今日4月18日は、IARU(国際アマチュア無線連合)が定めた「 世界アマチュア無線の日 World Amateur Radio Day(WARD)」です。 World Amateur Radio Day Every April 18, radio amateurs worldwide take to the airwaves in celebration of World Amateur Radio Day. It was on this day in 1925 that the International Amateur Radio Union was formed in Paris. そう…