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For the 2017 September 6 flare (SOL2017-Sep-06T11:53) we present not onlyunusual radio bursts, but also their interesting time association with theother flare phenomena observed in EUV, white-light, X-ray, and $\gamma$-rayemissions. Using our new method based on wavelets we found quasi-periodicpulsations (QPPs) in several locations of the whole time-frequency domain ofthe analyzed radio spectrum (11:55-12:07 UT and 22-5000 MHz). Among them thedrifting QPPs are new and the most interesting, especially a bi-directional QPPat the time of the hard X-ray and $\gamma$-ray peaks, and a sunquake start. Inthe pre-impulsive phase we show an unusual drifting pulsation structure (DPS)in association with the EUV brightenings caused by the interaction of magneticropes. In the flare impulsive phase we found an exceptional radio burstdrifting from 5000 MHz to 800 MHz. In connection with this drifting burst, weshow a U-burst at about the onset time of an EUV writhed structure and adrifting radio burst as a signature of a shock wave at high frequencies(1050-1350 MHz). In the peak flare phase we found an indication of anadditional energy-release process located at higher altitudes in the solaratmosphere. These phenomena are interpreted considering a rising magnetic rope,magnetosonic waves and particle beams. Using a density model we estimated thedensity, wave velocities and source heights for the bi-directionally driftingQPPs, the density for the pre-impulsive DPS and U-burst, and the density andmagnetic field strength for the drifting radio burst.

The 2017 September 6 Flare: Radio Bursts and Pulsations in the 22-5000 MHz Range and Associated Phenomena