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according to the code used by radio amateur operators, a special card, usually a post card, that confirms that communication was established between radio amateur stations or that their operation was observed.
QSL cards are generally colorfully designed and illustrated. They give the call letters of the radio station and its operator and the address; the date, time, and the frequency band on which the communication (observation) was obtained; the type of operation (voice or Morse code); an evaluation of the clarity, loudness, and quality of the signals; and a brief technical description of the apparatus. The cards are filled out by the radio amateur station operators after completing a conversation or after having received a QSL card from a radio amateur observer who has heard them transmitting. The cards are forwarded by mail through radio clubs. In the Soviet Union, QSL cards are forwarded by the E. T. KrenkeF Central Radio Club of the USSR. In other countries as well, QSL cards are sent out to confirm the reception of radio broadcasting stations.
REFERENCESSpravochnik korotkovolnovika, 3rd ed. Moscow, 1959.
Kazanskii, I. V. “Tvoi put’ v efir.” Radio, 1970, no. 8.
I. V. KAZANSKII