Model Number: Rockwell Collins 477U-2

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    ADF Antenna Simulator

    To view click here: Standard Warranty Policy   477U-2 Operation Manual

    Aero Express will buy, sell and  trade the 477U-2 depending on your needs.  The 477U-2 is designed to provide complete testing of the DF-203 ADF System when used with the 477V-2 ADF Test Set and rf signal generator, and complete testing of the DF-202G ADF System when used with the 477V-1 ADF Test Set.


    • The 477U-2 is used in conjunction with the 477V-2 for testing the Collins DF203/206 ADF systems
    • The 477U-2 provides simulated loop and sense signals to the ADF receiver

    90-Day Warranty


    Express Calibration is an Authorized ISO-17025 Calibration and Repair shop for the Collins 477U-2.  Visit for full capabilities.

    All units will be sold with a current calibration certificate. If factory new, a manufacturer’s Certificate of Conformance (C of C) will be provided.

    Since its inception, Express Calibration Services has supported Aero Express’ endeavors in providing test equipment support services.

    They perform calibrations for General Aviation, Corporate Aviation, OEMs, FAA Repair Stations, Military, as well as Regional and Air Transport Airlines. Express Calibration Services offers their services when you have a requirement for calibration or repair of your test equipment