Radio.
the middle frequency in a superheterodyne receiver, at which most of the amplification takes place. Abbr.: if
[ 1920-25 ]
Radio.
the middle frequency in a superheterodyne receiver, at which most of the amplification takes place. Abbr.: if
[ 1920-25 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012