Tag Archives: FM

Review of the RadioShack AM/FM portable digital radio, Model 12-587

The RadioShack Model 12-587 AM/FM Radio

The RadioShack Model 12-587 AM/FM Radio

Three days a week, my father––now in his seventies––takes a three mile walk through his home town, revisiting the neighborhoods of his youth. He began the walks upon retirement, and in my opinion, the routine has helped keep him in great shape. When he first started walking I learned he was carrying around a heavy AM/FM radio with him.  I bought him a bargain one-off Coby AM/FM portable that is not only lightweight but sports a handy neck strap. Dad’s loved it. Indeed––much to my surprise––it’s lasted about ten years, and is still playing, although starting to show signs of wear…

So I decided it was time to test drive a suitable replacement. After searching, I found the RadioShack Model 12-587 AM/FM radio. At a clearance price of $14.99 (US), there will be no loss of sleep if Dad misplaces it or drops it on the pavement.

Still, I couldn’t resist giving it the once-over, and thought I might share the mini review that resulted. As I always say for radios in this price range, my expectations were low.

Here’s a summary of this little AM/FM radio’s pros and cons:

Back of model RadioShack 12-587

Back of model RadioShack 12-587

Pros:

  • Very good FM selectivity and sensitivity
  • Excellent FM stereo lock
  • Scan function both useful and quick
  • 10 AM and 10 FM memories (see con)
  • Large, amber back-lit LCD display
  • Simple control lock switch on right side
  • AM (medium wave) sensitivity adequate
  • AM nulling above average
  • Plastic “blister” packaging very easy to open!

Cons:

  • Tinny sounding audio via built-in speaker
  • Headphone audio lacks high/low; mid-range only
  • Memory allocations supposedly volatile (when batteries are replaced)
  • AM frequency steps fixed at 10 kHz (cannot adapt to 9 kHz steps used in rest of the world)
  • AM (medium wave) sensitivity mediocre at best
  • Complete mute while tuning; not capable of band-scanning
  • Dimple on tuning knob not useful
  • Very sensitive to noise (QRM) on the AM band, resulting in static popping/crackling in audio

Obviously, this is not a radio for the radio hobbyist or world traveler, as it lacks any real medium wave sensitivity and cannot tune in 9 kHz steps. FM tuning is also locked on odd frequencies, thus will not work throughout parts of the world with even spacing. And though the radio is touted as having “extended bass,” the audio is tinny, even via headphones.

RadioShack-Model12-587-AMFMRadio-2BUT.  This is a perfect example of a situation in which, though cons outweigh pros, the RS Model 12-587 is a great match for its intended purpose: my father’s morning walks. Why? It’s a simple-to-operate radio with a large, back-lit display (Dad won’t need to put on his glasses to read it). It receives local AM and FM stations very well. The mid-range audio––while lacking ample fidelity for music––are perfect for the talk shows he listens to while walking. The radio is durable, lightweight, easy to tune, and has a lock feature. It is also remarkably easy to program memories: simply press the program button until preset flashes in the LCD display, use the scan up/down buttons to choose a memory number then press program again.  It’s also very affordable, so no problem to replace as necessary.

In conclusion, the RS Model 12-587 is not a performance radio––and I wouldn’t generally recommend it––but it suits my father’s needs very well.  Like to walk or run? Maybe it’s just what you’re looking for, too.

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Newsweek: Can radio turn the tide in Syria?

Syria_(orthographic_projection)Thanks to The Professor for sharing this brilliant article by Mike Giglio in The Daily Beast:

“Twenty minutes—this was the small window of time that Majid (not his real name) usually gave himself to broadcast his radio dispatches and then flee. The Syrian was making a name for himself as a bold, young journalist in Damascus, venturing into contested neighborhoods in the capital’s war-torn suburbs to deliver his reports. The broadcasts were low tech and old-fashioned, produced for an upstart radio station called Al-Watan FM, or “The Homeland FM,” and went out on the local airwaves, crackling into a sphere otherwise tightly controlled by the regime. Any Damascus resident scanning the dial could tune in.

It was dangerous work. Pushing into the capital’s FM frequencies meant transmitting an easy-to-track signal from within the city. Government soldiers or regime thugs often came looking for Majid when he went on the air, so he tried to be quick—setting up, going live, then packing up and disappearing within the span of 20 minutes.”[]

Continue reading the full article in Newsweek’s The Daily Beast online.

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Mystery radio identified

Click to enlarge.

Click to enlarge.

Wow, that was quick! Many thanks to Ulli who solved the case of the mystery radio we posted yesterday.

Ulli comments with details:

The radio was a giveaway about 1995.
I opened it :
1 IC Sony CXA1191S 314J22V , 5 Transistors , 3 -band filter , 5.5 cm speakers , 8ohm , 0.5 W.
Today’s AA batteries are a bit too long, the 3 AA not quite fit into the battery tray .
The display with the time can be tilted .
On the back is a sticker :
AM / FM CLOCK RADIO LCD , DC POWER SUPPLY , RADIO DC 4.5 V, 1.5 V DC CLOCK ,
ART No. 05796-07 , CENTRON LABORATORIES LTD .
and on housing :
U.K.REG.NO.2013420 .

Thanks, Ulli!

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Bill helps with low-power, license-free broadcasting

HobbyBroadcasterIn reference to our post, Dave’s FM Station Empire, SWLing Post reader Bill writes:

Nice article on the use of low power broadcasting. For the last 5 years my site, HobbyBroadcaster.net, has been helping radio enthusiasts along with schools and businesses learn how to use legal, low power, license-free Part 15 radio for a variety of uses. I created the site due to my involvement with starting a campus-limited high school station and discovering the lack of quality resources available for school-based broadcasters unable to obtain an FCC allocation. With many hobbyists also using this same technology on AM to serve their neighbors with micro radio it only seemed natural to expand the interest to hobbyists, too.

Also, Part 15 regulations allow for some use of the shortwave bands for experimental broadcasting with the most common frequency used by hobbyists being 13.56 MHz.

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RootIO: community powered micro radio stations

RootIOThanks, Benn, for sharing this:

Radio continues to be a powerful tool for community information, and the RootIO project amplifies it by mixing its power with new mobile and Internet technologies. RootIO is an open-source tool kit that allows communities to create their own micro radio stations with an inexpensive smartphone and transmitter, and to share, promote, and collaborate on dynamic content. The project will be piloted in Uganda in partnership with the Uganda Radio Network, UNICEF Uganda and UNICEF Innovation Unit.

http://www.knightfoundation.org/grants/20123667/

http://rootio.org/

https://twitter.com/RootioRadio

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FM pirate jamming people out of their cars

keychain-keyless(Source: SunSentinel)

It was a mystery no one could solve — until now.

For months, dozens of people could not use their keyless entry systems to unlock or start their cars whenever they parked near the Hollywood Police Department. Once the cars were towed to the dealers, the problem miraculously disappeared.

Police have since cracked the case.

Turns out the problem wasn’t with the cars, the batteries or even user error, but an illegal pirate radio station that was jamming the signal from keyless entry systems of several makes of cars, including Lexus and Toyota. The man behind the bootleg operation likely had no idea it would lock people out of their cars, police say.

Lynn Jacobson, who lives on Van Buren Street a mile west of police headquarters, was frustrated for months trying to get into her car.

“It was happening every day,” Jacobson said. “We were getting desperate. It got to where every time I went out to the car I’d say, ‘Please let it open.'”

Detectives are still searching for the man who set up the bootleg station on the roof of the eight-story Regents bank building at 450 Park Road, a block north of police headquarters. The station was broadcasting Caribbean music around the clock through 104.7 FM, police say.

If found, the man could be arrested on felony charges and face a fine of at least $10,000 from the Federal Communications Commission. [Continue reading…]

Note that it’s not just pirate stations that unintentionally jam keyless entry. I know an AM broadcaster on 1290 kHz that blocks keyless entry on many GM cars for a one mile radius around their tower. Doesn’t seem to bother Toyota, though. Guess they prefer FM pirates.

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