Tag Archives: Propagation

Excellent current conditions, evidenced by today’s 31 meter logs


This morning, before heading out the door, I tuned around the 31 meter broadcast band. I’ve actually been recording 640 kHz of the 31 meter band for almost 24 hours, trying to capitalize on the fact that propagation conditions have been the best I’ve seen in several months. At some point in the future, I’ll load this recording, tune through it and remind myself what’s possible when propagation is favorable! Check out the waterfall screenshot above.

Asian stations had a strong showing on the band in eastern North America this morning.

Here are the stations I logged starting around 12:30 UTC today:

  • 9395 WRMI English
  • 9410 China National Radio 5 Chinese
  • 9420 China National Radio 13 Uyghur
  • 9430 FEBC Radio Chinese
  • 9440 China Radio International Cambodian
  • 9460 China Radio International English
  • 9470 UNID (weak)
  • 9490 Voice of America Korean
  • 9500 China National Radio 1 Chinese
  • 9515 China National Radio 2 Chinese
  • 9540 China Radio International Chinese
  • 9550 Radio Havana Cuba Spanish
  • 9570 China Radio International Cantonese
  • 9575 All India Radio Tibetan
  • 9580 Radio Australia English
  • 9600 China Radio International English
  • 9620 All India Radio Sindhi
  • 9635 Voice of Vietnam 1 Vietnamese
  • 9640 Radio Havana Cuba Spanish
  • 9645 China Radio International English
  • 9650 Radio Sonder Grense Afrikaans (with QRM)
  • 9660 Radio Taiwan International Chinese
  • 9665 KCBS Pyongyang Korean (weak)
  • 9680 Radio Taiwan International Chinese
  • 9700 Radio New Zealand International English
  • 9710 China National Radio 1 Chinese
  • 9720 Reach Beyond Australia (HCJB) Indonesian
  • 9730 China Radio International English
  • 9735 Radio Taiwan International Indonesian
  • 9740 BBC English
  • 9750 NHK World Radio Japan (?) Japanese
  • 9760 China Radio International English
  • 9785 China Radio International Laotian (?)
  • 9805 Radio Marti Spanish (w/accompanying Cuban jammer)
  • 9820 Radio Habana Cuba Spanish
  • 9830 China National Radio 1 Chinese (with RTTY QRM)
  • 9835 RTM Sarawak FM Malaysian (very weak)
  • 9840 Voice of Vietnam English
  • 9845 China National Radio 1 Chinese (weak)
  • 9855 China Radio International Chinese
  • 9870 AIR New Delhi Hindi
  • 9880 KSDA-AWR Guam Korean
  • 9920 FEBC Radio Hre
  • 9955 WRMI English
  • 9980 WWCR English
  • 10000  WWV Ft. Collins

That’s 46 signals in a space of 640 kHz–not bad!

I dare say: these excellent band conditions will not last forever.

Make time to play radio today!

The bands are open! Make time to listen.


Though I’ve spent the entire day sawing and splitting firewood, I’ve been actively recording spectrum on the 31, 25, 19 and 16 meter bands with the WinRadio Excalibur, Elad FDM-S2 and the SDRplay RSP. Why? Propagation–especially on the higher bands–has been the best it’s been in several weeks.

As I discovered at the recent SWLing Post DXpedition, my shack PC can handle making multiple spectrum recordings simultaneously as long as I limit each recording to the width of a broadcast band. (I’ve never tried pushing the limit very hard.) Someday in the future–perhaps when we’re having terrible propagation–I’ll play those spectrum recordings back and tune through them as if they were live.

Radio time travel at its best.


When I decided to throw in the towel with all of the firewood processing, I fired up the Sony ICF-SW100 (above) and tuned in a game on 17,855 kHz: Radio Exterior de España.

The REE signal was simply booming into eastern North America!

Hard to break away from the radio on days like this.

My advice? Take advantage of these conditions and make time to listen!

For me, SWLing a great excuse to relax and let me back heal after a long day of splitting wood. For some, perhaps it’s a good excuse to take the radio outdoors and away from urban interference. Whatever the excuse, don’t hesitate to fire up your radio!

There are some interesting stations on the bands this evening. Feel free to comment with some you’ve logged.

Met Office guide to space weather forecasts


Many thanks to SWLing Post contributor, Mike (K8RAT), who writes:

The Met Office has this brief introduction to the subject of space weather and the methods they use to make predictions. It may be useful to beginners in the radio hobby.

This download is found on The Met Office’s forecast page:

They are not giving us any good news regarding the next couple of days on HF.

Click here to download the Met Office guide: “Space Weather: Find out more about how we forecast space weather” (PDF).

Bill solves the CRI echo mystery


A few days ago, I posted an article about Bill Meara (producer of the SolderSmoke Podcast) who was hearing audio echoes on his home brew regenerative receiver.

Bill has now solved this mystery (hint: it’s all about the receiver):

Hearing echoes on China Radio International


Bill Meara, producer of the popular SolderSmoke Podcast, recently recorded audio echoes on a couple of his home brew regenerative receivers.  Bill posted the following video, of his regen receiver tuned to China Radio International:

After Bill measured the echo delay at .133 seconds, he believes one possibility is that they originate from a propagation opening much like Lyle recorded on a 10 meter band opening last year (click here to listen to the audio and read the post).

A few days later, Bill recorded a similar echo effect while tuned to Brother Stair (Overcomer Ministries) on a different regenerative receiver. Click here to read the post and view the video.

The fact that Bill measured a .133 second delay (the amount of time it would take for a signal to circle the globe), makes me believe he’s hearing an echo similar to Lyle. But I must admit, I’m a bit amazed that a faint AM echo could penetrate blowtorch signals like CRI and Brother Stair’s relay generate State side.

Readers: What’s going on here? Is Bill catching rare propagation openings–or perhaps ducting in the Earth’s magnetosphere and ionosphere–or is there another explanation?