066-1077-01

KDF 806 automatic direction finder receiver 066-1077-01

066-1077-01 is the exact Part Number for this BendixKing / Honeywell KDF 806 automatic direction finder receiver. The rack-mounted unit receives compatible low- and medium-frequency NDB signals, processes bearing information and supplies audio and bearing outputs to the connected aircraft avionics. This exact -01 version is specifically documented with a Superflag output for EFIS use. It is not interchangeable with other KDF 806 suffixes merely because the housings look alike.

The partner listing confirms Part Number 066-1077-01, overhauled condition, EASA Form 1 and a six-month warranty. The photographed factory plate shows KDF 806, P/N 066-1077-01, serial number 8047, 27.5 VDC marking, weight of 3.6 lb, TSO C41c Class A and a DO-160A environmental category. These identifiers should be matched to the release documentation for the allocated unit before shipment.

ADF reception and bearing processing

The KDF 806 covers 190 to 1799 kHz in 1 kHz increments according to the installation manual. A jumper-selectable 2182 kHz marine emergency frequency is also documented. In ADF operation, the receiver processes signals supplied by a compatible loop-and-sense antenna system and produces bearing information for the cockpit indication chain. Received audio is routed through the aircraft audio installation.

The receiver manual describes DC sine/cosine or three-wire synchro indicator-output arrangements selected by installation configuration. It also provides lock and flag information. For exact P/N 066-1077-01, the documented Superflag output supports compatible EFIS interfaces; Garmin installation data specifically notes that this Superflag feature belongs to the -01 KDF 806 version.

KDF 806 and KFS 586 system connection

The standard cockpit control for the receiver is the 071-1210-04 KFS 586 family control unit. A typical approved path consists of a KA 44B antenna feeding RF information to the KDF 806, crew frequency and mode commands arriving from the KFS 586, and bearing or flag outputs continuing to the selected RMI, indicator or EFIS. These are functionally related units, not replacement alternatives.

Accurate operation depends on antenna condition, triaxial cable, rack contacts, power supply, control data, audio wiring and indicator interfaces. A bearing failure can originate at any point in this chain. Troubleshooting should use the approved KDF 806 installation and maintenance manuals plus the aircraft wiring diagrams.

Electrical and environmental characteristics

The installation manual specifies an input range of 11 to 33 VDC with approximately 15 W typical consumption. Where a three-wire synchro output is used, 26 VAC at 400 Hz and approximately 3 VA is additionally required. The documented operating range is -55 °C to +70 °C, with an altitude reference of 50,000 ft and 95% relative humidity at 50 °C for 48 hours.

The receiver should be installed in the approved rack with correct cooling space, connector engagement, grounding and circuit protection. Exact wiring depends on selected DC sine/cosine, synchro, flag and EFIS interfaces. A rack, connector, antenna or KFS control is not assumed to be included unless listed in the quotation.

Overhauled configuration and ordering

This 066-1077-01 KDF 806 is offered in Overhauled condition from partner stock with a six-month warranty. Availability and the EASA Form 1 for the specific serial are reconfirmed during quotation. The price applies to the exact -01 configuration and stated condition.

Before ordering, compare Part Number 066-1077-01, receiver model, modification status, rack and connector with the aircraft equipment list. Specify required quantity, destination, documentation and the installed KFS control or display interface. Related avionics are listed in the Garmin / BendixKing / Honeywell / Collins category; related products are not interchangeable without approved technical data.

During incoming inspection, confirm the receiver housing, connector interface, locking mechanism, factory plate, modification marks and electrostatic warning label. The bench test should verify tuning across the documented frequency range, receiver sensitivity, audio output, bearing accuracy, flag logic and the -01 Superflag function where used. The supplied release paperwork must identify the same complete Part Number and serial number as the allocated receiver.

Product Type: Automatic direction finder receiver

Designation: 066-1077-01

Manufacturer: BendixKing / Honeywell

Model: KDF 806

Function: ADF signal reception, bearing processing, audio and compatible indicator / EFIS output

Associated Control Unit: KFS 586 / KFS 586A family

Associated Antenna: KA 44B

Frequency Range: 190–1799 kHz in 1 kHz increments

Optional Frequency: 2182 kHz by approved jumper configuration

DC Power Supply: 11–33 VDC

Typical Power Consumption: 15 W

Synchro Reference Supply: 26 VAC, 400 Hz, approximately 3 VA when three-wire synchro output is used

Special Output: Superflag output for compatible EFIS installations on exact P/N 066-1077-01

Operating Temperature: -55 °C to +70 °C

Altitude Reference: 50,000 ft

Humidity Reference: 95% RH at 50 °C for 48 hours

Weight: 3.6 lb according to the photographed factory plate

Certification Marking: TSO C41c Class A and DO-160A reference on the photographed plate

Photographed Serial Number: 8047

Condition: Overhauled

Warranty: 6 Months

Documentation: EASA Form 1 according to the partner listing

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In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.