Castle K was a 1980s Dublin pirate radio station which was based in Castleknock and run by John Carroll.
It started in March 1984 and broadcast on FM only.
Over the festive period in 1984 the station changed name to BFBS.
It was on FM only, the frequency was 104.5MHz
By March 1985 it had merged with Radio Zodiac and the service became weekend only.
Timeline for these stations with a shared history:-
March 1984: Castle K FM launch
June 1984: Radio Zodiac launch
December 1984: Castle K FM change name to BFBS
March 1985: Radio Zodiac join with BFBS
June 1986: Radio Zodiac relaunch and share time with Caroline 98, a relaunch of BFBS
We are extremely indebted to Ciarán Brannelly for his help with these station histories.