Category Archives: AM

Taking a look at the XHDATA D109-WB . . . a sweet spot on the price/performance curve

By Jock Elliott, KB2GOM

The XHDATA D109-WB is a small radio that hits a sweet spot on the price/performance curve, delivering a lot of performance for not a lot of money (probably less than $60 US, depending on the source).

The D109-WB measures 5.9″L x 1.45″W x 3.07″H and weighs just over 10 ounces. It covers FM 64-108MHz, AM (medium wave) 520-1710KHz, LW 153-513KHz(9K), SW 1711-29999KHz, and seven NOAA Weather Radio channels 162.40-162.55MHz with alert function. It does not receive single-sideband signals. It offers 100 FM memories, 100 LW memories, 100 MW memories, and 300 SW memories. Further, it offers 1, 2, 3, 4, and 6 kHz bandwidths on MW and SW bands.

On the left side of the front panel is a plastic grill that fronts an inch-and-a-half speaker. On the right side is a small LCD screen with backlight that functions as information central for the D109-WB. Below it are 15 buttons (3 rows of 5 buttons each) that control various functions, including an “SOS Emergency Distress Sound and Light Alarm,” manual tuning and various auto scanning and auto memory storage schemes, band selection, DX/local receive mode selection, 9/10 kH MW spacing, clock alarms, bandwidth selection, a key lock/display switch, and a manual tune/memory mode switch, among others. Below those 15 buttons is a 3 x 4 numerical key pad for memory and direct frequency entry functions. To the right of the keypad are 5 buttons set in a circular pattern for controlling Bluetooth use and connectivity and MP3 playback (I did not test these last two functions).

On the right side of the case, you will find a type-C socket for plugging in a cable to charge the 18650 battery, a wheel for volume control, and a tuning knob.

On the left side of the case are 3.5 mm headphone and external antenna jacks.

On the back panel is a flip-out support and a hatch for accessing the battery. On the top, there is a fold-over 21-inch telescoping antenna and, on the bottom, two anti-skid rubber feet.

In all, I found the D109-WB to be solidly constructed with fit and finish appropriate to a radio in its price class. The only serious deficit I found in the D109-WB was the extremely small type in the owner’s manual. Consult the photograph below to see what I mean.

The D109-WB was straightforward to operate, and I enjoyed it. One cute trick was variable-speed tuning: on MW, turn the knob slowly, and it will change frequency in 1 kHz increments. Turn the knob fast, and the tuning rate jumps to 10 kHz increments (or 9 kHz, if you have selected that tuning option). Variable-speed tuning works the same way on the shortwave bands, and on the FM band, the slow tuning rate is .01 MHz, and it jumps to .1 MHz when the knob is turned quickly. I had not experienced variable-speed tuning in any other radio, and I like it . . . a lot.

But what I was really wanted to know was how well did the D109-WB perform?

Now here’s the rub: I don’t have any test equipment . . . but I do own a CCrane Skywave 2. So I sat down on a bright sunny afternoon with the D109-WB and the Skywave 2 side-by-side and compared them. I found that both would receive two weather channels loud and clear and one more weather channel marginally. Then I tuned firm the medium wave band, then the FM band, running the two radios in parallel and found that there was nothing that I could hear on Skywave 2 that I could not also hear on the D109-WB, and vice versa. In other words, I found the electrical performance of the two radios to be very similar . . . except, of course, that the Skywave receives the AIR band, and the D109-WB does not.

One of the things that I enjoy doing is to grab a radio, select a band, punch the SCAN button, and see what’s out there. Since I also own a Tecsun PL-880, I decided to run a scan on each band on each radio (D109-WB, Skywave 2, and PL-880) with its native whip antenna and see how many detectable signals I could find on each. By “signal,” I mean any place where the scan stopped where I could hear music, voices, or anything that sounded like a transmitted signal, as opposed to pure noise.

So here are the results of two different testing sessions on two different nights:

D109-WB vs. CCrane Skywave

D109-WB vs. Tecsun PL-880

A caution: before you start drawing conclusions from the results above about which radio is more sensitive than another, it is important to consider that those results may be heavily skewed by whatever “SCAN” algorithm is programmed into each radio. Further, the parameters of the SCAN algorithm for a particular radio are a black box to those who use the radio. What I can conclude from those results is that, if you want to be a lazy DXer like me and use the SCAN button for cruising the bands, the D109-WB will deliver pleasing results.

Since the D109-WB has a socket for plugging in an external antenna, I plugged in a 45-foot loop antenna. The D109-WB overloaded, but when I set the DX/local switch to local, the overloading went away but there was still a boost in signal-to-noise from the external antenna.

So, the bottom line: the XHDATA D109-WB delivers a whole lot of fun and performance at a very reasonable price, and I can easily recommend it for both newbies and old-timers alike.

In fact, if you want to turn a kid onto radio, here’s an idea: give the child a D109-WB and a paper atlas, explain how both work, then set that kid to work logging as many stations as possible and looking up where they are located. Heck, that sounds like fun to me.

Click here to check out the XHDATA D109-WB on Amazon.com

(note: this affiliate link supports the SWLing Post at no cost to you)

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Video: Giuseppe explains wiring/construction of DICA Homebrew Antenna

1 Reply

Many thanks to SWLing Post contributor, Giuseppe Morlè, who writes:

Dear Thomas and SWLingPost Friends,

I’m Giuseppe Morlè iz0gzw,

Many friends have asked for the DICA wiring diagram after my recent post and demonstration.

I’m not a technician but a simple passionate listener and qrp’er… I made this video with a drawing that I hope will be useful to understand the details and how it works…

[Please note that this video is in Italian, but you can use YouTube Closed Captioning; it can even translate the subtitles into English or any other language.]

Thank you all.
Giuseppe iz0gzw.

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GE Superadio: Purchasing Used Models for Restoration and a New Groups.io Discussion

3 Replies

Many thanks to SWLing Post contributor and supporter, Chuck Rippel (K8HU), who shared the following comment on this post regarding his excellent Superadio restoration services. I wanted Chuck’s comment to get more visibility, so I am reposting it here (hope you don’t mind, Chuck!).

Chuck comments:

A number of folks have written, asking if I have any radios to sell. Every now and again, there is a model 1 or model 2 (they are electrically identical) that I offer for sale.

However, there is a better approach to obtaining a restored SR-1 or 2. Go up on E-Bay and look for a nice GE SR and have the seller ship it to me after you purchase it. Make SURE the seller encloses a note with your purchase with your name and contact information so I know to whom the radio belongs.

This one caught my eye and would be a worthy candidate for restoration and to add to a collection:

https://ebay.us/Mx7VEW

[Note: the eBay Partnership link above supports the SWLing Post at no cost to the buyer]

It’s also an excellent example of a decent SR being sold 2nd hand.

Couple things to watch for:

Shipping charges in excess of $20. Save for coast to coast or a rural area, $20 is about the reasonable limit. Many of the radios are picked up by people wandering through estate sales, thrift shops, garage sales, etc…. who have no idea what they are buying. Many see “GE Super Radio” and put it on E-Bay simply because the radio carries the “Super Radio” label. I would guess that is why there are so many Super Radio model 3’s on E-Bay. Those were made by RCA with a GE label printed on them but their performance is sub-par to the model 1 or 2.

Finally, if you have a SR-1 or 2 you’d like me to work on, drop a note and I’ll send you back a 2 page FAQ. It outlines what will be done, how to ship it and pricing which includes a couple of options from which to choose. Please read and understand the FAQ before shipping. If you decide to send it, please do it promptly and let me know it’s coming. I ask you to include your POC information with the radio and that’s best done on a word processor or note pad then printed. Sometimes, handwritten script is a bit difficult to read.

I’ve gotten radios with no return address or POC sent from a UPS store, (who does that go back to?). There are a few options from which to choose and I strongly recommend 1, having Conformal Coating applied to the solder side of the PCB’s. Solder is hydroscopic and can absorb moisture over time and we won’t get into battery acid. My conformal coating is similar to the “MFP” process used on certain mil-spec electronics save that unlike MFP, I only apply coating to the solder side of the board. A board treated to MFP has both sides coated.

Ok, now a general question:

I created a Groups.io page where those interested in the 2 GE Super Radios can share their experiences. The initial invitations went out, give it a couple days but if you did not get one and are interested, drop me a note. My e-mail address is in several location on this blog [including in this post].

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Mediumwave DXer logs KFIZ from Arctic Finland

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Many thanks to SWLing Post contributor, Ulis Fleming, who shares the following article from KFIZ via Twitter. I love these articles where a mediumwave DXer blows the minds of a small AM radio station’s staff!

Finnish man hears KFIZ radio transmission on radio in Artic Circle

A man from Finland contacted KFIZ recently to let us know he was listening to our station IN Finland earlier this month. And while it doesn’t sound like such a big deal since we do announce you can listen around the world on the “Tune In” app, this person actually heard us on the AM spectrum of frequencies.

Jari is a self described AM radio enthusiast in Finland that says he is passionate about listening to and identifying AM stations from around the world.

In early December, Jari travelled about 750 miles from his home in southern Finland, by train and car, to an isolated area in Northern Finland, well into the Artic Circle, where he has a base station set up designed to pull in AM radio signals from around the world. Jari says conditions are ideal there because there is ample space for long antennas and little to no man-made electrical noise or interference.

On December 4th at 6:00 Universal time, which would have been midnight local Fond du Lac time, Jari recorded a transmission on his receiver. Its very faint but it’s our station’s radio ID that we play often throughout the day that says “News Talk 1450, KFIZ Fond Du Lac – a Mountain Dog Media Station.”

Given how hard it is to hear, you can respect the fact that Jari now has transmissions confirmed from over 800 stations from North America.

While generally AM radio waves only travel at most 100 miles from the transmitting antennas, with the right conditions, usually during the nighttime hours, AM radio waves can reflect off the ionosphere and propagate past the curvature of the earth, a phenomenon called “skywave” propagation.

So from all of us here at KFIZ, if you are listening locally, on the tune in App, or isolated deep within the Artic Circle, we want to say thanks for listening.

Click here to read at KFIZ.

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Radio Waves: Agriculture Supports AM, In-Car Radio Listening, Making Waves, and AI Future at the VOA

Radio Waves: Stories Making Waves in the World of Radio

Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Dennis Dura, Rich Cuff, and Dan Robinson for the following tips:

Ag Coalition Speaks Up for AM Radio Bill (Radio World)

Access to radio becomes even more important for America’s producers in times of emergency.

Producers of milk, wheat, cotton, sugar, corn, rice and many other farm and ranch products in the United States are speaking up in support of the federal legislation that would require AM radio in new vehicles.

Twenty-five agricultural groups have sent a letter to Capitol Hill endorsing the AM Radio for Every Vehicle Act. (Read the letter.)

The National Association of Broadcasters highlighted the letter. It said the bill has 196 cosponsors in the House and 44 in the Senate.

“Our members rely on AM radio and the vital services it provides daily,” they wrote.

“AM radio is a source of weather, commodity and national farm policy updates for our members. Access to radio becomes even more important for America’s producers in times of emergency.” [Continue reading…]

AM/FM In-Car Listening Surges to Pre-Pandemic Norms (Radio World)

Edison Research releases its latest “Share of Ear” data

Pierre Bouvard is chief insights officer for Cumulus Media and Westwood One. This story originally appeared on his blog.

Edison Research’s quarterly “Share of Ear” study is the authoritative examination of time spent with audio in America. Edison Research surveys 4,000 Americans annually to measure daily reach and time spent for all forms of audio.

Since “Share of Ear” has been running continuously since 2015, it affords an opportunity to examine an eight-year view of American audio usage. Here are the major trends:

The proportion of in-car AM/FM radio listening has surged from the prior year to pre-pandemic norms
For all ad-supported audio, the proportion of at-home listening remains elevated
Spoken word is on the rise: All forms of non-music content (News, Personalities/Talk, and Sports) increased strongly during the pandemic; Since then, spoken word growth has accelerated
Podcast shares are up +575% since 2016
Pandora/Spotify ad-supported music streaming shares are down -31% over the same period
AM/FM radio streaming’s audience share is now greater than Pandora/Spotify combined
At a 69% share overall and a massive 85% in-car share, AM/FM radio remains the dominant ad-supported audio platform. [Continue reading…]

Still making waves after 100 years (Mail and Guardian)

South Africa first came into my life as a young boy in Canada for two reasons.

One, I had an uncle who worked for a shipping company. Among other things, the company imported goods from and exported goods to South Africa.

A ship carrying South African tinned pineapple, bound for Montreal, sank in the St Lawrence River in the 1960s. My uncle was involved in the salvage operation, and, as a consequence, my family and many other relatives ate tinned pineapple from South Africa for the next few years — we grew to hate it.

The second reason was radio. My grandfather gave me a shortwave radio when I was about eight years old. One of the distant radio stations that blasted into my bedroom, loud and clear, was Radio RSA (now Channel Africa), the voice of the South African government of the day.

I listened to Radio RSA, as I listened to any shortwave station I could pick up, because it was exotic.

The easiest stations to pick up in those days were from the big broadcasting countries — the BBC, Radio France Internationale, the Voice of America, Radio Moscow and Radio Havana Cuba, to name but a few. Even Albania had a strong-signal broadcaster — Radio Tirana. [Continue reading…]

VOA faces internal backlash over newsroom guidance on use of generative AI to voice news reports (FedScoop)

Journalists at VOA have pushed back on newsroom leadership’s AI policy regarding “synthetic voices,” documents obtained by FedScoop show.

Dozens of journalists and staff at Voice of America are strongly opposed to the state-owned news organization’s plan to use AI-generated synthetic voices, documents obtained by FedScoop show, with employees expressing concerns that the tool could breed mistrust with its audience, cause misinformation to spread and potentially eliminate jobs within the newsroom.

VOA, which has a weekly worldwide audience of approximately 326 million, is the largest and oldest of U.S. government-funded news networks and international broadcasters.

The news organization released internal guidance on the use of artificial intelligence in November, following months of discussions with journalists and labor representatives that stirred up backlash and controversy within the news organization.

FedScoop obtained the new AI guidance as well as a letter of opposition — signed by dozens of journalists within the news organization — that was sent to VOA leadership in October and has not been made public until now.

“We are deeply concerned that a portion of the Artificial Intelligence guidance that the agency is preparing to issue will do more harm than good,” the signed letter said. “Specifically, we object to language that would allow Artificial Intelligence to be used ‘for voicing scripts.’” [Continue reading…]

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KGGF’s Old-Time Christmas Radio Drama and Music!

“Interference Wars”

Many thanks to a number of SWLing Post contributors who have shared this article from Tedium.co which takes a deeper dive into the issues and politics surrounding AM radio in EV automobiles in the US.

Click here to read the full article on Tedium.

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