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ThoughtCriminal

(14,757 posts)
8. Time to dust off the Skrigjaargen Polka
Tue Mar 14, 2023, 12:50 AM
Mar 2023
https://en.wikipedia.org/wiki/S%C3%A4kkij%C3%A4rven_polkka#Military_usage

During the Continuation War, the Finnish Army discovered that the retreating Soviets had scattered radio-controlled mines throughout the re-captured city of Viipuri. These mines were set off when a three-note chord was played on the frequency the radio was tuned to; each mine had three tuning forks that oscillated at specific frequencies unique to each mine.

On September 1, the General Staff in Vyborg received one broadcast van from Yleisradio, capable of transmitting over the frequency used by the mines. Säkkijärvi polkka was present among the van's record collection and to prevent the enemy from operating the mines, they started playing the Säkkijärvi polkka - and specifically the version recorded by Vesterinen - without any pauses. This way the frequency over which the triads used by the enemy to detonate the mines were interfered with to the point that the mines were completely unusable.



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