Ensure a high-quality ground connection. Poor grounding is the #1 cause of radio noise. Audio and Mic: Microphone Audio: Pin 7. Key Line: Pin 11. Audio Output (Phone): Pin 5 & 6.
Finding a "full" paper manual for the Narco Escort II can be difficult since Narco Avionics is no longer in business. However, core installation data and wiring diagrams are available through archival aviation resources. 🛠️ Installation Resources
Maintain a minimum bend radius of 3 inches for all coaxial cables behind the radio tray to avoid signal loss or impedance mismatches. Post-Installation Testing and Calibration narco escort ii installation manual full
Test the intercom functionality using the designated P301 Pin 12 function.
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Requires a V-dipole NAV antenna, typically mounted on the vertical stabilizer or top of the cabin. Install a signal splitter if sharing this antenna with a secondary NAV receiver.
The Escort II uses a standard 15-pin D-sub connector. Accuracy here is critical to avoid blowing the internal fuse or damaging the cavity tube. Ground Pin 2: External Standby Pin 3: Identification (Ident) Button Pin 4: Reply Light Pin 5: Cavity Tune (Factory Use Only) Pin 6: +13.75V or +27.5V DC Power Pin 7: Lighting (Dimmer Bus) Pins 8–15: Encoder Inputs (Gray Code) Key Line: Pin 11
: Keep coax cable runs at right angles from antenna elements as much as possible before bending toward the cabin. 4. Mounting Procedures
The Escort II requires a 50-ohm VHF comm antenna (118-136 MHz) and a separate VOR/LOC antenna (108-118 MHz) if using the NAV function. The manual specifies:
⚠️ Since Narco is out of business, technical support is limited. For internal repairs or bench testing, you may need a specialized harness kit like those mentioned on FCCID.io .
For those seeking further information on avionics maintenance and installation standards, several resources are available: