on 6270.4 NBFM
0830 hard to find at home, better via SDR near the Alps, music (some progressive rock~~)
offset 6270.4 from center of signal on the waterfall by KiwiSDR
0850 now some long R'n B with harmonica, and centered on 6270.2
(but setting the passband exactly above the signal center has no audible effect)