http://websdr.ewi.utwente.nl:8901/
That receiver must be 95% deaf, I tuned 10 stations on my HF radio that are S9+20 and stronger and the online radio only heard one of them. Used shortwave stations broadcasting in AM mode and some SSB beacons.
If anyone whats to listen to HF communications, you are better off buying a GOOD shortwave radio that will tune in SSB also. Also an antenna switch with different antennas (vertical, dipole, long wire, etc) as you may hear just barely above the noise floor on one and 40 over on a different one. Make sure good coax and grounding also.
Receive only radios, you can expect to drop $300 on a multi mode