Dutch public radio has always worked on a peculiar logic. Airtime is parcelled out among broadcasting associations - religious, political, secular - each of which has its own dues-paying members and its own day of the week. When Hilversum 3 launched in 1965, the schedule rotated through them in order: AVRO, VARA, EO and VPRO together, TROS, Veronica (which had gone legal), NCRV, and KRO. The Christian broadcaster EO would air a Sunday morning of religious music. By that afternoon, the freshly-legitimized Radio Veronica was playing the Top 40. The format was called 'vertical programming,' and it produced a station nobody could quite describe. It also produced a station everyone seemed to listen to - the diversity was the draw.

Commercial radio came to the Netherlands in earnest at the start of the 1990s, and Hilversum 3 - which had renamed itself Radio 3 - lost its monopoly on Dutch teenagers in a single decade. The response was a slogan and a chick. In April 1992, channel coordinator Paul van der Lugt rebranded the station as *de jongste zender van Nederland*, 'the youngest channel in the Netherlands,' with a baby chicken as the logo. He invented something called the sandwich formula: a familiar hit, an unfamiliar song, another familiar hit. The unfamiliar middle slice was supposed to teach listeners new music without scaring them off. By January 1994 the station had renamed itself again, this time Radio 3FM, marking its first full national FM coverage. By 1995 it had lost the audience lead to Sky Radio anyway.

In September 2003 a new channel coordinator named Florent Luyckx took over and decided the station needed to mean something. The name was shortened from Radio 3FM to just 3FM. A graffiti-style logo replaced the chick. The slogan was now *Serious Radio* - 'If you love music, you listen to 3FM' - and the playlist tilted aggressively toward album-oriented rock, alternative, and indie. Several veteran DJs left rather than work under the new format. Schedule changes piled up; another wave of departures followed in 2004 when Rob Stenders, Patrick Kicken, and Ruud de Wild all left within months of each other. Critics predicted the station's collapse. Instead it slowly rebuilt around younger DJs - Giel Beelen, Wouter van der Goes, Coen Swijnenberg, Sander Lantinga - and clawed its way back to first place. In November and December 2013, 3FM was the most-listened-to radio station in the Netherlands. It would not happen again.

In 2004 the station launched what has become its signature event: 3FM Serious Request. The premise is simple and brutal. Three DJs lock themselves inside a transparent glass house in a Dutch city square for the six days leading up to Christmas. They take requests by phone, by text, by donation. The longer the donations keep coming, the more songs they play. They do not eat. They live on water and juice. They sleep in shifts. The money goes to projects of the Dutch Red Cross. By the end of the run the city square outside the glass walls is packed with thousands of people who have come to watch hollow-eyed DJs spin records for famine relief. The format has been borrowed by other broadcasters in other countries. The original is Dutch.

Since 2015 the listening figures have been falling, and the station has not found a way to stop them. On 19 August 2014 the name had been changed once more, to NPO 3FM, to fold the national public broadcaster's identity into the brand. By 2018 NPO 3FM's national market share had fallen to roughly 2.9 percent, second-lowest among Dutch youth-oriented stations. DJs have come and gone. The slogan moved from 'Serious Radio' to 'Music Starts Here,' borrowing a touch from BBC Radio 1. The October 2015 fiftieth anniversary celebrations included four days of live broadcasts from the island of Pampus and a special concert at Paradiso in Amsterdam. The book Arjan Snijders wrote for the occasion gave the station's history a title that doubles as a self-portrait: *50 jaar 3FM: van Vrolijke Puinhoop naar Serious Radio* - 'Fifty Years of 3FM: From Merry Mess to Serious Radio.' Both descriptions still apply.