Monthly Archives: October 2015

Robert’s modified version of the Sony SRF-39FP

srf-39fp

Many thanks to Robert who comments on our post about the Sony SRF-39FP:

Here’s a Suped-up Version of the SRF-39FP made for me by Gary DeBock. [see above]

As if the Prison Radio wasn’t already good enough…this 7 Inch loopstick gives it even more bang four the Buck!!

I call this Prison Radio the “Frankensteiner Prisoner” thus the 39FP monicker.

Robert, that’s a great SRF-39FP modification indeed and I bet it improves reception (and nulling abilities) quite dramatically. Plus, it was built by Gary DeBock–no doubt, a quality mod! Thanks for sharing!

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Pocket DX: Finding the Sony SRF-59 and SRF-39FP

Sony-SRF-59-and-Sony-SRF-39FP

I have two of the Sony SRF series pocket AM/FM radios: the grey SRF-59 and the clear SRF-39FP.

The venerable SRF-59 has long been one of the least expensive, quality analog AM/FM receivers on the market. I originally purchased one new for $14.95 US including shipping. Here’s a short review I made of the ’59 several years ago.

Sony_SRF-39FP-front

The Sony SRF-39FP (click to enlarge)

The SRF-39FP–the model with the clear case–was specifically designed by Sony radio for the prison market.

A couple years ago, someone on eBay had a lot of Sony SRF-39FP units on sale–I jumped at the opportunity to buy one new-in-box for $20 US. The entire lot of SRF-39FPs sold in a matter of hours. Indeed, the ’39FPs were so popular, by the time I prepared a post for the SWLing Post, the seller had already sold out. (I’m kicking myself for not buying at least one extra–!)

While most ultralight radio enthusiasts would give the SRF-39FP a performance edge over the SRF-59, they’re essentially the same radio–especially if you tweak the SRF-59 like my buddy Dave Richards did.

Click to enlarge

The Sony SRF-59 (click to enlarge)

Several weeks ago, while Steve researched the reason he was hearing shortwave broadcasters on his SRF-59, he also discovered that the SRF-59 had been discontinued and selling in many places for three or four times the original price.

He found one vendor still selling the SRF-59 for $14.99 plus shipping. I placed an order with this vendor over a month ago, but still haven’t received the product because the vendor hasn’t taken delivery of the final batch of units from Sony. I’m in contact with this vendor and when/if the units are received in stock next week, I’ll post an update here on the SWLing Post (if interested, follow this tag).

If you’re in the market for a Sony SRF-59, here are a few places you may find one new or used:

(If you know of other good suppliers, please comment!)

Sony_SRF-39FP-back

The SRF-39FP has a clear housing which is meant to prevent prison inmates from using it to smuggle contraband.

If you would prefer the Sony SRF-39FP, the only source I know of is eBay. When one becomes available, it typically sells for $45-50 US.

Click here to search eBay.

To be clear: while the SRF-59 is an exceptional ultralight receiver, $45-50 US would certainly place it in a price class with other excellent ultralights.

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Mini DXpedition: Oxford Shortwave Log and the Sony ICF-SW55

Sony-ICF-SW55

SWLing Post reader, “Oxford Shortwave Log” recently noted the following on our Facebook page:

“Hi there, I received some very nice feedback regarding almost perfect reception of Radio Australia during a mini DX-pedition into the Oxfordshire countryside and thought I would share it.”

“I use a (now vintage I guess!) Sony ICF-SW55 and a 25 metre long-wire. There are lots more videos at on YouTube channel: Oxford Shortwave Log

Great proof that Mini DXpeditions can pay off!

Sounds like that Sony ICF-SW55 performs admirably–it is certainly a classic portable.

I remember when the ICF-SW55 was introduced in 1993-1994; back when I was doing my undergraduate studies and had no funds for it. In the 1990s, Sony’s portables almost seemed to be sent to us from the future–large informative displays, advanced memories, and incredible portable performance were the hallmarks.

On eBay, you’ll find that the ICF-SW55 still fetches a high price.

OSL: thanks for sharing the videos!

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Russia’s attempt to test Runet by shutting down Internet

"Russian Federation (orthographic projection) - Crimea disputed" by FutureTrillionaire - Own work. Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Russian_Federation_(orthographic_projection)_-_Crimea_disputed.svg#mediaviewer/File:Russian_Federation_(orthographic_projection)_-_Crimea_disputed.svg

Many thanks to SWLing Post contributor, Robert (AK3Q), who shares this news item:

“This was first reported by the Telegraph and picked up by Fox News website:”

(Source: The Telegraph)

Russia has run large scale experiments to test the feasibility of cutting the country off the World Wide Web, a senior industry executive has claimed.

The tests, which come amid mounting concern about a Kremlin campaign to clamp down on internet freedoms, have been described by experts as preparations for an information blackout in the event of a domestic political crisis.

Andrei Semerikov, general director of a Russian service provider called Er Telecom, said Russia’s ministry of communications and Roskomnadzor, the national internet regulator, ordered communications hubs run by the main Russian internet providers to block traffic to foreign communications channels by using a traffic control system called DPI.

The objective was to see whether the Runet – the informal name for the Russian internet – could continue to function in isolation from the global internet.

The experiment, which took place in spring this year, failed because thousands of smaller service providers, which Roskomnadzor has little control over, continued to pass information out of the country, Mr Semerikov said.

Continue reading at The Telegraph…

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Excellent current conditions, evidenced by today’s 31 meter logs

31meterband-waterfall

This morning, before heading out the door, I tuned around the 31 meter broadcast band. I’ve actually been recording 640 kHz of the 31 meter band for almost 24 hours, trying to capitalize on the fact that propagation conditions have been the best I’ve seen in several months. At some point in the future, I’ll load this recording, tune through it and remind myself what’s possible when propagation is favorable! Check out the waterfall screenshot above.

Asian stations had a strong showing on the band in eastern North America this morning.

Here are the stations I logged starting around 12:30 UTC today:

  • 9395 WRMI English
  • 9410 China National Radio 5 Chinese
  • 9420 China National Radio 13 Uyghur
  • 9430 FEBC Radio Chinese
  • 9440 China Radio International Cambodian
  • 9460 China Radio International English
  • 9470 UNID (weak)
  • 9490 Voice of America Korean
  • 9500 China National Radio 1 Chinese
  • 9515 China National Radio 2 Chinese
  • 9540 China Radio International Chinese
  • 9550 Radio Havana Cuba Spanish
  • 9570 China Radio International Cantonese
  • 9575 All India Radio Tibetan
  • 9580 Radio Australia English
  • 9600 China Radio International English
  • 9620 All India Radio Sindhi
  • 9635 Voice of Vietnam 1 Vietnamese
  • 9640 Radio Havana Cuba Spanish
  • 9645 China Radio International English
  • 9650 Radio Sonder Grense Afrikaans (with QRM)
  • 9660 Radio Taiwan International Chinese
  • 9665 KCBS Pyongyang Korean (weak)
  • 9680 Radio Taiwan International Chinese
  • 9700 Radio New Zealand International English
  • 9710 China National Radio 1 Chinese
  • 9720 Reach Beyond Australia (HCJB) Indonesian
  • 9730 China Radio International English
  • 9735 Radio Taiwan International Indonesian
  • 9740 BBC English
  • 9750 NHK World Radio Japan (?) Japanese
  • 9760 China Radio International English
  • 9785 China Radio International Laotian (?)
  • 9805 Radio Marti Spanish (w/accompanying Cuban jammer)
  • 9820 Radio Habana Cuba Spanish
  • 9830 China National Radio 1 Chinese (with RTTY QRM)
  • 9835 RTM Sarawak FM Malaysian (very weak)
  • 9840 Voice of Vietnam English
  • 9845 China National Radio 1 Chinese (weak)
  • 9855 China Radio International Chinese
  • 9870 AIR New Delhi Hindi
  • 9880 KSDA-AWR Guam Korean
  • 9920 FEBC Radio Hre
  • 9955 WRMI English
  • 9980 WWCR English
  • 10000  WWV Ft. Collins

That’s 46 signals in a space of 640 kHz–not bad!

I dare say: these excellent band conditions will not last forever.

Make time to play radio today!

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Virtual Radio Challenge IV: Emergency radio and a chance to win a prepper radio package

GP5SSB-Front

The CountyComm GP5/SSB portable SW/AM/FM radio is just one of many items in this prize package!

UPDATE: This challenge is now closed.  Click here to read about the winning entries.

The SWLing Post attracts readers and enthusiasts from all walks of life. In the past, we’ve put together Reader Challenges based on actual questions we receive from readers, usually looking for the best radio kit for a unique situation or location. Our first challenge sought gear for the most remotely inhabited island on the planet; the second, for a village in the Himalayas; and the third, for an Appalachian Trail thru-hiker.

This time we’re taking a slightly different angle, but nonetheless representative of a quite significant (and growing!) number of reader queries: What is the best radio for use in an emergency? Or, as we’re often asked,”What is the best prepper radio?”

There are many ways to answer this question based upon the scenario a reader is confronting. To help define a scenario for this challenge–perhaps the first in a few similar radio challenges–I enlisted the help of my good friend, David Cripe (NM0S). Dave, an engineer and radio/kit designer, is something of a modern day MacGyver and preparedness expert. Not to mention, a very cool guy.

Dave agreed not only to help author an emergency scenario (below), but has also agreed to judge the reader challenge responses.  Dave will select his favorite from among the best  entries.

But there’s more: CountyComm Government Products Group has generously offered a comprehensive prize package for the winning entry!

Interested? Keep reading…

The scenario

ivan-hurricaneAs is often said, stuff happens. Indeed, our modern communication infrastructure is a fragile thing. Let’s imagine that your area suddenly loses power–as well as cell phone and internet service–for an indeterminate period. Home and personal electronics remain unaffected, but must be powered off-grid (without mains power).  Moreover, you may be required to evacuate your home…perhaps even on foot.

Electricity-Pylon-TowerDoes the above scenario seem far-fetched?  Actually, this is just the sort of scenario we often see occur in regions throughout the world as the result of natural disasters (and occasionally human sabotage), and it’s the scenario we’ll mentally prepare for in this exercise.

In preparation for this event, what portable radio kit would you assemble?  In particular, you’ll want to look for an optimal combination of features and portability for price, ($400 US for all your kit). And it isn’t just the radio we’re interested in, but also how you intend to use it.

Therefore, how do you intend to:

  1. obtain information about local and world events?
  2. communicate within your local region to assist emergency services?
  3. pass messages to friends and family over long distances?
  4. power your kit for an indeterminate amount of time?

Limitations

Rather than making this virtual challenge restrictive, the following limitations are designed to make the challenge more fun and create a level playing field for all participants.

  1. Once again, you’re limited to a (virtual) budget of $400 US to procure your supplies; ideally, this will include the shipping costs of all purchase(s) you make.
  2. You may select new, used, or homebrew gear, but you must base your choices on reality (i.e., actually find item(s) online and document the price and time of availability). If you “shop” eBay, for example, make sure you’re using the final purchase price, not the current or opening bid. If you do locate something used on eBayQTH.comQRZ.com, or at Universal Radio, for example, do include the link to the item (just to add to the fun). If you enter a homebrew radio, it should be based on something you’ve either built or used, and must include a photo. Of course, you can use multiple radios, but keep in mind the amount of space and weight these will consume in your evacuation or “bug-out” bag.

The prize package

Click to enlarge

Click to enlarge

CountyComm is generously offering the selected entrant of this contest a prize package that includes the following items, useful whether there’s an emergency or not:

The total value of this kit is $209.94 US!

How to enter the challenge

This challenge will continue for one month, ending on November 21.

To enter, simply describe the kit you’ve chosen and how you would address the scenario above. Please be specific, but also as concise as you can. If you’re describing a radio or gear you already own, consider sending photos, as well.

Simply send your entry to [email protected].

Spread the word!

If you’re active in a preparedness group locally or online, please help us spread the word in your group!  Although there is a serious element to this exercise, in that it might really help you or another reader in an emergency situation, it’s intended to be fun; enjoy the challenge, and good luck!

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The bands are open! Make time to listen.

Sony-ICF-SW100-Outside-Fall

Though I’ve spent the entire day sawing and splitting firewood, I’ve been actively recording spectrum on the 31, 25, 19 and 16 meter bands with the WinRadio Excalibur, Elad FDM-S2 and the SDRplay RSP. Why? Propagation–especially on the higher bands–has been the best it’s been in several weeks.

As I discovered at the recent SWLing Post DXpedition, my shack PC can handle making multiple spectrum recordings simultaneously as long as I limit each recording to the width of a broadcast band. (I’ve never tried pushing the limit very hard.) Someday in the future–perhaps when we’re having terrible propagation–I’ll play those spectrum recordings back and tune through them as if they were live.

Radio time travel at its best.

Sony-ICF-SW100-Outside-2

When I decided to throw in the towel with all of the firewood processing, I fired up the Sony ICF-SW100 (above) and tuned in a game on 17,855 kHz: Radio Exterior de España.

The REE signal was simply booming into eastern North America!

Hard to break away from the radio on days like this.

My advice? Take advantage of these conditions and make time to listen!

For me, SWLing a great excuse to relax and let me back heal after a long day of splitting wood. For some, perhaps it’s a good excuse to take the radio outdoors and away from urban interference. Whatever the excuse, don’t hesitate to fire up your radio!

There are some interesting stations on the bands this evening. Feel free to comment with some you’ve logged.

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