Data related to NMR experients in superfluid 3He-B in DryDemag cryostat in 2018. The main part is oscilloscope signals and spectrograms of HPD (homogeneously precessing domain) where we have found spatially-localised oscillation modes. We attribute some of these modes to oscillations of theta-solitons in HPD. Files: data2018_dd_hpd_1.tgz -- All data except oscilloscope signals (2.0Gb). data2018_dd_hpd_2.tgz -- Oscilloscope signals (5.9Gb), archive is splitted into three parts with split(1) program.