I managed to get stable TDoA measurements this morning using KiwiSDR network and repeated measurement runs gave very consistent results with very high probability of this source in Kaliningrad.
Possible transmitter site 54.638024806374716, 19.897280518534938
With centre fed antenna or T antenna between two masts. Antenna wires clearly visible in tourist photos on Google Photosphere.
Steve Whitt to mwcircle iog (2022-12-03)