If you don't hear anything, probably Java is disabled or its version is too old (i.e., pre-1.4.2).
>>> Connect for 160m, 80m, 40m 160/80/40 WebSDR <<<
>>> Connect for 20m, 15m, 10m 20/15/10 WebSDR <<<
>>> Antennas can be disconected due to TX-activity at PI4TUE <<<
>>> These satellites are tracked: FO-29, VO-52, AO-07, SO-50, ISS, DO-64, UO-11, CO-55,
CO57, CO-58, CO-66, CO-65, HO-68, RS-39.<<<
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