Radiowaves.FM - A tribute site to Irish Radio

Castle K


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.

Is there anything you can add to the information above?
Or do you know of a station not listed in the database?
Please send any updates, from the seemingly trivial to full station histories, using the form below.
Images etc can also be sent to

Station Update