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Nicholas MorenoAug 7, 2025
What to do if my ARTEX Transmitter shows a 4-Flash?
- TTaylor BrownAug 7, 2025
A 4-Flash indicates that the 406 or 121.5 MHz output power is low, or the transmitter module is faulty. First, check the coax cable and connections, and ensure the antenna is properly installed. If the issue persists, and the transmitter module frequency is out of limits, it cannot be repaired in the field and should be returned to the factory for servicing. You may also try lengthening or shortening antenna coax cable length by 4 to 6 inches.
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