21 TV ANTENNAS, FM ANTENNAS, TV AND FM ANTENNA AMPLIFIERS, TV AND FM ANTENNA COUPLERS, TV AND FM LIGHTING ARRESTERS, TV AND FM SET COUPLERS, TV AND FM INTERFERENCE ELIMINATORS, MASTS FOR ANTENNAS, HARDWARE FOR ANTENNA INSTALLATIONS, TELEVISION PICTURE TUBES, CAPACITORS INCLUDING TRIMMER CAPACITORS, TUNERS AND TUNING CAPACITORS, VARIABLE AND FIXED CAPACITORS, DELAY LINES AND RELATED AND ACCESSORY STRUCTURES AND ELEMENTS