EFR Europaeische Funkrundsteuerung (Radio Ripple Control), Burg :

 

this is how it sounds like (ASCII-200 Bd) (rb, 2008)
look at the 3 station signals with their data telegrams on a spectrum receiver (rb, 2009)
here tuned to the hungarian signal from Lakihegy on nominal 135,6 kHz, with Mainflingen 129,1 to the left and Burg 139 kHz to the right

 

this fine QSL-card was received by Marcel Kurtz (2008)
here is a view of the transmitter site at Burg, formerly a big site with many AM-band stations (rb, 2014)

 

See their homepage for more details on the transmissions

 

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Callsigns:
DCF39

 

Frequencies Radioteletype:
139

 

Systems used:
ASCII 200 Bd