Monthly Archives: September 2015

Review: the Waka Waka Power+ portable solar charger

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In my role as director of our 501(c)(3) charity, ETOW, I’m always on the lookout for technologies that could improve the lives of those living at or below the poverty line in remote and sometimes politically-charged regions of the world that are usually off-grid. At ETOW, we prefer simple, rugged technologies that require no learning curve, that can be easily maintained, and that offer exceptional benefit to our users. Self-powered radios, of course, are  ETOW’s mainstay, but we’ve also provided digital recording and playback devices, solar and hand-cranked power generation, and, of course, lighting.

When I first learned about the Waka Waka Power+, I had ETOW in mind. I reached out to Waka Waka and they sent a sample for me to evaluate.

The flip cover has detents which allow you to angle the solar panel for optimum solar tracking.

The flip cover, which acts as a stand, offers detents which allow the user to angle the solar panel for optimum solar tracking.

The Waka Waka Power+ is a small, lightweight portable power supply built on a 2200 mAh LiPo battery pack. A built-in solar panel occupies one full side of the device, which charges the battery when placed in sunlight.  On the other side of the device–behind a flip cover–is a large round power button and two protected Cree LED lights.

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After charging my Tecsun PL-380, the Power+ still had about 50% of its battery available.

On top side of the Power+ is a row of four green LEDs that indicate the battery level.

The body seems to be made of a very durable plastic designed to operate in temperatures up to 80 °C (175 °F). It has a smooth surface and gasketed USB ports. The LEDs are protected behind clear lenses.

Flashlight

Let’s face it: operation of this flashlight is dead simple.  No learning curve here, which suits ETOW’s use brilliantly.  And brilliance, indeed, is what the device provides.

Press the large power button once to check the battery status; press twice, and the LED lamps are activated at their brightest setting–about 70 lumens, which lasts about 10 hours on full charge.

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Each consecutive press decreases the LED brightness for a total of four brightness settings. The lowest LED setting (about 5 lumens) is perfect for reading, and should increase the light’s longevity to approximately 150 hours with a full charge.

Emergency?  If you press and hold the power button for two seconds, the Power+ will flash “SOS” in Morse Code.

The Power+ also has a hole in the tilt base that allows you to perch it on top of pretty much any bottle and become a table lamp.

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I used a bottle of single-malt, but any bottle will do!

You can also loop a string through the central hole and hang the Power+ from the ceiling–or the roof of your car or tent–for an overhead lamp. Fantastic design for useability!

Charging

The Power+ has two USB ports:

  • a micro USB for charging the Power+ from any other USB charger (cell phone charger, USB port on PC, etc.)
  • plus a full size USB port to charge other devices on the go (your smart phone, or–for our purposes–a shortwave radio)

If you plug your Power+ into a typical smart phone charger or a USB port on your computer, it will charge the battery in about four hours.

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If you’re on the go, or simply want to go green, you can charge the Waka Waka Power+ internal battery with the solar panel directly facing the sun. It takes about two days of sunny skies to fully charge the Power+.  But you can use it even if not fully charged.

Most of the time I’ve used solar power to charge, I started with a battery at 50%–it took perhaps five to six hours of sunlight to bring the battery to full capacity.

Summary

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The Waka Waka Power+ is the first solar-powered portable charging device that has actually impressed me. I’ve tested numerous flashlights and portable battery packs over the years; many have been effective as smart phone chargers, but were heavy or unstable (one, for example, literally melted down on my bed while charging–no kidding).

Clearly, I like the Waka Waka Power+. I’m especially impressed because this seems to be Waka Waka’s first product iteration. The Power+ is small, lightweight, tough (though not waterproof) and delivers what it promises.

Negatives? Well, the only one I can think of at this point is that it takes almost two days of sunlight (at least, where I live in North America) to fully charge the Power+ via the sun. It could take longer if you live in an area with less sunlight hours. To be honest, however, I’m still fairly impressed that a PV panel as small as the one on the Power+ charges this quickly.

I’ve charged my Moto X (2nd gen) smart phone several times during my travels; it even came to my rescue when I left my phone’s mobile charger at home and had nearly depleted my battery while using the phone’s GPS to find my way in unfamiliar territory.

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I’ve also used the Power+ to charge my Tecsun PL-380, PL-310ET, and PL-880 shortwave radios. In each case, I effectively charged the radio’s battery from roughly 25% to 100%.

The Power+ easily fits in my Spec-Ops Brand Op-Order Pouch and even my Maxpedition EDC Pocket Organizer. It’s an ideal size to carry pretty much anywhere, and especially useful for one bag travel.

I also think the Waka Waka could be quite useful in some of the countries where ETOW works.  They could have especial relevance in regions where mobile phone networks are in place–increasingly prevalent in rural Africa–but our ETOW partners (teachers and community supporters) have no means of powering the phones or else can’t afford to power them. I’ll certainly order a few and test them in the field.

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The icing on the cake–? When you purchase a Power+, Waka Waka will donate a Power+ for humanitarian use (not yet to ETOW, but to other worthy organizations) through their network.  It’s a “get one, give one” deal–and believe me, this helps out.

At $79 US, this is a bargain for a cool little charger/flashlight that actually delivers as advertised.

The Waka Waka Power+ can be purchased

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Ham Radio Outlet now distributing the SDRplay RSP

SDPlay-RSP

(Source: SDRplay Facebook Page)

SDRplay is pleased to announce Ham Radio Outlet as our exclusive authorized distributor in North America. Right now initial stocking quantities are in place at 10 of their 13 stores nationwide and we plan to stock all 13 shortly.

This is excellent news for North American users as delivery will now be much quicker – no more waiting for shipments stuck in customs! This will also allow customers to get hands-on experience with the RSP in HRO’s retail stores.

Click here to go to Ham Radio Outlet’s website.

Click here to read our review of the SDRplay RSP.

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Special DRM broadcast to Europe

drmlogoMany thanks to Mauno Ritola who shares a link to the following schedule from the DRM Consortium via the WRTH Facebook page:

During IBC, Babcock will be transmitting DRM service from the UK, towards Europe.

[Friday September 11, 2015 to September 15, 2015]

  • 1600-1700 local Amsterdam time (1400-1500 GMT), BAB Woofferton, 100 kW, 6040 kHz, 114 degrees (Programme TBA)

  • 1700-1800 local Amsterdam time (1500-1600 GMT), BAB Woofferton, 100 kW, 6040 kHz, 114 degrees (BBC WS English)

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Shortwave Radio Recordings: Radio Biafra

RadioBiafraLast week, I received a tip from SWLing Post contributor, Dan Robinson: Radio Biafra, a new clandestine station, was audible on 15,560 kHz via the Universite Twente Web SDR.

Despite miserable propagation conditions, I tuned my receiver to 15,560 kHz and was surprised to hear a weak signal from Radio Biafra, here in North Carolina. I recorded a few minutes before conditions changed and Biafra’s signal began to fade.

This was the first time I had logged Radio Biafra, so I was amazed to have copy clear enough to understand.

Wikipedia has a short entry for Radio Biafra:

Radio Biafra also known as Voice of Biafra, is a radio station that was originally founded by the government of the Republic of Biafra but is currently operated by Mazi Nnamdi Kanu. Believed to have had its first transmission before the Nigeria-Biafra war, the radio station was instrumental in the broadcast of speeches and propaganda by Chukwuemeka Odumegwu Ojukwu to the people of the Republic of Biafra.

[…]Radio Biafra currently transmits via the internet and shortwave broadcast targeted majorly around Eastern Nigeria. Radio Biafra claims to be broadcasting the ideology of Biafra –”Freedom of the Biafra people”.

[…]Radio Biafra has been met with mixed reactions. While some critics have criticized the station for “inciting war” through its programmes and “preaching hate messages” against Nigeria which it refers to as a “zoo”, an editor for Sahara Reporters wrote in defence of the radio station after he compared Radio Biafra with the British Broadcasting Corporation Hausa service.

On 14 July 2015, it was reported in the media that the radio station had been jammed because it did not have a broadcast license from the Nigerian Broadcasting Commission. However, the radio station in a swift reaction labelled such claims as “lies” and went on to release its new frequency details to the public.

To put this in perspective, the Wikipedia entry for Radio Biafra is rather new, having only been created in August, 2015.

The following recording was made using my WinRadio Excalibur hooked up to a large skyloop antenna:

This two hour recording, by Dan Robinson, was made via the Universite Twente Web SDR in the Netherlands:

Post Readers: Have you logged Radio Biafra in your part of the world?

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Elad FDM-S2 on sale $499 US

Elad-Summer-Sale

While browsing the Elad website, I noticed an End of Summer sale on their US retail page.

The sale includes one of my favorite sub-$1000 SDRs–the Elad FDM-S2–priced at $499 US (originally $580). If you’ve been on the fence about purchasing the FDM-S2, this might be a good time to bite the bullet. Certainly a great value, in my book. Click here to read my review.

Note that the Elad FDM-DUO stand-alone SDR transceiver and FDM-S1 receiver are also on sale.

I don’t see an indication of when the sale ends, but I assume it may last until the end of summer. If interested, you might contact the Elad sales department to confirm.

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From Fessenden to HD Radio navigation

IBOC Spectrum (Source: GPS World)

IBOC Spectrum (Source: GPS World)

SWLing Post contributor, Richard Langley, is not only a dedicated shortwave DXer, but he’s also on the faculty of the Department of Geodesy and Geomatics Engineering at the University of New Brunswick. Additionally, Richard coordinates Innovation: a regular GPS World feature that discusses advances in GPS technology and its applications.

The latest Innovation feature is absolutely fascinating in that it highlights the potential for AM broadcast band HD radio signals (IBOC) to be an effective navigation aid. Richard’s introduction to this article takes us back to the time of Reginald Fessenden:

THE YEAR WAS 1906. On Christmas Eve of that year, Canadian inventor Reginald Fessenden carried out the first amplitude modulation (AM) radio broadcast of voice and music. He used a high-speed alternator capable of rotating at up to 20,000 revolutions per minute (rpm). Connected to an antenna circuit, it generated a continuous wave with a radio frequency equal to the product of the rotation speed and the number of magnetic rotor poles it had. With 360 poles, radio waves of up to about 100 kHz could be generated. However, Fessenden typically used a speed of 10,000 rpm to produce 60 kHz signals. By inserting a water-cooled microphone in the high-power antenna circuit, he amplitude-modulated the transmitted signal. On that Christmas Eve, he played phonograph records, spoke and played the violin with radio operators being amazed at what they heard.

Fessenden had earlier worked with spark-gap transmitters, as these were standard at the time for the transmission of Morse code, or telegraphy, the wireless communication method already in use. But they couldn’t generate a continuous wave and couldn’t produce satisfactory AM signals. But as telegraphy was the chief means of communication, they remained in use for many years along with high-powered alternators and the Poulsen arc transmitter, which could also generate continuous waves.

Continue reading at GPSworld.com…

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The vital role of radio in North Korea

North-Korea-Propaganda

Many thanks to SWLing Post reader, Ulis, who recently shared a link to this story in the DailyNK.

Here’s an excerpt:

In the case of loudspeaker broadcasts, which roiled the North, eventually leading to artillery fire, it can only be heard 25km into the North from the demilitarized zone, but in the case of radio broadcasts, many North Koreans can gain access, which is why it’s believed to a play a larger role in psychological warfare.

“After listening to the radio, I naturally found myself comparing things with the reality in North Korea,” Chae Ga Yeon (50), a North Korean defector who used to enjoy tuning into radio broadcasts, told Daily NK on Wednesday. “Having learned about things that are different from state propaganda, I took on a more critical way of thinking toward the state, and I started to realize Kim Il Sung and Kim Jong Il are not gods as the state claims. They started to look like average human beings,” she said.

“People who have tuned into broadcasts like these don’t keep the information to themselves. They share it with others,” Chae explained. “This makes other people listen in on the broadcasts as well, and they start being more critical against the state that is blocking out the information.”

Kim Seong Yeob (45) is another escapee who also tuned into these broadcasts. “North Korean broadcasts are not interesting since all they do is focus on idolization, so I enjoyed listening to South Korean broadcasts since they would share different news stories and air radio dramas as well,” Kim said. “Then I came to open my eyes to the false propaganda and developed this desire to learn more about society in North Korea and study it,” he recalled.[…]

Experts believe these broadcasts can expedite change in people’s awareness in North Korea. Given that state dominance over information is the control mechanism used over North Koreans, they believe information from outside can deal a severe blow to the North Korean system.

Click here to read the full article at the DailyNK…

Daily NK and Unification Media Group will post a series of nine articles on the effects of broadcasts to North Korea. Check the DailyNK website for updates.

As we mentioned in a previous post, the BBC has announced plans to broadcast to North Korea in the near future via shortwave. Bloomberg Business reports, however, that these broadcasts may never happen due to the potential for political backlash.

To follow all of our North Korea posts, bookmark this tag.

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