
The Vienna Wireless Society, the amateur radio club in Vienna, Virginia, near Washington DC, kindly invited me to speak to their meeting on September 24 about Shortwave Radiogram, including its history, goals and great audience. A video of that presentation… Leer más ›
Shortwave Radiogram, del 23 al 26 de Septiembre 2021: programa 223
Autumn has officially begun. October is almost here. Among other changes in the air, shortwave propagation is shifting. Try Shortwave Radiogram times and frequencies that you haven’t tuned in recently. Videos of last weekend’s Shortwave Radiogram (program 222) are provided… Leer más ›
Shortwave Radiogram, del 16 al 19 de Septiembre 2021: programa 222
As I type this, our part of northern Virginia is under a flash flood warning. And thunder is rumbling. I should finish this email quickly, because it does not take much around here to bring about a power failure. A… Leer más ›
Shortwave Radiogram, del 9 al 12 de Septiembre 2021: programa 221
In last week’s email, I forgot to note the new “winter” frequency of The Mighty KBC, now on 5960 kHz from a transmitter in Germany, Sundays 0000-0200 UTC (Saturday 8 to 10 pm EDT). In addition to the great mix of oldies… Leer más ›
Shortwave Radiogram, del 2 al 5 de Septiembre 2021: programa 220
I hope that everyone is OK after Hurricane Ida and its remnants. We hope electricity and other elements of normalcy are restored to Louisiana as soon as possible, although it may take days or weeks. Here in northern Virginia, we… Leer más ›
Shortwave Radiogram, del 26 al 29 de Agosto 2021: programa 219
Between interesting solar conditions and thunderstorms lurking, at least here in North America, it could be an interesting weekend for receiving and decoding the modes on Shortwave Radiogram. A video of last weekend’s Shortwave Radiogram (program 218, Friday 1300 UTC)… Leer más ›
Shortwave Radiogram, del 19 al 22 de Agosto 2021: programa 218
I had to cancel the OFDM-500F transmission planned for this weekend. The mode would not decode correctly from the recordings – both the mp3 and the original Audacity recording. This was a sign that the OFDM-500F would not decode successfully… Leer más ›
Shortwave Radiogram, del 5 al 8 de Agosto 2021: programa 216
Here in the Washington DC area, we have been experiencing a few days or weather that is not too hot and not too humid – very unusual for this time of year. As I type this, I can feel the… Leer más ›
Shortwave Radiogram, 29 de Julio al 1 de Agosto 2021: programa 215
This reminder that you can see results, including decoded images, of Shortwave Radiogram listeners at the Twitter account @SWRadiogram. If you are not on Twitter, you can visit http://twitter.com/swradiogram and scroll down. A video of last weekend’s Shortwave Radiogram (program 214, Friday… Leer más ›
Shortwave Radiogram, 22 al 25 de Julio 2021: programa 214
Last weekend’s broadcast (program 213) ended with the painting “Usonian View” by Michelle Lewis. Here is the painting as received by Pete Brunelli in Rhode Island, as included in Pete’s blog post about last weekend’s show … I selected this painting because… Leer más ›
Shortwave Radiogram, 15 al 18 de Julio 2021: programa 213
Thanks to everyone who reported on last week’s test of gaps and no gaps before the image headers. No prominent pattern emerged during my first look at the results, but I need to do a more systematic analysis. My usual… Leer más ›
Shortwave Radiogram, 8 al 11 de Julio 2021: programa 212
Last week (program 211), at the suggestion of Tobias in Germany, we eliminated the short (about 0.6 second) gap between the text introduction and the image itself. This seemed to result in fewer failed image due to missed headers. Why… Leer más ›
Shortwave Radiogram, 1 al 4 de Julio 2021: programa 211
Shortwave Radiogram listeners have kindly offered suggestions for experiments with our digital modes. Tobias in Germany suggests that eliminating the brief silence (about 0.6 second). between the text introduction of an MFSK image and the image transmission, can reduce or… Leer más ›
Shortwave Radiogram, 24 al 27 de Junio 2021: programa 210
If you are participating in amateur radio’s Field Day this weekend, enjoy the event and good luck in the contest. The only Shortwave Radiogram during Field Day operating hours is Sunday 0800-0830 UTC on 5850 and 7730 kHz. Tune in… Leer más ›
Shortwave Radiogram, 17 al 20 de Junio 2021: programa 209
We can claim success with last week’s transmission of Russian, especially because it was received successfully via SDRs in Russia. This was during two transmissions, including Sunday 2330. Videos of last weekend’s Shortwave Radiogram (program 208) are provided by Scott in Ontario (Friday… Leer más ›
Shortwave Radiogram, 10 al 13 de Junio 2021: programa 208
This week, after months of planning, preparation, and purchases, three new amateur radio antennas were installed on my roof. They are 1) a 10 and 6 meter vertical, 21 feet (6.4 M) tall, 2) a homebrew 10 and 6 meter… Leer más ›
Shortwave Radiogram, 3 al 6 de Junio 2021: programa 207
One change to our transmission schedule take effect this weekend: The Saturday (Friday in the Americas) broadcast at 0000-0030 UTC on 9955 kHz is no longer available. We hope we can return to 9955 in the future, because this frequency… Leer más ›
Shortwave Radiogram, 27 al 30 Mayo 2021: programa 206
This weekend we will finally transmit a photo of a cicada. The present brood of the 17-year cicadas, and their wonderful sound, won’t be around much longer. And I probably won’t be around for their next appearance, so I am… Leer más ›
Shortwave Radiogram, 20-23 Mayo 2021: programa 205
Reception in Europe was rather challenging last week, and during recent weeks, both on 15770 and 7780 kHz. Otherwise, results were good from most part of the world. Our Spanish-language news item decoded well in South Australia, Japan, Alaska and… Leer más ›
Shortwave Radiogram, 13-16 Mayo 2021: Se habla español, programa 204
Shortwave Radiogram received some publicity on the May 7th edition of Amateur Radio Newsline. The audio and text are available here and the video version here. Thanks to Benn Kobb, AK4AV, for presenting the report. Videos of last weekend’s Shortwave Radiogram (program 203)… Leer más ›
Shortwave Radiogram, del 6 al 9 de Mayo 2021, programa 203
If you read this soon enough, you might be able to receive and decode SSTV (Robot36) transmissions on shortwave (HF) in the narrow FM mode from a site in Russia. These will take place May 7 at 0800-0900 and 1300-1400… Leer más ›
Shortwave Radiogram, 29 de Abril al 2 de Mayo 2021, programa 202
Our first round of experiments with HamDRM is now complete. Thanks to Daz Man in Australia for converting our program 200 to HamDRM. When it succeeded, the result was the text of the program in html, with perfect images embedded. DRM is fussy about the quality… Leer más ›
Shortwave Radiogram, 22 al 25 de Abril 2021, programa 201
I hope you are not exhausted from last weekend’s celebration of the 200th program of the Shortwave Radiogram series. Thanks for tuning in and decoding our somewhat special program. A very interesting addition to program 200 is a special Ham-DRM… Leer más ›
Shortwave Radiogram, 15 al 18 de Abril 2021, programa 200
So this weekend we reach the milestone – or kilometrestone – of 200 programs. Thank you for tuning in and decoding, for your reports and interest. These have kept Shortwave Radiogram going since it succeeded VOA Radiogram in the summer… Leer más ›
Shortwave Radiogram, 8 al 11 de Abril 2021, programa 199
Last week’s experiment with text in the Burmese languages went well. It seems the Burmese was decoded successfully just about everywhere – except Myanmar. But, then, we don’t have any transmitters with good reception in Southeast Asia. It was decoded in… Leer más ›
Shortwave Radiogram, 1 al 4 de Abril 2021, programa 198
Did we survive the time changes and frequency changes of Spring 2021? The only new frequency this weekend is the Friday 1500-1530 UTC DRM transmission from WINB Pennsylvania, on new 15750 kHz, replacing 13655, for those of you who have… Leer más ›
Shortwave Radiogram, 25 al 28 de Marzo 2021, programa 197
This Sunday, 28 March, begins the change of clocks to summer time in most of Europe. Because our transmissions on Sunday remain at the same UTC time, most European listeners will hear them one hour later by local time. Shortwave… Leer más ›
Shortwave Radiogram, 18-21 March 2021, program 196
Hello friends The spring time change is now complete in North America (a few states and provinces do not observe daylight time). WINB on 9265 kHz and WRMI 9955 kHz keep programs at the same Eastern times, so Shortwave Radiogram… Leer más ›
Shortwave Radiogram, 12-14 March 2021: Tweaking our html transmission
This weekend begins the dreaded seasonal changing of the clocks. Most of North America will move clocks forward one hour at 2:00 am local time on Sunday. On the frequencies used by WRMI for Shortwave Radiogram on Sunday, the UTC… Leer más ›
Shortwave Radiogram, 5-7 de Marzo 2021
Reception was certainly variable last weekend, with successes and difficulties. Typical shortwave. See results at the Twitter account @SWRadiogram, or point your browser to https://twitter.com/swradiogram and scroll down. For listeners in Europe, there may be a few more chances to tune in… Leer más ›
Shortwave Radiogram, 26-28 February 2021
Last weekend’s experiment with Khmer text was usually successful. There were examples in which the MFSK64 English decoded perfectly, but the Khmer followed it showed some errors. This is not too surprising given that printing the Khmer seems a rather… Leer más ›
Shortwave Radiogram, 19-21 February 2021
It’s icy here in northern Virginia, but not bad compared to many places in North America. We still have electricity, so I was able to produce and upload program 192. My wire antennas are still up, except for the 40-meter… Leer más ›
Shortwave Radiogram, 12-14 February 2021: Celebrating World Radio Day
February 13 is UNESCO’s World Radio Day. Please don’t get carried away in your celebrations! I’m pleased to see World Radio Day focusing more on radio this year. In recent years it devolved to something more like “world mobile phone… Leer más ›
Shortwave Radiogram, 5-7 de Febrero 2021
I discovered last week that Shortwave Radiogram has a new transmission via WRMI on 9955 kHz. It’s Saturday at 0100-0130 UTC (Friday evening in the Americas) on 9955 kHz. The 9955 kHz frequency is directed to Latin America, but reception… Leer más ›
Shortwave Radiogram, 29-31 January 2021
The word “blustery” was created for days like we are having today in the Washington DC area. It’s below freezing with gusts that sahke the house. At least my wire antennas are still in the air. And I hope electricity… Leer más ›
Shortwave Radiogram, 22-24 January 2021
Here in Washington DC area, Inauguration Day (January 20) passed without incident. I monitored the local 2-meter repeaters for “situation” reports, but, fortunately, there were no situations to report. Last weekend’s reception provided more adventures in winter (or summer, depending… Leer más ›
Shortwave Radiogram, 15-17 January 2021
Mid-winter (in the Northern Hemisphere) has created several opportunities for good shortwave reception – and some frequencies that are impossible to hear, depending on your location. You can see listeners’ results at Twitter @SWRadiogram, or if you don’t have a… Leer más ›
Shortwave Radiogram, 8-10 January 2021
I hope 2021 is off to a good start good, safe and healthy start for you and yours. Mine is off to a good start because I remembered not to type “2020” – at least so far. Last week’s program… Leer más ›
Shortwave Radiogram, 1-3 January 2021: Must get used to typing 2021 rather than 2020
What better way to bring in the new year 2021 than decoding the modes on Shortwave Radiogram? Thank you for your friendship and support, and for tuning in and decoding, during 2020. May the new year bring less virus and… Leer más ›
Shortwave Radiogram, 25-27 December 2020: Our Holiday Spectacular
As I type this, here in northern Virginia we are experiencing heavy rain and high winds. And they say we might hear some thunder. Nothing like that sort of weather to get a person in the holiday spirit. It also… Leer más ›
Shortwave Radiogram, 18-20 December 2020: Digital modes to a habitable planet
Reception of Shortwave Radiogram was generally good last weekend. Thanks for all you reports. We in the US Atlantic seaboard had unusually good reception on 15770 kHz on 12 December after the usual difficult reception the day before. For listeners… Leer más ›
Shortwave Radiogram, 11-13 December 2020
Reception last weekend was difficult in some parts of the world, but there were plenty of good decodes nevertheless. A good place to see results reported by listeners is the @SWRadiogram Twitter account. If you are not on Twitter, point… Leer más ›
Shortwave Radiogram, 4-6 December 2020
Hello friends, Because of increased solar activity, and because of conditions generally during these months near the solstice, reception and decoding will be interesting in the next few weeks. For example, the 15770 kHz transmissions, directed to Europe, might be… Leer más ›
Shortwave Radiogram, 27-29 November 2020
Hello friends, Happy Thanksgiving to listeners in the USA. I’m thankful for the great global group of radio enthusiasts who tune in, decode, and keep in touch. Last week I mentioned that the Sunday 0800-0830 UTC broadcast (the red-eye) on… Leer más ›
Shortwave Radiogram, 20-22 November 2020, programa 179
Hello friends, Is anyone using, or attempting to use, Fldigi with the MacOS Big Sur? John in Texas, who reports every week via email, writes: «just upgraded to Apple’s new OS Big Sur 11.0.1 and FLDigi seems to communicate with… Leer más ›
Shortwave Radiogram, 13-15 November 2020: Digital modes that linger longer after landfall
During the past two weekends, we saw a few examples (including this one) of the new MFSK wide modes providing a improvement over the conventional MFSK32 and MFSK64. While the tests were mostly inconclusive, we did learn about the… Leer más ›
Shortwave Radiogram, 6-8 November 2020: Complex experiments – wear your white lab coat
With the winter time change now fully in effect, please note that broadcasts of Shortwave Radiogram from WRMI Florida stay with their UTC times, so they are one hour earlier by local time in most of North America and… Leer más ›
Shortwave Radiogram, 29 October-1 November 2020: The wide world of wide modes
In this note, we will discuss 1) the winter time changes and 2) this weekend’s experiment with the new MFSK wide modes. Winter time changes. By now, most of Europe has turned clocks back one hour for “winter” time. And… Leer más ›
Experiments with MFSK Wide modes
Shortwave Radiogram experimentara con las nuevas modalidades MFSK32WIDE y MFSK64WIDE en las próximas emisiones.
Shortwave Radiogram, 22-25 October 2020: Fun with Forward Error Correction
Apologies for the missing transmission Sunday, 18 October, 2330-2400 UTC on 7780 kHz. It’s an old WRMI transmitter, and such interruptions occur occasionally. The transmitter is back on the air now, and let’s hope it’s still operating this Sunday…. Leer más ›
Shortwave Radiogram, 15-18 October 2020: Via the (near) Arctic to China
Last week’s experiment with Olivia 32-1000 at 2000 Hz produced several
examples from listeners of the Olivia 32-1000 succeeding when the MFSK32
and MFSK64 text mostly failed and my voice introduction was generally
inaudible
Shortwave Radiogram, 8-11 October 2020: Does something sound different?
With difficult reception this time of year in some parts of the world,this weekend we will transmit a slow, robust mode: Olivia 32-1000 (32 tones, 1000 Hz wide). The extra “twist” in this exercise is that the Olivia 32-1000… Leer más ›
Shortwave Radiogram, 1-4 October 2020: Digital modes that will get to Mars before the next rover
Last week’s experiment with MFSK16 produced some successful decodes when the MFSK32 and MFSK64 text was less than 100%. I had a couple examples on 15770 kHz from WRMI Florida using SDRs in Russia and Ukraine. For some reason,… Leer más ›
Shortwave Radiogram, 24-27 September 2020: Do you see a pattern here?
Perhaps because of equinox propagation, reception of Shortwave Radiogram has been difficult lately in some parts of the world. Listeners in the eastern half of North America have been especially affected, with many of our frequencies (15770 for example)… Leer más ›
Shortwave Radiogram,17-20 September 2020: The Official Digital Modes of Sunspot Cycle 25
Last weekend’s excerpt of Hungarian text from the revived RFE/RL Hungarian Service was received and decoded successfully all over the world, including all the diacritics. Here is an example as transmitted from Florida and received in, appropriately, Hungary. Videos… Leer más ›
Shortwave Radiogram, 10-13 September 2020: Hungarian text, with diacritics, via shortwave
We have returned after a brief vacation to western Maryland. It rained most of the time we were there. But that’s OK, because it was cooler than here in the heat and humidity of the Washington DC area. It… Leer más ›
Shortwave Radiogram, 3-6 September 2020: Brought to you by the color blue
This weekend (5-6 September), The Mighty KBC moves to its winter frequency of 5960 kHz (replacing 9925 kHz), for its transmission from Nauen, Germany to North America, Sunday 0000-0200 UTC (Saturday 8-10 pm EDT). A minute of MFSK64 is… Leer más ›
Shortwave Radiogram, 27-30 August 2020: First digital modes to parachute from a solar-powered airplane
This weekend, the unusual twist in Shortwave Radiogram will be a brief news item in the Thor 100 mode. Thor 100 is fast (352 wpm) and wide (1800 Hz). I seem to recall we tried Thor 100 previously on… Leer más ›
Shortwave Radiogram, 20-23 August 2020: Digital modes that will dent your magnetic shield
Last weekend’s experiment with Belarusian text from RFE/RL was generally successful. It was also timely, given the interdiction of the internet in Belarus. This tweet showing distant reception of the Belarusian text using simple equipment generated much interest. For… Leer más ›
Shortwave Radiogram, 13-16 August 2020: Digital modes that don’t Minsk words
Apologies for the late start last weekend of the Friday 1300-1300 UTC broadcast on 15770 kHz. When it finally came on the air about halfway in to the half-hour, reception was great here in the mid-Atlantic USA. The Saturday… Leer más ›
Shortwave Radiogram, 6-9 August 2020: Supersonic exotic modes
During last weekend’s Shortwave Radiogram, there were several examples of the MFSK16 text successfully decoding under difficult conditions. You can decode from this reception in Russia on 15770 kHz from WRMI Florida. See also my tweet about decoding the… Leer más ›
Shortwave Radiogram, 30 July-2 August 2020: Digital modes for high-altitude mammals
Many Shortwave Radiogram listeners enjoy decoding SSTV transmissions from the International Space Station. The next SSTV from the ISS is scheduled for 4 and 5 August, on the usual 145.8 MHz FM. Details are here. The passes seem to… Leer más ›
Shortwave Radiogram, 23-26 July 2020: Digital modes that leave permafrost frozen permanently
Typical summer weather here, but even more so. Many consecutive days of temperatures above 90F, or 32C. And several days above 95F, or 25C.These hot days are often capped in the late afternoon or early evening with a rollicking thunderstorm…. Leer más ›
Shortwave Radiogram, 16-19 July 2020: Includes some 中文 that probably won’t be received in 中国
Radiogram transmite texto e imágenes digitales desde un transmisor de onda corta analógico. El programa es producido y presentado por el Dr. Kim Andrew Elliott.
Shortwave Radiogram, 2-5 July 2020: No cooling trend here
In our part of the world, summer weather is here. We usually keep the air conditioning off as long as possible, but, finally, it was necessary today. Upstairs, where I produce Shortwave Radiogram, the effort of the AC is, at… Leer más ›
Shortwave Radiogram, 25-28 June 2020: Sending technosignatures to the far reaches of space.
I’m not a fan of too much sunlight, such as what we are experiencing now in the Northern Hemisphere. Still, it might create some interesting propagation between our Northern Hemisphere transmitters and receivers in the Southern Hemisphere, where sunlight is… Leer más ›
Shortwave Radiogram, 18-21 June 2020: Digital modes closely approaching the Sun
As a retired bureaucrat, I prefer to play radio. But occasionally I get involved in the debate about US international broadcasting, as in my recent opinion piece in The Hill. It’s a sequel to another piece in The Hill back… Leer más ›
Shortwave Radiogram, 11-14 June 2020: Digital modes that extract CO2 from the atmosphere
Well, today I had a haircut. Removed what seemed to be ten pounds of hair from my head. It feels much better! Things are slowly returning to normal. I hope you are doing well. Last week reception was good or… Leer más ›
Shortwave Radiogram, 4-7 June 2020: Digital modes fraught with sarcasm
Last weekend, there were a few examples of the Olivia modes, especially 64-2000, surviving conditions where MFSK32 showed errors. You can listen to and decode from one example posted here – WINB as received in South Australia. Videos of last… Leer más ›
Shortwave Radiogram, 28-31 May 2020: Olivia modes — slowest, slower, slow
I am not sure if I saw any advantage in last weekend’s Thor22 over our usual MFSK32, and not much over the much faster MFSK64. On my PC, the Thor22 performed poorly via WINB, but well via WRMI. There is… Leer más ›
Shortwave Radiogram, 21-24 May 2020: Goes well with asparagus
Last week we enjoyed good reception – or at least good enough for MFSK32 – most of the time and in most places where our signal could reasonably be heard. Thanks for noting, in your reception reports, the approximate percentage… Leer más ›
Shortwave Radiogram, 14-17 May 2020: Digital modes that are ultra-thin and flexible
Occasionally a Shortwave Radiogram is especially difficult to produce due to errors and technical difficulties. This weekend’s show (program 152) is one of them. To make everything fit into 29 minutes, 30 seconds, I had to eliminate the final paragraphs… Leer más ›
Shortwave Radiogram, 7-10 May 2020: Digital modes that do not melt the Greenland ice sheets
For some of the Shortwave Radiogram transmissions last weekend,propagation was difficult. On other transmissions, reception was great. We can declare success if 90% of the MFSK32 text decodes correctly. That will often happen even under very difficult reception conditions. Videos… Leer más ›
Shortwave Radiogram, 30 April-3 May 2020: Digital modes, sometimes via the long path
Please note that The Mighty KBC returns to its summer frequency of 9925 kHz this weekend, Sunday 0000-0200 UTC, or Saturday 8-10 pm EDT. The 9925 kHz frequency is from a transmitter in Nauen, Germany. Dave and Eric present rare… Leer más ›
Shortwave Radiogram, 23-26 April 2020: Digital modes that degrade plastic and mix up the gases on Venus
I hope this finds you well and avoiding the COVID-19 and any other viruses that might be lurking. With most of us spending most of our time at home, radio and the various radio-associated hobbies and pastimes are a good… Leer más ›
Shortwave Radiogram, 16-19 April 2020: Digital modes to the asteroids (and beyond)
Our only mishap last weekend was a late transmitter start at WRMI, resulting in the Friday 1300 UTC transmission on 15770 kHz not starting until about 1310 (in progress). Especially at WRMI, when a transmitter does not start on time,… Leer más ›
Shortwave Radiogram, 9-12 April 2020: Transmitting digital modes, not viruses
Last weekend, it was, as usual, difficult to find a Shortwave Radiogram signal bad enough to provide a good test for our slow modes: Olivia 64-2000 and MFSK16. There were, however, a few instances of Olivia 64-2000 succeeding where the… Leer más ›
Shortwave Radiogram, 2-5 April 2020: More strange radio experiments to pass the stay-at-home hours
Last weekend’s experiment with Olivia 16-1000 produced results that were definitely indefinitive. In the few cases where I could find a signal bad enough to give the mode a real test, the Olivia 16-1000 did not seem any better than… Leer más ›
Shortwave Radiogram, 26-29 March 2020
In this time of transition from winter to summer (or vice versa in the Southern Hemisphere), reception of Shortwave Radiograms good at some times on some frequencies, and marginal at other times and on other frequencies. Because many of us… Leer más ›
Shortwave Radiogram, 19-22 March 2020: A good socially distant activity
During this extraordinary time when COVID-19 is still in its ascendancy most places, I hope you are staying healthy. Shortwave Radiogram is a good activity during enforced isolation. And we can stay distantly social by way of email and the… Leer más ›
Shortwave Radiogram, 12-15 March 2020: MFSK-64 in the time of COVID-19
Here in North America, now that the transition to Daylight Savings (summer) Time is complete, there are some additional changes to the Shortwave Radiogram schedule. The schedule for WINB on 9265 kHz stays with Eastern local time, so Shortwave Radiogram… Leer más ›
Shortwave Radiogram, UTC 6-8 March 2020: Digital modes that dock in orbit
Thanks to Al @WD4AH for moderating the @SWRadiogram Twitter account while I was attending the Winter SWL Fest in Plymouth Meeting, Pennsylvania. The @SWRadiogram Twitter is the best way to see the decoding results of Shortwave Radiogram listeners around the… Leer más ›
Shortwave Radiogram, 27-29 February 2020: Low-methane digital modes
If you will be attending the Winter SWL Fest this weekend near Philadelphia, I look forward to seeing you there. Also a reminder about this very useful reference for new and experienced Shortwave Radiogram decoders: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway Videos of last weekend’s… Leer más ›
Shortwave Radiogram, UTC 21-23 February 2020: A trilingual weekend
The Winter SWL Fest starts one week from today (Thursday). It will take place 27-28-29 February 2020 in Plymouth Meeting, Pennsylvania (suburban Philadelphia). I will speak after the Saturday evening banquet about “International Broadcasting in Interesting Times.” If you can… Leer más ›
Shortwave Radiogram, 14-16 February 2020
Today (February 13) is UNESCO’s World Radio Day. The day is not so much for radio enthusiasts, but to promote the social goals of UNESCO by way of radio. Nevertheless, it’s good to have a day that acknowledges radio. So… Leer más ›
Shortwave Radiogram, UTC 7-9 February 2020
The Winter SWL Fest will be February 27-28-29 in Plymouth Meeting, Pennsylvania (suburban Philadelphia). Information at http://swlfest.com. I will be there to demonstrate Shortwave Radiogram, and they have invited me to be the banquet speaker (“International Broadcasting in Interesting Times”)…. Leer más ›
Shortwave Radiogram, UTC 31 January-2 February 2020
During the past week, WRMI was reported in 11580 kHz, replacing 15770 kHz. I was ready to change the Shortwave Radiogram transmission schedule (below), when listeners informed me that WRMI was back on 15770. In response to my email, WRMI… Leer más ›