NDB Ostrava *N/R :
here is a recordings of *R-534, made with the help of OK2KYJ's online Kiwi-SDR (rb, 2021)
this is *N-258, recorded a few weeks later on the same receiver (rb, 2021)
no pictures of QSLs or other info available
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Callsigns:
N
R
Frequencies Morse Telegraphy:
221
232
258
534