Category Archives: Numbers Stations

Bletchley Park replica Turing Bombe decodes 40M Enigma message

Remember the weekend 40 meter Enigma message transmitted by DL0HNF? At least one recipient decoded this message:

40m Enigma Message decrypted at Bletchley Park

On Friday, April 7 the amateur radio station DLØHNF transmitted an Enigma encrypted message on 7036 kHz to Bletchley Park

DLØHNF is the club station at the Heinz Nixdorf Museum in Paderborn, Germany. The encrypted telegraphy message they transmitted was received at the home of the World War Two UK Codebreakers in Bletchley Park. There the message was fed into a replica of the Turing Bombe which enabled the encryption to be cracked.

The message read: “Paderborn greets the Codebreakers at Bletchley Park”

Read the report and pictures of the event down the page at
http://www.hnf.de/en/veranstaltungen/events/cipher-event-wer-knackt-den-enigma-code.html

Bletchley Park
https://www.bletchleypark.org.uk/

I would have loved to watch the Touring Bombe in action!

Out of curiosity, did anyone record the Enigma transmission? I’ve had a number of readers inquire about this. Please comment!

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Was Morse Code the smoking gun for this spy with no name?

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Many thanks to SWLing Post contributor, Dan Robinson, who shares this story from the BBC News via Matthew M. Aid‘s blog:

[…]It was a cold Saturday morning in April 1988 when a van full of detectives arrived outside the North London home of Erwin van Haarlem. The self-employed art dealer, 44, lived alone in sleepy Friern Barnet, a smattering of brick homes beside the grim North Circular ring road.
The Dutchman’s apartment building on Silver Birch Close had become the centre of an investigation led by the British intelligence agency MI5. It suspected that Van Haarlem – whom neighbours described as an “oddball” – was not in the art business at all, but a sinister foreign agent.

Inside, Van Haarlem was hunched over a radio in his kitchen. He was still wearing his pyjamas, but his hair was parted neatly to one side. He was tuned in, as he was every morning, to a mysterious “number station”. In his earpiece, a female voice recited numbers in Czech, followed by the blip-bleep of Morse code.

At 09:15 detectives from Special Branch, the anti-terror unit of London’s Metropolitan Police, crashed into his apartment. Van Haarlem tried to lower his radio’s antenna. It jammed. When he pulled open a drawer and grabbed a kitchen knife, an officer tackled him, and yelled: “Enough! It is over! It is over!”

Hidden among his easels and paintings, detectives discovered tiny codebooks concealed in a bar of soap, strange chemicals, and car magazines later found to contain messages written in invisible ink. Investigators suspected Van Haarlem was not really from the Netherlands, but was a spy for the UK’s Cold War adversary, the Soviet Union.

[…]Mrs Saint, 61, who co-ordinated the local Neighbourhood Watch Scheme, said she telephoned the police in November 1987 to report strange noises and a “Morse code” interference which affected her television reception every night at 21:20.[…]

Click here to read this fascinating in0depth story on the BBC Magazine website.

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Numbers Stations and the two Koreas

North Korean numbers station in the press

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I’ve been offline and off-grid this week and have accumulated quite the backlog of email.

One news item that caught the attention of a large number of readers (thanks to all for the tips–!) was North Korean spy numbers. I’m very curious if any readers have logged and recorded this station–if so, please comment and consider sharing your recording!

The news was featured on at least two prominent news sites:

(Source: The Guardian)

North Korea’s radio broadcast of string of mysterious numbers is possible code

Numbers read on state radio may be cold war-era method of sending coded messages to spies in South Korea – or an attempt to wage psychological warfare

North Korea’s state radio has recently broadcast strings of indecipherable numbers, according to officials in Seoul, in a possible resumption of a cold war-era method of sending coded messages to spies operating in South Korea.

A female announcer at the radio station read numbers for two minutes on 24 June and 14 minutes on Friday, according to Seoul’s unification ministry and national intelligence service (NIS). A copy of those comments provided by the ministry included phrases such as “No 35 on Page 459” and “No 55 on Page 913”.[…]

(Source: BBC)

North Korea is criticised by South Korea for ‘spy broadcasts’

South Korean officials have criticised North Korea after it apparently resurrected a Cold War-era method of contacting spies.

In recent weeks, mysterious strings of numbers have twice been broadcast over the radio from the North.

A spokesman for the South’s Unification Ministry said it couldn’t be sure about North Korea’s “hidden intentions”.

But it urged the North to “desist from such outdated practices”.[…]

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London Shortwave: numbers station on top of VOT broadcast

Psst, Buddy! Wanna Buy a Spy Radio?

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This unusual Ebay posting is one of the most interesting I’ve seen in a long time: a genuine, new spy radio transceiver!

Given its rarity and new condition, the $1,900 asking price seems reasonable to me for what a well-heeled collector might pay. The set is referred to as a “FIELD SET MODEL FS-5000 SHORT WAVE SPY RADIO”.

It comes as one carton containing four larger fiber boxes and three smaller fiber boxes, all containing modules that are combined to make a digital radio transceiver system.

spy_radio

spy_radio_xmtr

The seller says that the equipment (complete with shock-absorbing transit containers) bears no manufacturer marks, but was likely made in Germany by Telefunken. The various components look to be extremely well made, and the seller has provided these links for more information on this unusual 0.5-30 MHz transceiver:

http://www.cryptomuseum.com/spy/fs5000/index.htm

http://www.tuberadio.com/robinson/Information/FS5000/

http://www.prc68.com/I/FS5000.shtml

Be sure to check out all the clear photos provided by the Ebay seller of this fascinating transceiver.

Guy Atkins is a Sr. Graphic Designer for T-Mobile and lives near Seattle, Washington. He’s a regular contributor to the SWLing Post.

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Shortwave Numbers Stations on The Daily Beast

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Interest in shortwave numbers stations seems to wax and wane. We’re currently going through a period of increased interest (again) as I’ve been receiving quite a few messages from new readers asking where to find spy numbers and what type of shortwave radio is needed. Truth is, there are fewer and fewer numbers stations still on the air, though some are still quite reliable (like HM01).

The following article by Shane Harris at The Daily Beast is one of the better, more detailed, articles I’ve read in the popular press.

(Source: The Daily Beast via Southgate ARC)

The Stupidly Simple Spy Messages No Computer Could Decode

by Shane Harris

When I was 10 years old, I found a shortwave radio in a crumbling old leather trunk where we kept family photos and other memorabilia.

As I spun the dial, tinny, modulating noises, like the song of an electronic slide whistle, emanated from the radio’s small speaker. Staticky cracks and pops competed for airtime. The sounds swished and swirled, unintelligible and unremarkable. But then, emerging through the clamor, was a voice.

I might have run right over it with the dial, but the voice’s rhythmic, steady pacing caught me up short. It wasn’t a deejay. Nor a commercial. And he wasn’t singing. He was just speaking. The same line, over and over again.

“7…6…7…4…3.” Pause. “7…6…7…4…3.”

I don’t remember if those were the exact numbers. But they were numbers. A repeated sequence which had no obvious meaning, and was entirely devoid of context. To find him here, amidst the screeches and howls of the shortwave frequencies, was like coming upon a man standing in the middle of a forest, talking out loud to no one.

How long had he been here? Who was he talking to? He had that officious tone of the recorded telephone operators who chastised you for dialing a wrong number. “Please hang up, check the number, and dial again.” And the same distracting static I’d heard in those messages filled the background. I wasn’t sure if he was speaking live, or if he’d been recorded and set loose to play into the air.

But there was an urgency to his tone. And a purpose. As if he were talking to me. Imploring. Listen. Hear me now. 7…6…7…4…3. Did you get that? 7…6…7…4…3.

I was simultaneously terrified and captivated.[…]

Continue reading at The Daily Beast…

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