Growing Up with Electronics in Soviet-Era Estonia
I was born in Tallinn, Estonia during the Soviet occupation. From early childhood I was fascinated by transistors, and thanks to my parents’ jobs I had access to some of the best Soviet-made electronics available at the time.
I began building small transistor radios and amplifiers when I was still very young.
At night I listened to radio waves under my bedsheet, making sure my parents never noticed. They believed their children were asleep after the local TV station ended its nightly broadcast.
My parents supported my hobby, and my usual birthday presents were multimeters.
I constantly “measured the resistance of the Soviet electricity system” by accidentally burning those devices. This became a family joke, and everyone happily donated a new one. My parents were never supporters of Communism or the Soviet occupation.
Shortwaves was my favorite, but AM during a nighttime was interesting.
Western Radio Signals Behind the Iron Curtain
Most Estonians listened to the local Vikerraadio night program, which occasionally featured banned broadcasters. When the broadcast ended for nightly maintenance, Radio Caroline often appeared on a nearby frequency. The Estonian Broadcasting Network used a 50 kW tube-based transmitter that needed cooling, and during that downtime Caroline’s signal became audible.
A good antenna was essential, so I wired our apartment balcony myself.
As a teenager, the music from Radio Caroline felt like a secret world. Behind the Iron Curtain, almost nobody knew this kind of British alternative music. Some enthusiasts knew BBC-managed Radio Luxembourg, but Caroline’s sound was something entirely different.
I was listening the night Radio Caroline sank. The emotions of that moment have stayed with me ever since. When I tried to wake my parents, they told me I must have had a nightmare.
Finnish visitors were allowed to come to Tallinn, and Finnish YLE TV was freely viewable in northern Estonia. Because our languages are similar, many Estonians had friends across the bay, and we were loyal consumers of Finnish media. Eurovision broadcasts were especially popular, even if the music was not always to my taste.
Music—cassettes and LPs—circulated among Estonian youth together with jeans and plastic bags. These items were forbidden for Soviet citizens, so the militia often confiscated them and resold them on the black market.
My friends, usually older than me, were fans of Pink Floyd, Led Zeppelin, the Rolling Stones and similar bands.
Disco music, especially Boney M, was allowed and even encouraged by the regime, while many rock artists were banned. Somewhere online there is a list of Soviet-banned musicians, including Debbie Harry (Blondie), John Lydon, Black Sabbath and others.
Building My Own Pirate Radio Station
With access to transistors and music—and inspired by Radio Caroline—I felt compelled to build my own pirate radio station. Of course, this was not something one could openly promote, as the KGB had ears everywhere.
I built the station inside a small metal box and used a cheap Soviet cassette player as the audio source. Soviet 4.5‑volt batteries were inexpensive and widely available in toy stores.
Soviet manufacturers struggled to produce transistors capable of handling high frequencies and power. The KP903 was good enough for hi‑fi amplifiers, while the KP913 was rare and usually military grade.
In reality, they were the same transistor. After production, the units were measured and labelled according to their characteristics.
My station used a single military‑grade KP913 and operated on the AM band. Transistors capable of FM frequencies and crystals for high‑frequency generation were practically unknown in the Soviet Union. My transmitter used a simple transistor–capacitor–coil oscillator with several filters.
The design had issues, as it also broadcast on unintended frequencies, but that did not stop me from getting the station on the air.
The output power depended on the voltage supplied to the transistor. By connecting multiple 4.5‑volt batteries, I could reach 40–50 volts, but this made the transistor extremely hot. Cooling became a major challenge. Fortunately, scrap metal was freely available, and with help from metalworkers I built a proper heatsink. In the West, small fans were used for cooling, but Soviet metal did the job.
I estimate the station’s power was somewhere between 10 and 25 watts.
Finding a Place to Broadcast
Another challenge was where to connect the antenna and ground.
My neighbourhood consisted of tall apartment buildings, so placing the transmitter on a rooftop was the obvious solution. But determining the correct grounding and antenna points was beyond my teenage understanding. I simply connected one wire to any metal structure and another wire to a different metal part of the building. With around 300 apartments, the entire building became my broadcasting system.
The setup consisted of a cassette player, a metal‑boxed transmitter with a heavy cooling plate, and a bundle of batteries taped together. I only needed to hide it somewhere on the roof.
During my first broadcasts, I stood outside the buildings watching for the KGB.
Soviet cassettes usually held 30 minutes of audio, while Western ones were 60 or 90 minutes. I decided that 20–30 minutes was enough for one broadcast and used Soviet tapes.
Eventually, some military‑coloured vehicles with roof antennas appeared. Later I learned they were not KGB but a secret organisation studying “anomalies in the aether”, similar to Soviet groups researching “unidentified flying objects” under the Academy of Sciences. Their “UFO” of the era was the American SR‑71.
They drove around and parked nearby but never located my transmitter.
Broadcasting Western Music to Estonia
After my initial broadcasts of “allowed music” recorded from Soviet‑made plastic discs—Paul McCartney, Simon & Garfunkel and others—I began speaking on air and introducing “unknown” artists. It was exciting to hear what kind of voice I could create for my teenage DJ persona.
When I obtained a Sex Pistols recording, it immediately went on the air. I had no idea whether anyone was listening. But the next day, while riding an electric bus, I heard the driver playing a recording of my broadcast through the bus speakers. Creative people often worked as bus drivers, and some connected their personal cassette players to the internal speaker system, originally meant for announcing stops.
Estonians loved John Lydon’s voice, and they enjoyed hearing my attempts to imitate his style.
When I got my hands on Kate Bush’s “Wuthering Heights”, it became another highlight of my pirate broadcasts.
Nina Hagen, Frank Zappa and other unique artists also became regulars on my station. I assume many people thought this mysterious signal was some kind of CIA project aimed at influencing Estonian youth.
