On March 23rd I received UR1 also on 1377 kHz, location unknown, possibly one of the old 7 kW transmitters which I found listed in the old WRTH 2000. Much weaker than 1278 kHz, but strong enough to fight back against TWR Gavar relay. Clear during TWR's switching pause at 18h15 to 18h17 UTC. 73! Frank