Cold War–era Soviet amateur radio QSL card used to confirm long-distance radio contacts between operators. QSL cards function like postcards for ham radio enthusiasts—sent after a successful transmission to verify that a signal was received [2977×3199]

Cold War–era Soviet amateur radio QSL card used to confirm long-distance radio contacts between operators. QSL cards function like postcards for ham radio enthusiasts—sent after a successful transmission to verify that a signal was received [2977×3199]

by roadtrip-ne