Monthly Archives: August 2016

Battery Endurance Contest Results: Sangean DT-160CL vs Sony SRF-39FP

On August 4, 2016, the same day I received my new Sangean DT-160CL, I popped a fresh set of CVS Max Alkaline batteries into the DT-160CL as well as into my trusted Sony SRF-39FP. The mission? To see which radio could perform longest on a set of batteries.

I set my stopwatch as I turned on both radios, tuned to the same frequency, set the volume to the same levels…and waited.

And waited. And waited. And as I waited, I posted updates.

But at last, the waiting is at an end: here are the contest’s final results.

Sangean DT-160CL: Impressive Performance

On August 9, I reported that the Sangean DT-160CL finally threw in the towel, logging an impressive 116 hours 30 minutes of operating time–!

Without a doubt, this is one of the longest run times I’ve ever experienced from an AM/FM radio with digital display.

Interestingly, the day after the DT-160CL shut down, I turned it back on, and it operated for an additional 45 minutes or so, obviously absorbing a little more voltage from rested cells. During that 45 minutes period of time, the audio and overall performance was respectable. No doubt the DT-160 shuts down before audio is terribly compromised.

Sony SRF-39FP: The Endurance King!

Amazingly, the Sony SRF-39FP kept running well beyond 116 hours. Well beyond…

By Wednesday morning–one full week from the time I began the endurance contest–the Sony SRF-39FP finally began showing signs of low-voltage: the audio had a small amount of splatter and sensitivity began to be compromised.

Unlike the Sangean DT-160CL, which clearly has a cut-off voltage, the SRF-39FP kept milking the battery for its last vestiges of power.

I decided that I would call a “time of death” for this AA battery when the Sony struggled to receive local AM stations, as well as transmission from my in-house SStran AM transmitter.

This happened approximately 163 hours and 54 minutes into its marathon run.

This stopwatch app tracked the full endurance test. I pressed “stop” when the Sony SRF-39FP finally gave up.

Wow, wow, wow. I simply had no idea any portable could operate almost one full week on one AA cell–!

In truth, I’m sort of relieved the ’39FP finally gave up the ghost. I was beginning to think the thing was powered by some supernatural force…

When I started this test, I thought the Sony SRF-39FP was rated for about 40-80 hours of run time on a single battery. I couldn’t remember where I got that number until I recently re-read this article from The New Yorker, which highlighted the 39FP’s role in correctional facilities:

“The SRF-39FP is the gold standard among prison radios in part because it runs on a single AA battery, and offers forty hours of listening time…”

Wait, just forty hours? Perhaps from the cheapest AA battery made…

With an advanced chemistry cell like the Duracell Quantum or Energizer Advanced Lithium series, you’ll clearly get three to four times that performance.

DX mode

And here’s the thing: I’m convinced I could’ve gotten much more time out of the SRF-39FP.

Like similar Sony portables, the SRF-39FP has a “DX/Local” switch. When set to DX, the receiver is made to deliver maximum performance.

If you’re listening to a local station, however, “Local” mode is a better choice. You’ll still be able to receive your target station, yet draw much less from the battery.

I left the Sony SRF-39FP in “DX” mode for the entire battery endurance test. Had it been in “Local” mode, I believe I’d be reporting an even longer run time. How much longer, I don’t know, but you can bet that my curiosity will soon get the best of me…I plan to do a separate endurance test to find out.

Clear choices for battery longevity

Sangean-DT160CL and Sony SRF-39FP No doubt, our little test has proven that radios marketed to the prison system do offer excellent battery performance.

Now I’m very curious whether the standard Sangean DT-160 will offer the same battery performance as its clear-cased counterpart, the DT-160CL. The only difference in the two appears to be that one offers a clock, while the other doesn’t. I wonder if that would have any significant difference on battery life.

Additionally, the Sony SRF-39FP has shown us that analog receivers can be much more efficient than their digital counterparts. We’ve known this a long time at Ears To Our World, and which is why almost all of the radios we supply to schools in remote, rural locations are analog.

Sadly, analog radios are getting much more difficult to find these days as DSP-based receivers have become more affordable to produce.

The Sangean DT-160 is available at Amazon.com and Universal Radio. The Sangean DT-160CL (the version tested) is available through Amazon.

Click here to search eBay for the Sony SRF-39FP.

Readers: Know of any other battery-miser radios? Please comment!

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Radio South Atlantic: recording of a short-lived clandestine radio station

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Crosley-Dial-BlackAndWhite

In reply to our recent post about Radio Atlantico del Sur, SWLing Post contributor, Jonathan Marks, adds:

Radio South Atlantic was a short-lived clandestine radio station started by the UK Ministry of Defence with programmes aimed at Argentine troops on the Falkland islands. This programme was broadcast from a transmitter on Ascension Island which was temporarily taken away from BBC World Service.

The Falklands War (Spanish: Guerra de las Malvinas), also known as the Falklands Conflict, Falklands Crisis and the Guerra del Atlántico Sur (Spanish for “South Atlantic War”), was a ten-week war between Argentina and the United Kingdom over two British overseas territories in the South Atlantic: the Falkland Islands and South Georgia and the South Sandwich Islands. It began on Friday 2 April 1982 when Argentina invaded and occupied the Falkland Islands (and, the following day, South Georgia and the South Sandwich Islands) in an attempt to establish the sovereignty it had long claimed over them.

On 5 April, the British government dispatched a naval task force to engage the Argentine Navy and Air Force before making an amphibious assault on the islands. The conflict lasted 74 days and ended with the Argentine surrender on 14 June 1982, returning the islands to British control. In total, 649 Argentine military personnel, 255 British military personnel and three Falkland Islanders died during the hostilities.

This is a studio copy of Radio South Atlantic. In May 1982, the British government decided to set up a Spanish language radio station targeting Argentine troops. This was probably in response to an Argentine radio station (nicknamed Argentine Annie by the UK press) which appeared on shortwave some weeks earlier using the Beatles theme “Yesterday” as a signature tune.

I was editing the Media Network programme at the time. We could hear Radio South Atlantic in Hilversum – but the signal was very weak. So I rang the British embassy in the Hague and asked if it would be possible to get a studio copy of the programme to use in a documentary feature we were making. A few days later, a courier riding a large motorbike arrived at RN’s reception and asked for me. I went down to the front-desk to sign for the tape. “But you can’t keep this tape. You can only listen to it” was the message from guy in the helmet. “I have to take it back to the Hague in about half an hour”. I said I’d look for an empty studio, gave the guy a large coffee and wandered casually round the corner. Then I made a mad dash to the fast copy-room used to make tape copies of RNW transcription programmes for other radio stations. It had a machine that could copy tapes at around 8 times faster than normal. Luckily, Jos, the guy in charge, saw my challenge, set up the machine immediately and 15 minutes later I was back in reception to return the tape to the messanger. And I had a copy.

It seems the British dropped leaflets over the Falklands to try and spread the word that this shortwave radio station existed. And we later analysed the programme. It was classic Sefton Delmer (Black Propaganda), although rather poorly presented. Bit like calling up Vera Lynne if the British had a dispute with France.

But this is one of the few surviving recordings of Radio South Atlantic. You be the judge of how effective it all was. http://jonathanmarks.libsyn.com/radio-south-atlantic-may-1992

Click here to read Jonathan’s full post about Radio South Atlantic and listen to the recording on his website.

This is an amazing recording, Jonathan. I’ll admit that I had never heard of Radio South Atlantic before and never knew a UK-supported clandestine station was on the air during The Falklands War/Guerra de las Malvinas.

Thanks for the excellent history lesson and your own (clandestine) recording!

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Icom’s announcement includes two new receivers: the IC-R8600 and IC-R30

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The IC-R8600 (Photo source: QRZ Now)

Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who shares the following info about Icom’s announcements at the Tokyo Ham Fair:

Well the cat is now really out of the bag now !! Icom announced 2 new RECEIVERS at the Tokyo 2016 JARL Ham Fair.

We can almost say for certain that the new IC-R8600 is a SDR based design.

[…]The new IC-R30 handheld probably is SDR too, but not sure yet. Pretty large bugger (no real good picture as of of me typing this). Will it be able to do at least P25 Phase one?

I’ll admit it: I was a little surprised to hear that Icom had announced new receivers. I’m happy to see that it’s an IC-R8500 replacement/update. I love the touch screen color display.

I also very much like the idea of a handheld wideband–possible SDR–receiver. I did a little extra digging and found the most concrete details about the new models on Icom UK’s website:

After an online teaser campaign featuring silhouettes of mystery radio models, the secret is out and Icom Inc. has shown the very first samples of the IC-7610, IC-R8600, IC-R30 and ID-51 PLUS2 to the public at the Tokyo Ham Fair 2016 (August 20-21, 2016). Details are relatively scarce but here are the basic details we have so far on these models.

The new IC-7610 (Photo: Icom UK)

IC-7610 HF/50MHz Transceiver (Base Station)
The IC-7610 is the successor to the IC-7600 and will be a dual-watch capable HF+50MHz 100W base station with built-in antenna tuner. The LCD will be touch screen and you will be able to connect an external display.

IC-R8600 Wideband Receiver (Base Station)
The IC-R8600 replaces the IC-R8500 wideband receiver and will feature the technology incorporated into Icom’s best selling IC-7300. The IC-R8600 will be able to receive a wide frequency range from 0.01-3000MHz frequency in analogue and various digital modes (D-STAR, P25, NXDN and dPMR). The IC-R8600 will feature a larger 4.3 inch touch screen display which will feature fast moving spectrum scope and waterfall display.

IC-R30 Communications Receiver (Handheld)
The IC-R30 is the successor to the popular IC-R20 compact handheld receiver. The IC-R30 can listen to two signals under certain conditions (analogue + analogue or analogue + digital). The IC-R30 will be able to decode D-STAR, P25, NXDN and dPMR digital (conventional) modes.

ID-51 PLUS2 Dual Band D-STAR Digital Transceiver (Handheld)
The ID-51 PLUS2 handportable is a special edition model which will come in several colours/patterns. The new ‘Terminal Mode’ and ‘Access Point Modes’ enable you to make D-STAR calls through the Internet, even from areas where no D-STAR repeater is accessible.

More details will be available nearer to each product’s launch. There are currently no details about pricing and availability.

Stay tuned to this website and our social media pages for further announcements.

I can’t wait to learn what the price point will be for the IC-R8600. I hope it’s at least in-line with the IC-7300 or (its predecessor) the IC-R8500. I also hope that, perhaps, the new IC-R30 will have full-mode HF capabilities.

We’ll post news about these new rigs as it becomes available–so will Dave Zantow. Stay tuned!

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Reminder: From The Radio Netherlands Archives Part 2

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(Source: PCJ Press Release)

August 21st and 22nd PCJ Radio International will present part 2 of From The Radio Netherlands Archives.

In the first program we played a mix bag of stuff. But in program two the focus will be on news and documentaries. You will hear Ginger Da Silva, Eric Beauchemin, Pete Myers and more.

There will be a special E-QSL issued for this program. PCJ Radio International’s partner stations will receive this program in two parts.

The program will be presented by Paulette MacQuarrie.

Europe: 0600 to 0800UTC – Frequency 7780kHz
August 21, 2016

North America: 0100 to 0300UTC – Frequency 7570kHz
August 22, 2016

For more information contact PCJ at [email protected]

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Mike reviews The Pol Pot Conspiracy

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Many thanks to SWLing Post contributor, Mike Barraclough, who writes:

Neil Ffrench Blake is a former BBC producer and journalist who launched and was Managing Director of Radio 210, first station Mike Read and Steve Wright worked at. He was also involved in psychological warfare radio stations broadcasting to Aden, Afghanistan and managed ones to the Falkland Islands and Cambodia.

The Kindle book The Pol Pot Conspiracy, a work of fiction, but solidly based on autobiographical fact, covers in one of its chapters his work on Radio Atlantico del Sur.

[Radio Atlantico del Sur was] run during the Falklands War using requisitioned BBC transmitters on Ascension and aimed at Argentinian conscripts. [T]he majority of the book [focuses on the] Voice of the Khmer (on the air from 1985 to 1992) and operated by members of the two non-communist factions who were in alliance with the Khmer Rouge and opposing the government set up following the Russian backed Vietnamese invasion of Cambodia in 1978.

Radio Atlantico del Sur met opposition in Whitehall particularly from the Foreign Office and from Douglas Muggeridge at the BBC World Service though behind the scenes he says the BBC could not have been more co-operative. This resulted in stories fed to the press about amateur broadcasters speaking the wrong kind of Spanish which Neil asserts are not true.

Voice of the Khmer received covert funding from the CIA, some of which was siphoned off by the corrupt Thai military. It was received worldwide on 6325 [kHz]. Transmitters were in Thailand or just over the Thai-Cambodian border in areas not controlled by the Vietnamese.
Details of the background to the book and link to it on Amazon below.

It’s long and perhaps overly detailed in parts but written in a very readable style.

Two links to a summary of the 20 May 1982 programme of Radio Atlantico del Sur and an interim assessment of its programming in the comments:

Thank you for sharing, Mike!

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Sticky radios? John shares yet another solution.

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Many thanks to SWLing Post contributor, John Figliozzi, who writes:

Sean at Universal Radio in Reynoldsburg, OH put me on to another terrific product that does the job fabulously and quite easily. It’s called MaxPro Ink/Adhesive Remover and is a citrus-based cleaner/solvent that won’t harm the radio’s plastic casing. You can get it on eBay for around $11 with free shipping:

Click here to view on eBay.

It took me a total of less than 3 hours to clean both my E1s. I used a lot of paper towels, working a section of the radio at a time, spraying the solvent onto the towels and then rubbing the surface free of the degraded and sticky rubberized coating. After removing the coating, I simply wiped down the radio with a wet paper towel to remove any residual solvent. They are now clean and smooth and look like new with all the white print intact. And my hands didn’t suffer any from contact with the solvent.

A reminder if you do this: It’s important to seek out citrus-based solvents and avoid petroleum based solvents. It was so easy with this product that I wished I had done this a long time ago and wasn’t so nervous about taking it on.

John Figliozzi
Halfmoon, NY

Thank you, John! I just noticed that a few of my rubber-coated receivers are starting to get tacky. I like the idea that this adhesive remover is gentle on the chassis. Click here to search eBay for MaxPro Ink/Adhesive Remover.

We’ve posted a number of solutions for sticky radios. Click here to view past posts.

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200m longwire update: rarely heard Radio Tawantinsuyo 6173.9 kHz, Peru, recorded in Oxford, UK

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Hi there, I thought I would share my first reception of Radio Tawantinsuyo, from Cusco, Peru, recorded during the inaugural test of my 200 metre longwire antenna. Of course this particular reception could be coincidence, but a very welcome catch in any case. Once again, the Sony ICF-2001D performs very well with this large antenna, but as on previous occasions, the rule is always to ‘choose your battles well’ targeting weak DX signals in uncrowded areas of the Tropical Band and elsewhere on shortwave. More details on the longwire antenna to follow in another post. Recorded at the ‘DX woods’ in Oxfordshire, UK on 31/07/16 at 00:27 hrs UTC. Thanks for watching.

Direct link to Oxford Shortwave Log reception video of Radio Tawantinsuyo

Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.

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