Tag Archives: AM Radio

Digital AM: FCC takes a closer look

Many thanks to an SWLing Post reader who writes:

Thought you and the SWLing bunch would be interested to learn about this. The promoters make it sound so go, but fail to mention all the problems and pitfalls. Hopefully, it will go nowhere, which is the best course possible!

(Source: Inside Radio)

The prospect of a digital-only AM station may still be far on the horizon, but if it one day becomes reality the first step to securing regulatory approval has just occurred. The Federal Communications Commission has put up a proposal submitted by Texas broadcaster Bryan Broadcasting last month for public comment. It’s not a formal rulemaking, but the process could lay the groundwork for a FCC decision allowing digital-only AMs in the future.

In a petition filed last month, Bryan Broadcasting VP and general Ben Downs said giving stations the option of dropping their analog signal would provide struggling AM owns an “innovative tool” with which to compete. Broadcasters will have until May 13 to chime in on what’s been docketed as RM-11836.

Downs says he’s pleasantly surprised to see the FCC moving so quickly on his petition. The proposal drew some attention among engineers at last week’s NAB Show, although agency staffers were less committal. That made it all the more encouraging when Downs returned from the Las Vegas convention to learn the Media Bureau opened it up to comments.

“It was clear from the discussion panels that unless there’s interest shown in this 30-day comment period, we will not have this approved as a licensed option,” Downs said. “I don’t think anyone questions the all-digital MA-3 option from a technical feasibility position anymore, separate from the hybrid mode that is authorized. So I would hope the Commission would recognize that this is the next logical step in the AM Revitalization effort.”[…]

Click here to read the full article at Inside Radio.

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Japan Commercial Broadcasters Association asks gov’t to abolish AM radio requirements by 2028

(Source: Japan Today via Bill Mead)

The Japan Commercial Broadcasters Association on Wednesday urged the government to allow them to abolish costly AM radio by 2028 amid falling revenues.

Many broadcasters are struggling to maintain both AM and FM radio services. “Resolving the overlapping investment for AM and FM radio services is essential,” an official of the association said in a meeting held by the communications ministry.

The association also called on the government to take measures to conduct an experiment to stop broadcasting AM radio in some areas in around 2023.

If the government approves the necessary legal change, FM complementary broadcasting, currently used for fringe areas of AM radio and as a disaster countermeasure, could be standardized as FM radio while AM radio services are terminated in most areas of Japan.[…]

Continue reading the full article at Japan Today.

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Fred Jacobs on “Rekindling Our Fading Romance With AM Radio”

Many thanks to SWLing Post contributor, Dennis Dura, who shares the following article which appeared in Jacob’s Media Strategies on Dec 31, 2018. I’ve pasted an excerpt below, but you’ll want to read the entire piece by clicking here:

Rekindling Our Fading Romance With AM Radio

I know I may sound like a relic from another era, but chances are if you’re a Baby Boomer (or gasp – even older), you were inspired by AM radio as a kid growing up whether it was in a big city or a small town.  If you’re a member of a younger generation, you may not even know that AM – or amplitude modulation – has a magic power.  At night when the clouds are just right, AM signals have the ability to “skip” across geography, unlike frequency modulation (FM) which is line of sight.  “Clear channel” stations had an even easier time being heard beyond their metro confines – often covering many states during the nighttime hours.

Many of us radio veterans remember those nights, lying in bed, where your trusty bedside AM clock radio pulled in signals from all over the U.S. As a boy in Detroit and not especially well-traveled, I learned how to pronounced Des Plaines (Des-planes) and Touhy (2E) by listening to Chicago radio stations like WBBM and WLS.  Tuning in KYW in Philly (which came in “like it was next door”), I learned how to spell the quirky town of Conshohocken from listening to Phillips Ford commercials.  It was from a jingle that got in your head (CON-SHO-HO-CKEN).  At least, it got in mine.

It didn’t matter if you lived in Dallas or Des Moines, or a small town in Delaware – you were able to pick up big AM radio stations from faraway.  And if you talk to today’s broadcasters on the other side of 50, many will tell you their careers were likely inspired by these booming, exciting blowtorches on AM radio that provided a soundtrack for our teens.

AM radio was where we first heard the Beatles, the Supremes, the Stones, Stevie Wonder, and even the Doors.  Big AM Top 40 stations of the day – KHJ, WABC, CKLW, WLS – played all these cool rock songs, right next to Herb Alpert & the Tijuana Brass, Elvis, Bobby “Boris” Pickett, and the Singing Nun.  And even though the fidelity of amplitude modulation is obviously technically inferior to that of FM, there was something very different and even romantic about hearing all those songs first on AM radio.[…]

Continue reading the full piece at Jacob’s Media Strategies.

Thanks for the tip, Dennis! I think this piece speaks to so many of us radio listeners–especially this one who prefers the “fidelity of amplitude modulation” over so many other mediums.

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AM receiver design with regards to IBOC bandwidth claims

Many thanks to SWLing Post contributor, Emilio Ruiz, who writes:

Hi Thomas,

I’m writing because found this (interesting) analysis about radio
components and the impact on radio receiver quality:

http://www.geocities.ws/shreddermanrulz/myth1.htm

I think may be are interesting topic for readers of the SWLing Post.

This is interesting, Emilio.  Thank you for sharing. Although the reason the author put together this post was to refute IBOC’s claims about testing AM receivers, it is also a fascinating look into cheap AM radio/receiver design.  Thank you for sharing!

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WSJ: AM radio and electric cars don’t mix

(Source: Wall Street Journal via Bob LaRose W6ACU

Cars and AM radio go back a long way, but there’s a rough road ahead for the old travel buddies.

The same types of electric-powered motors that propel Teslas past 150 mph and the Chevy Bolt as far as 238 miles on a charge, are a total buzz kill for AM reception. Instead of sports, oldies or news, it’s more like all-static, all-the-time radio.

As auto makers race headlong into an electrified future, AM radios are getting kicked to the curb, joining cassette decks, eight-track players and ashtrays.

Daniel Rich is a fan of both San Francisco’s KNBR-AM 680 and his Chevy Bolt. That means his commute isn’t as easygoing as it used to be. “All my other cars over the years could receive that station just fine, despite the distance,” the 58-year-old eye surgeon said. “Not the Bolt.”

A General Motors Co. spokeswoman said GM was aware of the issue in the Bolt and has “taken steps,” but declined to say exactly what they are.[…]

Click here to read the full article at the Wall Street Journal.

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Review Update: CCRadio-EP Pro’s major improvements!

In April, I posted a review of C. Crane’s latest iteration of the much-loved EP series: the C. Crane CCRadio-EP Pro.

Although the new Pro model had the makings of a great, simple DXer-grade receiver, the first production run was plagued with issues that, in the end, prevented me from recommending it to radio enthusiasts and DXers. Frankly speaking, I was quite disappointed.

I evaluated the original CCRadio-EP Pro over the course of several weeks, documenting my findings in detail and sharing them with C. Crane both during the evaluation period and in my full review.

But to C. Crane’s credit––being a company of integrity––they responded to each point of criticism, promising to address the issues in the receiver’s second production run.

Enter the second production run…

About six weeks ago, I took delivery of a second-production-run CCRadio-EP Pro.

The second-run units have actually been shipping for a few months now, but due to nearly two months of travel and a hectic schedule following, my evaluation took longer than I had hoped. And if you’ve been following the SWLing Post for long, you’ll have noticed that I never rush a radio evaluation…and for good reason. Post readers are placing their trust in my review, so I must feel confident it’s as accurate––and as transparent––as I can make it.

Speaking of transparency, by the way, please note that C. Crane provided the initial and second production evaluation units at no cost to me.

What follows is a review of the second-run CCRadio-EP Pro. I would encourage you to read my original review before proceeding, because I am (only) addressing all of the negatives I listed from the previous review.  However, for your convenience, I’ve included quotes from the original here.

In a nutshell?  C. Crane listened to my list of concerns, and I’m very pleased!

Muting between frequencies?

 

From my first production run review:

[M]echanically-tuned DSP radios, like the new CCRadio-EP Pro, may look like analog sets, but inside, they’re entirely digital. And one drawback to all of the mechanically-tuned DSP radios I’ve tested so far is a tendency to mute between frequencies. With each 10 kHz frequency step, you’ll hear a short audio mute. If you tune across the dial quickly, audio mutes until you land on a frequency.

I’m pleased to report that C. Crane has significantly decreased the amount of muting between frequencies. Indeed, even on the AM band (which was most affected in the first production run), muting no longer distracts me from the experience of band scanning.

Unlike an analog receiver, if you tune quickly across the band, the EP Pro essentially mutes audio completely.  This is common with analog-tuned DSP receivers. This is still the case with the second production run unit, but this does not concern me, as I rarely move quickly across the bands while hunting weak signals.

Imaging?

From my first production run review:

Crane actually includes a note about weak images which you might find below and/or above your target signal. Weak images are an unfortunate reality of the CCRadio-EP Pro; they’re prevalent on both AM and FM.

On the initial production receiver, here’s how you might experience the images by way of example: let’s say you’re tuning to a strong local AM station on 630 kHz, noting that the EP Pro has 10 kHz tuning increments. As you tune to 630 kHz, you’ll hear the station on 620 kHz, though it won’t be as strong as it is on 630 kHz. Then if you tune to 640 kHz, you’ll likely hear a weaker image of the station there, as well. In my experience, images are present on both sides of the target station if the station is strong. If it’s a weak station, you might only hear it, say, 10 kHz lower but not above (or vise versa).

As you might imagine, this poses a problem for the weak signal AM broadcast band DXer.

I’m pleased to report that C. Crane has eliminated the false peaks around signals. This was a major negative from the original review. Now, as you tune across the bands, it feels more fluid, and when you hear a station you can be confident you’re actually on frequency as it seamlessly “locks” into place.

Well done, C. Crane!

Inaccurate dial?

At the top end of the band, the EP Pro tuned to 1600 kHz

From the first production run review:

I’ve also discovered that, on my unit, the top half of the AM dial is inaccurate. I estimate that the slide rule dial is off by about 40-50 kHz at the top end of the band. It’s much more accurate below 1,200 kHz, however.

I’m pleased to report that the dial on this second production run unit is now as accurate as any analog radio. I tested frequency accuracy across the entire AM/FM bands, and can reliably find stations. Another major negative C. Crane fixed!

Audio “pop” with power on?

From the first production run review:

[A]ny time you turn on the CCRadio-EP Pro, you’ll hear an audio “pop.” This is happening when power is applied to the audio amplifier. The pop is not soft, but fairly audible, and is present even if you turn the volume down all the way. The audio pop is prevalent via both the internal speaker and when using headphones. Fortunately, it’s much less pronounced via headphones.  While not a major negative, I find it a bit annoying, and don’t doubt that other listeners will, too.

C. Crane has managed to minimize–not eliminate–the audio pop. It’s much improved over the first production run unit. I think I would still make note of it in the “cons” section if this were my first review of the radio, but it’s truly a very minor complaint at this point.

AM frequency steps limited to 10 kHz?

Note the new 9/10 kHz switch below the AM Antenna switch

From the first production run review:

My initial production run EP Pro is limited to 10 kHz frequency steps. This radio is primarily marketed to North America where 10 kHz increments are standard. Of course, if you’re trying to use the EP Pro to snag Transatlantic or Transpacific DX, you’ll miss the ability to tune between those broad 10 kHz steps. But, again, due to the imaging mention above, I think the CCRadio-EP Pro is simply not suited for DXing.

I’m pleased to report that C. Crane has added a switch that allows the listener to toggle between 9 and 10 kHz AM steps! This was an essential upgrade for those of us planning to use the CCRadio-EP Pro outside North America, or for those of us attempting to chase signals from across the ocean. Very nice, C. Crane!

Conclusion

To their credit, C. Crane has addressed all of the major negatives I listed in my review of the first production run units.

And as a result, I can now recommend the CCRadio-EP Pro with confidence.

I should add that during the course of this evaluation, I spent some valuable time on the mediumwave/AM broadcast band and have been very impressed with the EP Pro’s sensitivity and selectivity. The AGC can cope with weak signals quite well; I noted none of the soft muting which plagues a number of other DSP receivers. And the Twin Coil Ferrite tuning can substantially improve reception of weak signals––don’t ignore that control on the right side of the radio! Very useful.

With renewed confidence in the EP Pro, when I have time this fall or winter, I plan to take it to the field and pit it against my beloved (and recently re-capped!) Panasonic RF-2200. I’m beginning to think it might be a real competitor. We will see.

I would encourage you to also check out Guy Atkins’ recent evaluation of the EP Pro. I’m in agreement with his assessment, which leads me to believe quality control is also consistent in the production run. Good news all around. I’m very happy that C. Crane fixed early production run issues with both the CCRadio-EP Pro and the CC Skywave SSB. Well done!  I’m so glad C. Crane paid attention.

You can purchase the CCRadio-EP Pro from the following retailers:

How to identify a second (or later) production run unit

I know I’m going to receive emails and comments about how to tell if one has a first or second production EP Pro. The answer is very simple…

If your unit has a 9/10 kHz step switch on the back (see photo directly above) then you have a second production run unit or later.  

While the first production run EP Pro will please most average radio listeners, I couldn’t recommend it for the level of radio enthusiast and DXer who spends time reading reviews on the SWLing Post.

If you plan to purchase the CCRadio-EP Pro this year, I would encourage you to check with the retailer to make sure you’re getting a unit from the second production run or later.


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NY Times Op Ed: “My Love Affair With AM Radio”

Many thanks to a number of SWLing Post contributors, including The Professor, Patrick Stenbacka, and Larry W, for sharing a link to this opinion piece in the New York Times by author Erin Aubry Kaplan:

LOS ANGELES — Like many people who grew up in the 1970s, I came of age with AM radio. Everybody I knew — the black kids on my block, the white and Asian kids at my junior high school — followed the Top 40 and discussed the merits of the newest releases by Elton John and Eddie Kendricks.

[…]At home, the kitchen-counter radio was always tuned to KABC. It aired restaurant shows, call-in psychologist shows, news shows, all featuring sophisticated discussions of things I had only vague ideas about. My mother listened while she ironed or cooked or sat at the table paying bills. The radio was her company, and because I admired her (but didn’t quite know how to talk to her), it became mine, too.

To my ears the hosts — people like Michael Jackson, Dr. Toni Grant, Geoff Witcher — sounded like my mother: impassioned but thoughtful, often witty, opinionated but not obnoxiously so.[…]

Read this full Op Ed piece at the New York Times.

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