Category Archives: FM

A TIVDIO T6-A Six Watt FM Transmitter (via Walmart!)

My, how times have changed!

I remember when I was a kid, if you wanted an FM transmitter with more power than the allowed FCC Part 15 regulations (250uV/m or 48dBu at 3 meters), you had to build it or hack it yourself.

Those days are long gone. SWLing Post contributor, Bill, shares a link to this six watt FM transmitter available via Walmart of all places!

Of course, Walmart isn’t exactly selling this transmitters in stores–they’re simply handing the inventory and shipping for a third party retailer (AMI Ventures Inc. in this case).

And I’m picking on Walmart because the TIVDIO T6-A, along with other similar FM transmitters, have been available from retailers like Amazon and eBay for ages.

Still, I find it a little funny that you can essentially start your own community/neighborhood FM station by making a purchase at Walmart!

DRM test successful in crowded Johannesburg FM market

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(Source: Radio Mag Online via Larry W)

The trial has demonstrated that there is no interference with analog stations on either side of the digital signal in the crowded FM spectrum of Johannesburg

JOHANNESBURG, South Africa — Johannes von Weyssenhoff, representing the community station Wecodec in Johannesburg, presented the case of DRM to an international audience at the “Radio Days Africa,” an annual event taking place at the Witwatersrand University in Johannesburg. His presentation also included results and findings of WECODEC’s ongoing DRM+ trial, the first of its kind on the African continent, according to DRM news.

The trial has demonstrated that there is no interference with analog stations on either side of the digital signal in the crowded FM spectrum of Johannesburg. The DRM power for the test is ¼ that of FM, giving similar coverage at 4QAM.[…]

Click here to read the full article.

RadioWorld free eBook: Global Digital Radio

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(Source: Radio World via Dennis Dura)

Digital radio continues to progress at a rapid pace worldwide. The latest Radio World International eBook, “Global Digital Radio,” takes a look at how each region is preparing for the transition, planned FM switchoff dates and requirements, ways in which digital radio can pave the way to the connected car, how digital radio’s emergency warning functionality can provide relief in times of disaster, and more.

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Richard’s initial impressions of the Sony XDR-S41D FM/DAB receiver

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Many thanks to SWLing Post contributor, Richard Langley, who recently attended a conference in Paris and picked up a Sony XDR-S41D. Richard writes:

The workshop closed around noon on Friday so I spent part of the afternoon walking around the nearby Darty consumer electronics and appliance store.

I wanted to buy a DAB/DAB+ portable receiver just to see what Europe was doing with digital radio. I bought a recently introduced Sony XDR-S41D DAB/DAB+/FM(with RDS) receiver for 79€ (about 11€ off list price).

I can use it in North America to listen to FM and take it with me when I visit Europe for DAB/DAB+ as well as FM.

It has reasonable sound from its 8-cm speaker and pretty good stereo sound on headphones. It has an automatic search mode on both DAB/DAB+ and FM and creates a list of available stations.

In my hotel room in the 13th arrondisement, I could receive 46 DAB+ stations. One of the stations is World Radio Paris (WRP) and they provide English language programming 24 hours per day from BBC World Service, Public Radio International, Radio France International, and Radio Canada International, among others as well as their own programming.

Another available station was Medi 1, which just dropped its shortwave transmissions. I recorded some of the WRP programming:

Audio Clip 1 (MP3)

Audio Clip 2 (MP3)

There is no line output from the receiver but I was able to use the earphone output and crank the volume to maximum to get an acceptable recording level without noticeable distortion.

Happy with my purchase and can’t wait to go back to Europe again, say to England, to try out DAB+ there.

I also spotted three receivers with SW capability on the shelves at the Darty store:

Panasonic RF-3500 for 45€

Brandt BR200D for 45€

Brandt BR120A for 15€

You don’t see SW receivers in North American consumer electronics stores anymore and I’ve not spotted any in airport duty free stores lately either.

I’ve been listening to the XDR-S41D at home and it sounds pretty good on FM, too, and does a good job of displaying the RDS information although a character or two is sometimes cut off the end of the data but that could be the fault of the station. Need to investigate that some more.

By the way, the radio doesn’t come with a case but I found (just before I was going to toss it) that it just fits in the magnetic-clasp case of one of those Air Canada amenities kits that they give you in business class (see photo below).

That’s the second Air Canada item I have recycled. They used to use full-ear headphones with disposable foam covers. They were a perfect fit for the deteriorating covers on my old Sony noise-cancelling headphones. I’ve since upgraded to Bose. 😉

Thank you for sharing your thoughts, Richard! The Sony XDR-S41D sounds like a keeper for sure and is certainly compact enough to easily accompany you on travels to Europe. I was not aware of World Radio Paris either–I see they’re available via TuneIn, so I’ll add them to my WiFi radio station favorites!

RadioWorld free eBook: Propagation Analysis for Profit

Tecsun PL-660 Hidden Feature: FM Calibration

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Many thanks to SWLing Post contributor, Rick B, who writes:

I just thought I’d share with you a hidden function I discovered documented on the web for the Tecsun PL-660. It’s how to calibrate the FM band if you have a radio that is off frequency.

As my current PL-660 is accurate on FM, I haven’t had to try this myself. But perhaps it could save someone else from having to return/exchange a radio.

http://kaito.us/miscellaneous/qa/how-to-calibrate-the-pl660-on-the-fm-band.html

“Re-calibrating FM, radio needs to be on and set to FM band. Tune to the desired frequency/station you wish to listen to, press “SYNC” for about 3 seconds back light will flash. Tune up until the frequency/station sounds more clear press “1” to confirm re-calibration. If done correctly the correct frequency/station will be displayed on the display. Keep the battery in for all the time…”

Very cool! Thank you for sharing the tip, Rick!

Mystery solved: Remember the 8 Track FM radio converter?

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Sunday morning, I attended the Sainte-Foy flea market in Québec City. When I’m in QC, I love attending this particular market because of the amazing variety of things for sale. It’s a proper community event.

As I was browsing the various tables, I happened upon one of these:

Talk about a blast from the past!

Yesterday, I posted a cropped photo of this radio and it was quickly identified as an 8 Track FM radio converter by Ken (N2VIP). Steve Yothment found the same unit under a different brand and Bill Lee even found a Futura branded unit on the Internet. Of course, many others figured out this was an 8 Track to FM radio converter. Impressive sleuthing!

These radio tuners were popular in the days of the mobile 8 Track players–in that time period right before FM was standard in car radios, but 8 Track was somewhat prevalent.

My father had a similar FM radio converter for his 1966 Chevy pickup. As a kid, I thought the thing was fascinating! You simply inserted the unit into the 8 Track player and voilá!, FM radio!

I never quite understood how the FM reception was so decent considering there was no external antenna of any sort.

The rear of the converter looks like an 8 Track cartridge minus the magnetic tape.

Taking a closer look at this particular FUTURA brand converter, I’m impressed with the number of features on such a compact front end:

Analog FM dial
Red LED stereo tuning indicator
AFC OFF/ON switch
DX/Local switch
A wide, vertically-oriented tuning knob

I’m curious: how many Post readers had an 8 track FM radio converter in their vehicle? Or, did you ever have an Audio Cassette to 8 Track converter? Please comment! Also, you should check out some of the comments from our previous post.

And thanks for being sports about my “Mystery radio challenge“–I knew savvy Post readers would ID this tuner in no time!