
The Lahti Longwave Transmitter is a fascinating piece of history. It was built in 1939 by the Finnish Broadcasting Company.
Located in Lahti, Finland, this transmitter was used to broadcast radio signals to the surrounding areas. It's still standing today, although it's no longer in operation.
The Lahti Longwave Transmitter operated on a frequency of 228 kHz, broadcasting radio signals to a radius of approximately 300 kilometers.
Lahti Longwave Transmitter
The Lahti longwave transmitter was a facility for longwave transmission on a site known as Radio Hill in Lahti, Finland. It used to broadcast on 252 kHz on longwave.
The station was established in 1927-1928 and operated by the country's public broadcaster, Yle, until its decommissioning in 1993.
The station was located on Radio Hill as it is a central location that could cover all of Finland.
The first broadcast was on April 22, 1928.
The Finnish Radio and TV Museum, known as Mastola, is now located on the site, operated as part of the City of Lahti municipal museums.
Additional reading: Cairn Hill Transmission Site
The twin radio masts remain, still 316 metres (1,037 ft) apart, forming a well-known landmark of Lahti.
Here are the different frequencies the station broadcast on:
- 197 kHz (initial frequency)
- 167 kHz (shortly after the initial frequency)
- 166 kHz (in 1934)
- 160 kHz (after World War 2)
- 254 kHz (in 1955)
- 252 kHz (final frequency)
Information
The Lahti longwave transmitter is a significant broadcasting facility in Finland. It's located in Lahti, a city about 100 kilometers northeast of Helsinki.
The transmitter operates on a frequency of 198 kHz, a relatively low frequency that allows for long-distance transmission. This frequency is suitable for broadcasting signals over long distances.
Lahti longwave transmitter was built in 1936, and it has been in operation ever since. It has been upgraded and modified over the years to improve its performance and efficiency.
Description
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Related reading: Data Communication
Facts and Tips
The Lahti longwave transmitter is a remarkable piece of history, originally constructed in the 1920s. It was a vital part of Finland's broadcasting infrastructure, quickly becoming an important landmark for its technological prowess and strategic importance.
The transmitter is now a museum, offering visitors a unique glimpse into the past. It showcases the evolution of broadcasting equipment and the science behind longwave transmission.
The Lahti longwave transmitter is not just a static display, but a testament to the ingenuity and innovation of early 20th-century engineering. It's a tribute to the era when the airwaves connected people, delivered news, and provided entertainment long before the advent of the internet and digital media.

The museum exhibits include original transmitters, antennae, and other artifacts that tell the story of how radio waves were harnessed to carry information across long distances.
To get to the Lahti longwave transmitter, you can use public transportation. The nearest bus stops are:
- Konserttitalo (7 min walk, lines 4B, 4C)
- Mytäjäinen (7 min walk, lines 40B, 4B, 4C)
- Kauppatori B2 (10 min walk, lines 2, 4B)
- Fellmanninkatu (11 min walk, lines 1, 2)
These bus stops are easily accessible, making it convenient to visit the museum.
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