noun
radio operator; radio enthusiast; ham
Refers to someone who operates or is deeply interested in radio, especially amateur radio.
彼は熱心な無線家で、毎晩アマチュア無線を楽しんでいる。
He is an avid radio enthusiast and enjoys amateur radio every night.
Compound of 無線 (musen, 'wireless, radio') and 家 (ka, 'person, specialist').