Category Archives: How To

How To Tune In Pirate Radio Broadcasts on Shortwave

This article originally appeared in the February 2014 issue of The Spectrum Monitor Magazine.


QSL from Radio Gallifrey Intergalactic

QSL from Radio Gallifrey Intergalactic

Even as many legacy international broadcasters are abandoning the shortwave bands, shortwave remains active and vibrant in another quadrant: namely, on shortwave pirate radio. Over the past few years, I’ve found that one of my favorite listening activities has become searching for unique pirate radio stations, and readers of my blog appear to have followed suit. Among the most popular queries made by readers is, “How can I find and hear pirate radio stations?” To help answer this question, I’m writing this primer.

Who are pirate radio stations?

Many are confused by the term “pirate radio,” otherwise known as “free radio.” Either term is sufficient, and some stations prefer one designation or the other. For consistency’s sake, I will use the term “pirate radio” in this article.

So what is pirate radio? Andrew Yoder, author and publisher of the 2012 Pirate Radio Annual, defines pirate radio as:

“[A]ny unlicensed hobby broadcast operation that is using more power than the legal limit.”

As Yoder goes on to explain in his introduction of the 2012 Pirate Radio Annual, pirates are often confused with radio bootleggers (who conduct unlicensed two-way conversations), clandestine stations (usually political stations), and jammers (who intentionally try to block broadcasts).

While debunking myths about pirates, I can say that in my years of pirate radio listening I’ve never heard a pirate intentionally jam a legal broadcaster.  Pirates tend to occupy swatches of the shortwave spectrum that are relatively quiet, avoid intentionally broadcasting on top of one another, and typically operate at fairly low power. I believe this is why authorities like the Federal Communications Commission (FCC) place shortwave pirates comparatively lower on their enforcement priority list.

And while pirate radio stations can be found across the radio spectrum, especially on AM and FM in urban areas, in this primer I’ll be focusing on those that inhabit the shortwaves.

What do pirates broadcast?

Pirates broadcast a wide variety of content, but are usually motivated by sharing their message–or favorite music–on the air.  Some pirates simply key down their mike and begin talking, sharing their political or social views; others offer near-professional music productions, complete with listener feedback, and often acknowledge listener reports with QSLs (radio postcards).

I received this QSL from the amazing Radio Ronin Shortwave shortly before he received "the knock" from the FCC and stopped transmitting.

I received this QSL from the amazing Radio Ronin Shortwave shortly before he received “the knock” from the FCC and stopped transmitting. (Listen to one of Ronin’s broadcasts below.)

RadioRoninShortwave-QSL-Back As a self-proclaimed “content DXer,” what interests me in pirate radio is that the listener never knows what to expect, but you can guarantee that the content will be different from that of the major broadcasters.

To prove my point, here are some MP3 recordings of some of my favorite recent pirate radio stations/broadcasts:


Radio Casablanca


Boards of Canada HF


Wolverine Radio


Hard Tack Radio


Radio Strange Outpost 7


Radio Ronin Shortwave

Where do pirates broadcast?

QSL247Though pirates can be located anywhere on the planet, and therefore can broadcast, hypothetically, anywhere on the radio dial, patterns are actually fairly predictable in order to draw a listening audience. Pirate stations want listeners to discover them, so they broadcast in various “watering holes.”

With that said (and for reasons I don’t fully understand) depending on where you live in the world, you will either find it very easy to locate pirates…or extremely difficult. If you live in North America–particularly on the east coast–or in Europe, you’re in luck: these are the hottest geographic locations for shortwave pirate radio activity. If you live in other parts of the world, pirate hunting can pose serious DX challenges.

Again, I turned to Andrew Yoder for insight about pirate radio activity in the rest of the world; his reply:

“I’m always amazed at how few areas in the world have pirates that are connected to any scene. Back when KIWI was on the air regularly in the ’90s, I assumed that pirate radio would explode in Oceania and Asia. Not just Aussie and NZ pirates, but stations in places like The Phillipines…maybe Japan, South Korea, or Thailand. Nothing. Radio G’Day came on from Australia occasionally, but no one else. And when KIWI went silent, that was it. South America was strong for a while in the ’90s, but that has also fallen silent. I know that lots of pirates operate there, mostly on AM and FM, but no one is on SW…and if they are, they aren’t sending QSLs, [or] operating in places where radio hobbyists would hear them…”

Yoder actually addresses this apparent restriction, to some degree, in the 2013 Pirate Radio Annual, which has only just been released.

Hunting equipment

Before we talk about where to hunt pirates, however, we need to talk about the necessary equipment–i.e., your radio and antenna.

Unlike trying to locate China Radio International, Radio Australia, or the BBC World Service, hunting pirates requires a decent-quality radio and antenna.  Keep in mind that pirates are relatively low-power broadcasters. While the magic of shortwave radio can transport a small signal vast distances, to hear pirates regularly and clearly, some precision is required.

Listening to Channel Z in a parking lot.

Listening to Channel Z in a parking lot.

If you live in a geographic hotbed of pirate activity (again, eastern/central North America and Europe) you might find a portable radio ample for hearing a number of pirates. Indeed, this past November, I listened to the pirate Channel Z while sitting in my truck; I was only using a Tecsun PL-660 with the antenna extended out of my opened driver’s-side window.

Though Channel Z was broadcasting in AM, as many do, it’s best to hunt pirates with an SSB-capable portable. Why? Unlike major broadcasters, many pirates don’t stick to AM as a preferred mode. Indeed, since pirates are operating at lower power, they get much more bang-for-the-watt out of SSB. To track pirates, you’ll need a radio with both AM and SSB modes.  It will also help to have some sort of adjustable bandwidth filter (wide/narrow). I’ve hunted pirates with a range of such radios, among them the Sony ICF-SW7600GR, the Grundig G3, the Grundig G5, the Tecsun PL-600 and PL-660, and even the new Tecsun PL-880.

It’s much better, of course, if you have a table-top receiver, software-defined radio, or ham radio transceiver with a general coverage receiver hooked up to a resonant outdoor antenna–especially if you live outside Europe and North America. I’ve had great results in the past with an old Icom IC-735 and a 40-meter dipole antenna. The important thing here is that you invest in a receiver with a respectable degree of sensitivity and selectivity. You might need that sensitivity and an outdoor antenna to pull these relatively low-powered signals from the ether.

RadioCasablancaQSL

How to hunt pirates

Back in the 1980s, before the Internet and its online bulletin boards, I thought finding pirates was truly a hunt–random and altogether unpredictable.  Now I know that finding pirates is reasonably achievable; at least, it is possible to know roughly where, and generally when, to find them. Fortunately for the beginning pirate-hunter, there are now online message boards, free radio logs, and even publications (like Yoder’s excellent treatise on the subject) to help guide your tuning (see resource links below).

JFK Shortwave QSL-Pirate radio operators usually have day jobs–like most of us–thus only transmit while home from work.  While you can hear some on weekdays, your best bet is Friday, Saturday and Sunday nights, local time. So, for example, if you’re listening for North American pirates from Europe, you’ll need to plan accordingly. Pirates are always active during holidays, too,  most especially on Halloween (31st of October), which seems to be pirates’ favorite holiday.

I’ve noticed increased pirate radio activity during the winter months, as well. This is likely due to the early sunsets and cold winter nights of the northern hemisphere that tend to keep people indoors, which in turn encourages pirates to hit the air.  Moreover, summer conditions in the North American “43 meter” band  are often much noisier, thus pirates know they’ll be fighting static crashes to be heard during the summer months. In the quieter winter months, stations seem to pop out of the ether.

North American Pirates

The bulk of the pirate radio broadcasters I log transmit just below the 40-meter amateur radio band: anywhere from 6,850 kHz to 6,970 kHz and typically on a frequency spaced at 5 kHz. The most popular frequency is arguably 6,925 kHz, but I often log pirates on 6,935 and 6,950 kHz.

Radio_Borderhunter_qsl_thomas_witherspoon-X

Borderhunter Radio is one of the strongest Euro Pirates I’ve ever heard. (Click to enlarge)

Euro pirates typically broadcast in the 48 meter band (6,200 – 6,450 kHz), but the HF Underground notes that you will also hear Euro pirates on the 75 meter band between 3,900-4,000 kHz, on the 19 meter band (15,000-15,100 kHz and 15,700-15,900 kHz), and even on the 13 meter band (21,000-25,000 kHz).  My most recent logging of a Euro pirate from North America was Radio Borderhunter on 15,500 kHz; his signal was quite amazing.

Outside of the pirate world? Fear not

If you live outside of North America and Europe, that doesn’t mean there aren’t pirate radio stations to be found. Ask your local radio club or search the Internet for local/regional pirate stations. Additionally, you can always tune a remote receiver, via the Internet on the Global Tuners website, or via the University of Twente’s SDR in the Netherlands.

We’ve now covered the who, what, where, when, and how of pirate hunting–but what about why?

Why chase pirates?

Whether you’re a QSL collector, a “content” DXer, or the casual SWLer, I find there’s something in pirate radio listening for everyone. Speaking for myself, I’m passionate about pirate radio listening because it combines my listening/technical skills, my appetite for highly unique content, and for building a collection of quirky QSL cards. Compared to big-gun broadcasters, pirates are much more elusive game as very few announce their broadcasts in advance, and there’s no telling where a pirate’s transmitter is located: it could be in their home, on a boat, or a portable one dropped in a remote location and later retrieved.

I decoded this Wolverine Radio SSTV QSL on the SSTV iOS App

I decoded this Wolverine Radio SSTV QSL on the SSTV iOS App

Chasing pirates has also increased my technical know-how. For example, though I’m a ham radio operator, I had never even attempted to decode the SSTV (slow-scan TV) mode until prompted to do so by Wolverine Radio: at the end (and sometimes in the middle) of their broadcasts, Wolverine is known to send electronic QSL cards via SSTV.

I’ve also been encouraged by pirates to hone my weak-signal DXing using exalted carrier reception (ECR)–zero-beating an AM signal in SSB–in an attempt to hear weak AM pirate stations. It’s a simple technique, and although it takes some practice, will work on most any radio with a stable BFO (beat frequency oscillator).

And did I mention the cool QSL cards?  Pirate cards are among the most unusual of QSL cards, that often incorporate obscure or vintage imagery–humor, horror, or other graphic oddity–or cast the pirate in a unique character representation.  They can be highly entertaining or thought-provoking, and thus are, themselves, a unique art form.

Don’t believe me?  Do a little pirate radio hunting yourself.  Like me, you might just get hooked!

My favorite pirate radio resources:

The Pirate Radio Annual:

This little book by Andrew Yoder is the equivalent of the WRTH (World Radio TV Handbook) of the pirate radio world. I keep a copy handy as it helps me identify stations and better understand their format. Additionally, you’ll find contact information for QSL requests and mail-drop addresses as well.  Each issue also contains a CD of sound clips from various pirates, several articles about the state of pirate radio, and other relevant info.

The HF Underground: http://www.hfunderground.com

An excellent and active pirate radio forum hosted by Chris Smolinski. Loggings are in real time and there are very few–if any–off-topic posts.

Pirates Week: http://shortwavepirate.info

Ragnar Daneskjold hosts an occasional podcast serving the shortwave pirate community; it includes pirate radio news, off-air recordings, and more.

Hobby Broadcasting Blog: http://hobbybroadcasting.blogspot.com/

Pirate radio guru Andrew Yoder started his own pirate blog last year, and has already began populating it with regular updates, QSLs, and recordings.

Free Radio Weekly:

The FRW is an email-only newsletter devoted to the hobby of pirate radio listening, and is distributed free to those who contribute. You can sign up for the newsletter by emailing any of their edittors: John Brewer ([email protected]), Ragnar Danskjold ([email protected]), Harold Frodge ([email protected]), Dave Turnick ([email protected]) or Larry Will ([email protected])

The SWLing Post

OK, I suppose I must also mention my own humble blog, where I continue to amass numerous pirate radio loggings and off-air recordings.  Just browse the pirate radio category: https://swling.com/blog/category/pirate-radio/

Note: Even though it is illegal to broadcast on the shortwave bands without a license, and those who do so are subject to hefty fines, it is not illegal to listen or to send and receive QSL cards from such operators.

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Video: Build a radio in less than one minute

DIY-Radio(Source: Southgate ARC)

“Due to the numerous requests from his Build-a-radio-in-5-minutes, radio amateur Tommy Helgevold OZ4KID decided to make a better video with explanations on how to make a radio like this

He also decided to beat his old challenge as well…

…so without further ado, I present to you – How to build a radio in less than 1 minute, can you build it?

There’s even a schematic in the end of the video + an animated version of the entire breadboard setup.

Thanks for watching, & enjoy.

Watch Build a radio in less than 1 minute”


Click here to view on YouTube.

While less detailed, you can also view OZ4KID’s DIY Radio in less than 5 minutes by clicking here or viewing via the embedded video below:

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Running SoniqWare SG-1 on a Windows PC

sg1-gui-fordocRecently, I posted a video showing how @LondonShortwave uses the GarageBand plugin, SoniqWare SG-1, for noise reduction. Since GarageBand is an Apple application, I didn’t believe SoniqWare SG-1 would work on a Windows PC, but SWLing Post reader Jeff Benedict (KB7AIL) writes:

“I run Mac OSX and GarageBand so it’s not really a concern of mine but, according to the documentation, SG-1 is compatible with Windows sound processing applications.
Here’s the documentation from SoniqWare:

From:  http://www.soniqware.com/pdf/SoniqWare-SG-1.pdf
p. 17

System Requirements
• Microsoft Windows XP/Vista,
• Mac OS X 10.5/10.6,
• 512 MB RAM,
• VST, VST3, or AU compatible host software

An explanation of the VST and a list of applications for Windows which are compatable with VST plug-ins:

http://en.wikipedia.org/wiki/Virtual_Studio_Technology

Of course, this comes with the caveat that I do not run any version of Windows or any of these sound processing applications so YMMV.

A short explanation of the different formats for sound processing plug-ins:

http://support.pluginboutique.com/knowledgebase/articles/51119-interface-types-explained-vst-rtas-au-etc-

Many thanks, Jeff, for the tip!

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Shortwave noise reduction via GarageBand plugin

sg1-gui-fordocMany thanks to @LondonShortwave, on Twitter, who made a video showing how to use a GarageBand plugin to filter noise out of shortwave audio in real time. He describes this on his YouTube channel:

“I recently discovered a Mac AudioUnit plugin called Soniqware SG-1 that allows real-time noise filtering based on a brief noise sample (sometimes referred to as the “noise profile” or the “noise fingerprint”). This video shows it being applied to shortwave radio signals, which I believe is a first, as I have been unable to find anyone else who has already done it. In a number of cases, it turns laborious DXing into armchair listening.

The antenna used in these experiments is a Wellbrook ALA1530SP-1 and is positioned indoors. More information is contained in the first few seconds of the video.”

Click here to watch the video on YouTube.

Note that GarageBand is an application only available on the Mac OS X platform. Fortunately, it comes free with every new Apple computer purchase. You can find the Soniqware SG-1 spectral noise gate plugin by clicking here.

Be sure to follow @LondonShortwave on Twitter: http://twitter.com/LondonShortwave

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Forcing the Tecsun PL-880 to use an external antenna on MW/LW

For those of you who aren’t satisfied with the PL-880’s internal ferrite antenna for mediumwave and longwave reception, here is a video explaining a work-around that will force the PL-880 to use an external antenna on those bands:

Many thanks to YouTube user pesnyaozemle for posting this video and to SWLing Post reader Jon for sharing.

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Christos’ Tecsun PL-390: problems switching between MW/LW

TecsunPL-390Christos’ trusty Tecsun PL-390 started having a problem recently. He writes:

“My PL-390 can no longer shift from MW [mediumwave] to LW [longwave]. I left it without batteries for some hours in order to achieve a sort of reset, but nothing happened. If I press the MW/LW button longer than usual, then it start presetting stations.”

I suspect this could simply be a problem with the contact underneath the LW/MW button. Has anyone else experienced this problem or found a way to fix it? Please comment!

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Repairing the Tecsun PL-600 after electrostatic discharge (ESD)

SWLing Post reader, Michael Taniwha (NZ1MT), has kindly documented how he repaired his Tecsun PL-600 after it went silent on the shortwave bands. If this has happens to you, don’t toss your PL-600, use Mike’s excellent guide below for an inexpensive repair.
(Click on images to enlarge)


TECSUN PL-600 – Electrostatic Discharge Repair
Tecsun-PL600

My TECSUN PL-600 had been a trusty bedside radio companion for the last two years. The radio is also my alarm clock and I use the timers to wake me up each morning to my local AM station WHYN or Radio Australia on SW.

On November 29, 2013 I turned the TECSUN PL-600 on and attempted to tune into some SW stations and was surprised to find the radio stone deaf on all the SW bands….similar to the Steely Dan song FM (No Static At All) except in this case it was SW (No Static At All). Immediately my first thought was that the radio had probably suffered an Electrostatic Discharge (ESD) when I had touched the external antenna while moving it around earlier in the day. I reset the radio and tested all the bands, AM and FM bands seemed to be working OK, yet SW remained dead.

My next step was to open up the radio and look for the obvious.

IMGP0092

Upon opening the radio I was surprised to see two back-to-back IN4148 diodes (D17 & D18) fitted across the external antenna input to ground and that the diode D17 was cracked in half. The back-to-back diodes offer a very high resistance at the micro-volt RF level, but will conduct once the forward voltage (Vf) raises above 1.0V. So for the cost of a few pennies we have a relatively cheap and dirty ESD protection circuit.

IMGP0095

My first thought on the cause of the cracked diode was a manufacturing defect when the diode was soldered in at the factory (in fact I later discovered it was likely broken during assembly of the rear cover at the factory – read on). My next thought was just my luck that the broken diode was probably in the polarity direction that I needed the ESD protection.

The next step was to locate a schematic diagram and start circuit tracing to find the likely blown front-end RF pre-amplifier FET/MOSFET that had been damaged. As luck would have it a schematic of sorts is posted in the TECSUN PL-660/PL-600 Yahoo Groups. See the following Link.
http://groups.yahoo.com/neo/groups/TecsunPL660TecsunPL600/files/PL%20600%20Schematics/

The only issue is the text is mostly in Chinese! However, the parts on the radio PC board are clearly labeled as are the parts on the schematic.

IMGP0109 schem

What I quickly notice is that the schematic shows no ESD protection on the front end (upper highlighted circle), but in fact the radio has additional parts D17and D18 (the back-to-back diodes), and C57 on the PC board coming from the external antenna jack. Whenever the external antenna jack is used the jack disconnects the radios telescopic antenna which is connected to C68 to the antenna jack switch circuit. After this antenna switch the schematic from C126 onwards is correct. Following the schematic we see that both the telescopic antenna and the external antenna go through the DX/NORM/LOCAL antenna switch to the IQ3 (AGC?) transistor and then to the RF pre-amp 2Q1 FET (lower highlighted circle). My educated guess was that the 2Q1 FET type 2SK2394 was damaged by the ESD. Yes the 2Q1 it is a very small SMD type FET.

IMGP0097

My reasoning for the 2Q1 having failed is that FM reception was not affected as the antenna circuit goes directly to the TA75358AP FM decoder chip IC1.

SchematicPL-600

Similarly, AM reception was not affected as the AM signal is primarily from the ferret bar AM ANT coil that uses the 1Q1 FET for RF pre-amplification.

PL-600 Scem2

At this stage I contacted Kaito Electronics Inc. the official US based distributor of TECSUN radios and inquired if they provide component level repairs or provide replacement SMD components. The answer was no to both questions.

I then started hunting around online to locate a replacement 2SK2394 FET which is a Sanyo manufactured FET and finally found one for sale on eBay from hkutsource (Hong Kong UT Source) for $2 + $4 shipping. See following eBay link.

http://www.ebay.com/itm/2SK2394-7-Manu-SANYO-Encapsulation-SOT-23-High-Speed-High-Current-Switching-/130835554230?ssPageName=ADME:L:OU:US:1120

This FET is listed as a 2SK2394-7 but all the specifications line up against the specifications for a 2SK2394. I ordered it on December 6th and it arrived 10 days later enclosed in an ESD bag and packaged in a sturdy little box.

IMGP0116

IMGP0117

IMGP0118

Now the fun starts. To replace the 2Q1 SMD FET I used my needle nosed 40W soldering iron, vacuum pump solder remover and wore my ESD strap to stay grounded. First step was to remove the existing 2Q1 FET.

IMGP0119

Next step was to install the replacement 2Q1, if you haven’t worked with SMD devices before let’s just say it is like working with a live insect, they are small and seem to move around on their own accord.

After much tooth pick (my hi-tech SMD tool) maneuvering I finally had it installed. OK I admit it is a little skewed. Have you noticed I have also installed a replacement D17 diode at the top right of the picture?

IMGP0122

The moment of truth! At this stage I did a quick radio check and fired up the PL-600 on the SW band and tuned into CHU, the Canadian Time Station on 3330 kHz, and picked up a time pip signal. In addition I was tuning into other SW stations and had plenty of static as well.

I now decided to install additional ESD protection on the telescopic antenna input as well using two IN4148 back-to-back diodes. After a quick hunt around in my junk box I located an old PC board with a few IN4148 diodes attached. Quickly removed and tested them using my multimeter diode checker.

IMGP0112

IMGP0111

I then installed the additional ESD diodes as shown below (the ATN label on the PC board is where the antenna wire from the telescopic antenna on the back over is attached).

IMGP0124

Finally it was time to reassemble the radio. This is when I started having real problems as the rear cover just would not reattach. When I looked closely I could see that the plastic support screw hole on the rear cover for the telescopic antenna sits partially against the PC board where the D17 diode is located. Now that explains why that diode was cracked when I first opened up the radio at the beginning of this repair. It appears the two ESD diodes were probably a design afterthought and the rear case wasn’t adjusted to accommodate their location on the PC board.

IMGP0125

To get around this issue I removed the replacement D17 and relocated it to the lower part of the PC board below C57. Once I had moved D17 I could now reassemble the radio and again tested the radio. My TECSUN PL-600 is now back to its trusty role beside my bed and picking up SW stations.

Mike-Tecsun-PL-600-Repaired

In summary if you have a TECSUN PL-600 or PL-660 that is deaf on the SW band it is likely to be an ESD damaged 2Q1 RF pre-amplifier 2SK2394 FET. For $6 and some time and effort you can replace the FET and have your radio back up and running like new.

Michael Taniwha – NZ1MT
Email: To send Michael an email, simply insert his callsign @YMAIL.COM
December 17, 2013


Many thanks, Mike, for the excellent documentation and detailed photos! 

Note that you can also download Mike’s guide as a PDF on the Tecsun PL-660/600 Yahoo Group (membership required).

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