Category Archives: Shortwave Radio

High-Frequency Trading Service: FCC posts two lobbying documents by DPA Mac

Many thanks to SWLing Post contributor, Benn Kobb (AK4AV), who notes that the FCC has posted for public inspection two lobbying documents by DPA Mac, applicant for a new DRM HF broadcast station with 2 kW of transmitter output power.

Benn notes:

“Regardless of DPA’s claims that its broadcasts will be free of charge and not encrypted, its non-broadcast high-frequency trading service will be for paying customers only.

“That is the purpose of this station and is why its target areas, as seen in a world map slide, are limited to the location of certain foreign exchanges. This despite its claim to be a worldwide service.

“There is little profit in SW broadcasting today, and what business there is available is accommodated by those existing US HF stations that can hang on through economic shifts. No, the DPA Mac station is not devoted to global information as a business venture. It wants a license to provide private telecommunications. The broadcasts to the public are just so it can get licensed, because there is no other radio service in the HF spectrum for private international data links.

“At this time no one knows what the FCC will do with this license application and two other similar applications. What is clear is that the applicants want to get on the air ASAP before any possible changes that may affect the HF broadcasting service.”

The FCC posted the following documents in an accessible place on their website yesterday morning:

https://www.fcc.gov/ecfs/document/1110171119378/1

https://www.fcc.gov/ecfs/document/1110171119378/2

Thank you for the update, Benn.

Has WTWW left shortwave?

I recently learned from a few reports on Twitter that WTWW left shortwave for good on November 9, 2022 and will now only broadcast over the internet. I missed this announcement on the air and WTWW’s website doesn’t seem to reflect this information yet.

The WTWW wikipedia page has already been updated, however, with WTWW’s services noted in the past tense and the following addition was made this week:

On November 9, 2022, WTWW announced it would discontinue all shortwave operations, with intent to continue streaming the programming as long as it was feasible. Ted Randall cited a massive increase in transmitter usage fees (the majority of that being from electricity cost) that the station could not realistically pay. The station signed off for the last time that night, with its final programming including a farewell message from Randall encouraging listeners to continue listening to the Web stream, a string of listener requests from WTWW’s automated system, and the final song being a rendition of “America the Beautiful” by one of Randall’s favorite recording artists, Ronnie Milsap.

Can anyone confirm if WTWW has indeed stopped all shortwave transmitting? Please comment.

 

Shortwave goes all chirpy chirpy, cheep cheep again

Hi SWLing post community and birdwatchers everywhere Fastradioburst23 here. Just to let you know if WRMI is on the air this Sunday (fingers crossed) after an encounter with yet another hurricame expect an additional programme of  WREN.

This week’s Imaginary Stations show on Sunday 13th November 2022 features our feathered friends again with lots of bird related classics and bird watching tips. Tune into 9395 kHz from 2300 utc onwards.

A review of the Tecsun H-501x portable shortwave radio receiver

I was recently searching for my review of the Tecsun H-501x on the SWLing Post to send to a reader when I realized I had not yet published it here! Let’s fix that…

The following review of the Tecsun H-501x was originally published in the November 2021 issue of The Spectrum Monitor magazine. Enjoy:


A review of the Tecsun H-501x

by Thomas (K4SWL)

Last year [2020], we were treated to a group of new shortwave portables from Tecsun:  the PL-990, PL-330, and the H-501.

Although all of these models garnered attention from shortwave listeners, one model in particular seemed to draw the most interest, the Tecsun H-501.

No doubt, much had to do with the H-501’s size––a large format portable––and especially the twin stereo speakers, that no doubt sparked the interest of those of us who owned (or wished we owned) the venerable Grundig Satellit 500 or 700 with its reputation for robust audio.

Tecsun was also very clear during their product announcement in 2019 that the H-501x is the flagship portable for the Tecsun line.

H-501 versus H-501x

Note that the product being evaluated in this review is the H-501x; the latest “export” version of the H-501.

The differences between these two models is fairly modest. The “x” model gives the user a slightly lower frequency floor in longwave and shortwave, and finer FM tuning (50 kHz as opposed to 100 kHz) when the AM tuning steps are set to 9 kHz as opposed to 10 kHz.

The differences are so modest between the H-501 and H-501x, I wouldn’t be worried if you already have the H-501. I would simply encourage you to only purchase from a reputable Tecsun distributor so you can be confident you’re not receiving one of the very early production runs of the H-501 that was only distributed domestically within China. Some of these early domestic models didn’t have all the refinements of the latest H-501 versions. I would encourage you to only purchase the H-501 or H-501x from a reputable distributors like Anon-Co, Waters and Stanton, Tecsun Radios Australia, and Bonito.

Unique features

Besides the large dual speakers of the H-501x, there are a number of other unique features and design choices that truly set the H-501 series apart from other Tecsun models.

 

Firstly, the H-501x uses two 18650 Lithium Ion batteries housed in two separate battery compartments. Both batteries can be internally charged, but here’s the interesting part: each battery seems to be somewhat independent of the other. When you engage battery charging, you must select, via a mechanical switch on the back of the radio, “Battery A” or “Battery B.” Only one battery can be charged at a time, and thus only one will power the radio at a time.

More than once, I’ve been listening to the H-501x and the battery indicator started flashing, signifying a low battery. I simply switched the battery switch to Battery B, and, voliá:  I have a full battery again! This reminds me of a college friend’s VW Beetle that had a spare fuel tank…with this unique feature, when you were running low on fuel, you’d kick in the spare fuel tank and then make plans to refuel the main tank soon. Of course, with the H-501x, both these “fuel tanks” are also generous ones, in that the batteries last for a good while.

I find that the play time of each battery impressive given the size and audio amplification used in the H-501x. I had worries that the unit’s need for two batteries could suggest a short battery life, but fortunately this hasn’t been the case, no matter what mode I’ve used (FM, AM, shortwave, or Bluetooth).

However I will note here that the supplied switching power supply will inject noise if you try listening to AM or shortwave while charging. This hasn’t affected FM reception, though.

The fold-out metal bail on the H-501x is very large. This shouldn’t have surprised me, but it did. The H-501x is tall and wide, but not very deep––only marginally deeper than, say, the PL-880. The bail needed to be low-profile, but also support this mini “wall” of the radio while in use. The metal wire bail is handy and certainly does the trick, although there’s only one tilt position, and when it’s deployed, the radio effectively has a large footprint. This might limit where you can set it if the surface––say, a bedside table––is small. Not a problem for me, but worth noting. Continue reading

Carlos’ Shortwave Art and recording of the Voice of Korea (November 4, 2022)

Many thanks to SWLing Post contributor and noted political cartoonist, Carlos Latuff, who shares his radio log art of a recent Voice of Korea broadcast.


Carlos notes:

Part of news bulletin from Voice of Korea Radio, 12015 kHz, broadcasting in English from Kujang, North Korea, and listened in Porto Alegre, Brazil, November 4, 2022, 21h (UTC).

“Press Statement of Pak Jong Chon, Secretary of the Central Committee of the Workers’ Party of Korea

It is reported that the United States and south Korea have decided to prolong the “Vigilant Storm” joint air drill.

It is a very dangerous and wrong option.

The irresponsible decision of the United States and south Korea drives the present situation created by the provocative military action of the allied forces to an uncontrollable situation.

The United States and south Korea will come to know that they made irretrievable terrible mistake.

Pyongyang
November 3, Juche 111(2022)”

Click here to view on YouTube.

More Wrenaissance on shortwave

Hi all SWLing post community, Fastradioburst23 here letting you know of our next episode of renaissance music radio across the shortwaves this weekend thanks to WRMI.

This Sunday 6th November 2022 from 2300 utc on 9395 kHz there will be another transmission of WREN and in keeping with last week’s show they’ll be much more modal music and to quote Wikipedia, more “Harmony that places a greater concern on the smooth flow of the music and its progression of chords.” Tune in and enjoy another journey way back into time.

Most of the Imaginary Stations shows that have been broadcast are now archived here.

STOP PRESS • Last night’s show now archived online here.

Reception Reports Requested: “One-Off” DRM Broadcast From Woofferton To India Today

Many thanks to SWLing Post contributor, Mangosman, who shares the following announcement from the DRM Consortium:

Encompass Plans A One-off Broadcast From Uk To India On Nov 4th

Encompass Digital Media will be running a one-off transmission from its site in Woofferton, UK, on Friday 4th of November. This electronic music broadcast will target the whole of India, around 5,000 miles (or about 8,000 kilometres) as the crow flies to the centre of the country. This might be the longest distance Encompass has covered with its DRM transmissions.

Before the actual broadcast, several tests were run using different frequencies, antennas and power combinations. The final test on November 2nd to confirm final set-up was a great success as the audio could be recorded from a KiwiSDR online receiver located in New Delhi. The SNR of 20dB was measured in New Delhi and 23.9dB in Bangalore, which proves the power of shortwave radio and how DRM and its excellent sound, even in shortwave, can travel such long distances. The audio was also decoded in Bangkok, and a listener report came even from Canada!

This experimental broadcast promoting the music of C. M. Obrecht is scheduled for tomorrow [today Nov 4 at time of publishing], 19:00 – 20:00 UTC, on 11710kHz. It will use xHE-AAC codec with DRM Mode B, transmitting at 125kW on a 78* bearing from Woofferton. The audio will be accompanied by ancillary data including a slideshow image of the album cover art.

Although the transmission time will mean it will be quite late in India, Encompass is interested in receiving any reception reports from within the country, particularly from anybody using a car radio. Please send reception reports to Steve Palmer at: [email protected] (This is also the address to use for further information about Encompass’ DRM projects and services).