Bass guitarist
Milan Hlavsa and poet
Pavel Zajíček launched DG 307 in 1973, taking the name from a psychiatric diagnosis that allowed young men to obtain a
blue booklet and thus avoid compulsory military service. Together with
the Plastic People of the Universe, a band Hlavsa had also been a member of, DG 307, among other underground ensembles, was a target of persecution by the
communist regime. The repression climaxed in 1976, when Zajíček was arrested and imprisoned for a year, allegedly for
disorderly conduct. After his release, only two DG 307 concerts took place, in 1979. In 1980, Zajíček emigrated and the group went on indefinite hiatus. The
Velvet Revolution in 1989 made it possible for Zajíček to return to his homeland, at which point he reestablished the band and became its lead singer. Since 2016, the group has been inactive due to Zajíček's health. The only permanent member of DG 307 throughout its existence was Pavel Zajíček. The group had a rotating membership of musicians that at various times included
Josef Janíček,
Jan Sahara Hedl, and
Eva Turnová. ==Partial list of band members==