in 1986 I lived in Caversham (SE England) about 50 km west of London – a friend in high school built one of these..
Initially we accidentally set it on the same frequency as the VHF communications radios of the local buses (as frequency plans were restricted info back then) – so every bus driver for about 1km around heard music through their comms speakers – we got a warning from the chaps at the BBC Receiving Station (who thought it was hilarious we had the cojones to set up a pirate station right under their noses) – they told us “if you are going to do that pick your frequencies carefully and make sure you don’t cause interference where the aircraft radios are as that will get you in more trouble.
5W might not seem like a lot but in open countryside high up can go about 10km 😉
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