despite the very weak signal:
there is XFU... (Rudy van Dalen, 1992)
a QSL from the treasures of Andreas Ibold (1991)
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Callsigns:
XFU
XFU2
Frequencies Voice:
2182
2270
2320
2805
4393
4394.6
4417
8779
8780.9
8803
8805.7
13137
13162.8
Frequencies Morse Telegraphy:
441
451
470
488
489
500
4285
4346
6367
8656
12477
12775
22477