David Goren’s Shortwave Shindig will once again broadcast live–in a few moments–from the Winter SWL Fest in Plymouth Meeting, Pennsylvania.
Tune in at 22:00-23:00 EST tonight (that’s 03:00-04:00 UTC, February 28) on 7,570 kHz.
For your listening pleasure: Radio Poland.
This recording was made on February 2, 2015 on 9395 kHz starting at 1800 UTC. Although Radio Poland formally left the shortwaves in 2013, their service is now relayed by Global 24 Radio.
Click here to download the recording as an MP3, or simply listen via the embedded player below.
[Update: Please note that this survey has been closed, but the audio samples–labeled Radio A and Radio B–will remain to allow others the opportunity to make an evaluation prior to reading the PL-680 review.]
[Update 2: The PL-680 review and readers’ survey results have now been posted! Check it out here.]
The results from the PL-680/PL-660 reader surveys (here and here) have been pouring in! As of this posting, well over 200 readers have participated by listening to and evaluating the two receiver comparison surveys. Thank you!
Yesterday evening, I spent time comparing the Tecsun PL-660 and PL-680 with medium wave reception in mind. I recorded dozens of samples and picked four broadcast recordings I felt best represented receiver performance. Note that this will be my final survey before I post the PL-680 review later this week.
If you’re not familiar with these readers surveys, please read our first post, as it contains all of the vital info and disclaimers.
To participate in this survey, start by simply listening, then fill out the form that follows with your choice of “Best Radio” for each broadcast. All of these medium wave samples were recorded in the evening hours, which I believe is more indicative of receiver sensitivity, selectivity and AGC. Notice that I indicate distance to target station (as the crow flies).
750 AM – WSB Atlanta, Georgia, USA (171 mi/275 km)
740 AM – CFZM Toronto, Canada (580 mi/933 km)
940 AM – WMAC Macon, Georgia, USA (204 mi/328 km)
700 AM – WLW Cincinnati, OH, USA (271 mi/436 km)Click here to use our response form to vote on your favorites, or simply use the form embedded below:
I’ll leave all PL-660/PL-680 comparison surveys open for evaluation until I publish the Tecsun PL-680 review.
My buddy, @K7al_L3afta (on Twitter), posted this interesting recording of the US Air Force High Frequency Global Communications System on 15,016 kHz USB at 18:01 UTC yesterday:
I don’t believe I’ve ever heard or noticed this type of USAF HF-GCS transmission before. Sounds almost like a numbers station.
Update: SWLing Post reader, Daniele, comments:
It’s an EAM, “Emergency Action Message”:
http://en.wikipedia.org/wiki/Emergency_Action_Message
http://mt-milcom.blogspot.it/p/what-is-emergency-action-message-or-eam.html
Thanks, Daniele!
As I’ve mentioned before, @K7al_L3afta lives in an urban area of Morocco and his shortwave radio listening is plagued with radio interference (RFI). Still, he seems to snag some interesting catches on the shortwaves just like this one which he said he caught by “turning the tuning knob randomly.”
Serendipity is, indeed, the best type of SWLing!
You can follow @K7al_L3afta on Twitter by clicking here.
[Update: Please note that this survey has been closed, but the audio samples–labeled Radio A and Radio B–will remain to allow others the opportunity to make an evaluation prior to reading the PL-680 review.]
[Update 2: The PL-680 review and readers’ survey results have now been posted! Check it out here.]
The results from the PL-680/PL-660 reader survey have been pouring in! As of this posting, over 160 readers have participated by listening to and evaluating the AM shortwave audio samples. Thank you!
This morning, I spent time comparing the Tecsun PL-660 and PL-680 with synchronous detection in mind. Time permitting, I hope to publish at least a medium wave audio survey, too, before I post the PL-680 review later this week. I doubt I will post an SSB reception survey since my digital recorder injects a bit of noise into those recordings.
If you’re not familiar with these readers surveys, please read our previous post, as it contains all of the vital info and disclaimers.
To participate in this survey, start by simply listening, then fill out the form that follows with your choice of “Best Radio” for each broadcast. Please note that I include two recordings per broadcast, but ask that you choose the best radio overall for each broadcast.
For example: if you feel that Radio A is better in the first recording of Radio Australia, but Radio B is slightly better in the second recording (again, of Radio Australia), you still need to chose which radio is best overall in the Radio Australia recordings set.
You’ll note that signal stability varies between the two recordings; this is simply the nature of shortwave radio. Also note that each recording was made within one minute of the other in each set.
Below I’ve provided two recordings of Radio Australia on 9,580 kHz. In both recordings, I have the PL-660 and PL-680 in normal AM mode for the first half of the recording–you will hear a het (hetrodyne–which sounds like a high-pitch tone) in the upper sideband. About halfway through the recording, I switch each radio into lower sideband sync, which effectively removes the het sound.
I have provided two recordings for each radio since QSB (fading) was fast and deep. Indeed, you’ll note in the second set of recordings that the radios had more difficulty maintaining the sync lock.
Radio Riyadh could certainly be considered weak-signal listening this morning, though their opening on 16 meters was quite good for the time of day.
In the recordings below, I start in AM mode, then switch the radio to USB sync after 15 seconds, and to LSB sync after 30 seconds.
In the first set of recordings both radio’s filters are set wide; in the second set, narrow.
First Recording: Radio A – (wide band filter)
First Recording: Radio B – (wide band filter)
Second Recording: Radio A – (narrow band filter)
Second Recording: Radio B – (narrow band filter)
Click here to use our response form to vote on your favorites, or simply use the form embedded below:
I’ll leave all PL-660/PL-680 comparison surveys open for evaluation until I publish the Tecsun PL-680 review.
For your listening pleasure: beHAVior Night, a shortwave radio show (relayed by WBCQ) dedicated to showcasing music from the first four decades of the 20th Century.
This show was recorded on 7,490 kHz, starting at 22:00 UTC on February 13, 2015.
Click here to download the recording, or simply listen via the embedded player below:
[Update: Please note that this survey has been closed, but the audio samples–labeled Radio A and Radio B–will remain to allow others the opportunity to make an evaluation prior to reading the PL-680 review.]
[Update 2: The PL-680 review and readers’ survey results have now been posted! Check it out here.]
I’ve been spending a little time with my new Tecsun PL-680 today, and it’s been most interesting. Of course, I’ve already begun to form a few opinions about the radio and am taking notes. Yet I never believe a shortwave radio can be judged in one sitting; there are simply too many variables to account for, such as minute changes in propagation, fading, local radio interference, all of which can have a temporary effect on performance. It’s better to judge a radio after having used it over the course of at least a week or so, in diverse reception conditions.
Still, as I tuned the PL-680, I was already wondering how it compared with its predecessor, the PL-660–? And since I’ve received at least ten emails from readers curious about the same thing, I thought I might start a series of blind audio tests in order to let our readers decide for themselves.
So…ready for some fun?
Below, I’ve embedded eight recordings comparing the PL-660 and PL-680 on shortwave. All of these are recordings of broadcast stations, no SSB yet (I simply didn’t have the time today).
To participate, just listen, then fill out the form that follows with your choice of “Best Radio” for each broadcast. But do note the following:
Click here to use our response form to vote on your favorites, or simply use the form embedded below: