Possible Clues:

• 3-D trick-picture fad of the '90s
• Wise men about to look at radio tuner
• With tear-gas enveloping Joe, you sound an alarm with this
• 3-D trick-picture fad of the 1990s
• Sounds like that first person is brilliant before tube in radio receiver
• Small cathode-ray tube in radio receiver to help tuning
• *1990s 3-D picture fad
• Tricks to observe for tuning a radio
• Radio receiver's tuning aide