A big QSO-round is on around 1645 Khz at 2150 Utc. Involved stations are Nordzee, Happy Miner, Barcelona and Monte Carlo. Good conditions on mediumwave this evening. Other heard station was Torpedojager. Could not catch any ID as most stations arrived with O=2/3. It is seldom that I hear so many mediumwave stations at my QTH.