Part #:

Model: KR-87




ADF Receiver

Part Number :
Bendix Logo
  • Digitally tuned solid state automatic direction finder which provides bearing information to stations in the frequency range of 200 KHz to 1799 KHz and which also provides audio reception to enable pilot to identify stations
  • Used with KA-44B combined loop/sense low profile ADF antenna OR KA-44 blade antenna
  • Can be used with single needle KI-227 ADF indicator or dual needle KI-228 indicator (both indiactors available with manual or slaved compass cards)
  • May be interfaced to King KI-229 or KNI-582 RMIs
  • Can be interfaced with other 3-wire RMI indicators by way of KDA-692 RMI adapter
  • Models available with single or dual indicator driving capability (see table below)
  • Models available with ADF Superflag output for use with EFIS systems (see table below)
  • Internal timer for flight time and elapsed time which proves valuable for non-precision timed approaches, fuel management, dead reckoning navigation
  • Automatic dimming circuit adjusts the brightness of the display to compensate for changes in the ambient light level
  • Coherent detection design rejects unwanted frequency interference, achieves significantly greater range and has less suspectiblility to engine noise, static and atmospheric interference
  • Flip-flop frequency display allows to switch between pre-selected "standby" and "active" frequencies
  • Operates on any voltage from 11-33 VDC with 12 watts power consumption
  • Models available for 28 volt use only (see table below)
  • Models available with 5 volt display lamps (see table below)
  • Models available with standard or shiny display lens (see table below)
  • Models available with clear or blue display light (see table below)
  • Models available with backlit nomenclature (see table below)
  • Forced air cooling not required
  • TSO'd

Additional Information: Click Here for Pilot's Guide

Size: 6.32"W x 1.35"H x 10.73"L Weight: 2.9 lbs.
TSO Compliance: TSO C41c Class A, DO-160 Env. Cat A1D1/A/SKP/XXXXXX/ZBABA Applicable Documents: RTCA DO-142
Frequency Range: 200KHz to 1799KHz in 1 KHz increments Receiver Selectivity: 6dB bandwidth: +-2 KHz max off center frequency; 80dB bandwidth: +-7 KHz max off center frequency
Bearing Accuracy: +- 3 degrees from 70 uV/m to 0.5 V/m RF input signal level Power Requirements: 11 to 33 VDC, 12W typical
Temperature Range: -20 to +55C Altitude Range: Up to 50,000 feet
Receiver Senstivity: 150uV/m max for s+n/n = 6dB Spurious Response 80dB down +-12KHz from center frequency
Indicator Drive: DC sine and cosine voltages 4.5 +- 3.0VDC at 150mA max Audio Output: 50mW across 500ohm
Part Number ADF Receiver Description
066-1072-00 Standard lens, Single Indicator Use, 14/28V lamps, clear lighting
066-1072-01 Shiny lens, Single Indicator Use, 14/28V lamps, clear lighting
066-1072-02 Standard lens, Dual Indicator Use, 14/28V lamps, clear lighting
066-1072-03 Shiny lens, Single Indicator Use, 14/28V lamps, clear lighting
066-1072-04 Standard lens, Single Ind Use, Superflag output, 14/28V lamps, clear lighting
066-1072-05 28V only, Std lens, Dual Ind Use, Superflag output, 14/28V lamps, clear lite
066-1072-06 Exclusively for the CNI-5000 radio package, Standard lens, Single Indicator Use, Superflag output, 5V lamps, blue lighting, No Faceplate
066-1072-07 Standard lens, Single Indicator Use, Superflag output, 5V lamps, blue lighting
066-1072-14 Std lens, Single Ind Use, Superflag, 14/28V lamps, clear lite, backlit nomen - this P/N also used for Silver Crown Plus version
066-1072-15 28V, Std lens, Dual Ind, Superflag, 14/28V lamps, clear lite, backlit nomen
066-1072-17 Std lens, Single Ind Use, Superflag, 5V lamps, blue lite, backlit nomenclature


- ADF Receiver

NSN: 5895-01-287-3705

Price Condition Status
- ADF Receiver

NSN: 1680-01-597-7850

Price Condition Status
- ADF Receiver

NSN: 5826-01-421-1135

Price Condition Status
- ADF Receiver
Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.

No, common ADF systems such as the Bendix/King KR-87, KDF-806 and Collins ADF-60A, ADF-650A utilize their own unique antennas within the systems (i.e. KA-44B, ANT-60A/B, ANT-650A respectively). In addition, in most cases, these antennas are different sizes and have different hole patterns from each other.
None, they represent the same unit. Original King Radio part numbers were 9 digits. For example, 066-3056-01. During the Bendix and King merger (i.e. Bendix/King), a new part numbering system was created that converted these 9 digit part numbers to 12 digits. Therefore, 066-3056-01 became 066-03056-0001. Despite this numbering change, units that were originally from the King Radio design still have the 9 digit part number format on the unit dataplate. The 12 digit format for King units appears to be used for catalog and internal Honeywell purposes only. Therefore, any unit that has a zero in its third to last number (i.e. XXX-XXXX-X0XX) has a 9 digit part number (i.e. XXX-XXXX-XXX) on its dataplate / ID Plate.
In January 1989 Bendix/King changed from a nine digit to a twelve digit part numbering system. The new, larger 12 digit numbers allowed for the inclusion of software version into the last two digits of the part number for certain units in which software changed frequently such as EFIS and TCAS processors. Therefore, the two digits immediately preceding the software version indicate the hardware version of the unit.

Different software versions imply different operational features and/or interface capabilities and software modifications imply software repairs (bug fixes) to insure proper operation of these features and interfaces. Software version upgrades frequently require hardware modifications to the unit. Such hardware modifications accompanying software version upgrades do not necessarily change the hardware version of the unit.
The Silver Crown + has a different bezel style than the original Silver Crown. All Silver Crown + bezels are backlit so that the lettering on the faceplate can be seen at night.

Please see example below of the different versions:

The use of a Radio Magnetic Indicator in an aircraft offers several benefits that improve navigation situational awareness and pilot workload.

A very basic ADF indicator without a moveable compass card simply points to a selected beacon. The pilot must calculate the bearing needed based on the aircraft's current heading. Most if not all ADF indicators without a knob to turn the compass ca rd are very old and obsolete.

Most ADF indicators include a knob to turn the present heading so that the bearing to the beacon can be read against the compass card.


The RMI provides all of the ADF indicator functions with automatic rotation of the compass card via the aircraft's compass system. Therefore, whenever the aircraft turns then the compass card will turn.

An RMI always automatically points to the bearing to a beacon. This is a more logical form of indication even over VOR type of navigation since there is no OBS, To-From, radials, etc.





More advanced RMI indicators offer even more flexibility and features by offering dual needle for ADF and VOR bearing and multiple ADF/VOR navigation.








Not completely. The -01 versions include a stepper motor that is driven from the directional gyro within the compass system. Therefore, when the aircraft turns, both the compass card on the HSI and ADF indicator will turn accordingly. Unlike an RMI, however, these ADF indicators must be synchronized to the HSI compass card by rotating the SYNC knob until its heading matches the HSI. An RMI automatically updates the heading on the compass card.

Until the used market completely dries up, you can still find someone who will sell you a KR-85. The KR-85 may have been a cost effective, reliable unit at one time but unfortunately its time has passed. Most old avionics units become increasingly challenging to repair as the manufacturers discontinue support and cut off the supply of service parts. Likewise, even if you can find a KR-85 in working condition, it usually has little or no warranty.

Instead of continuing to invest your money in obsolete technology and delaying the inevitable, Southeast Aerospace suggests upgrading to the KR-87 ADF. Investing in the KR-87 will provide you with an ADF that includes warranty and support for many years to come. Plus, since the KR-87 is smaller it will free up valuable panel space in your aircraft.
KR-87 receivers with serial numbers above 10999 or with Mod 3 have incorporated a change in flight timer operation. Instead of the flight timer resetting to zero by an external switch, the flight timer will stop and hold on the accumulated time. The only way to reset the flight timer to 0 in such units is to turn the KR-87 off and then back on. This method of operation will enable those who have the flight timer connected to the landing gear or squat switch to be able to note their flight time after landing. If this feature is not desired, simply leave pins J and K on the KR-87 rear connector open. This will cause the flight timer to begin counting when the KR 87 is turned on and will continue until it is turned off or the power is removed.

Negotiating the exchange price of a unit only limits the allowable repair cap for the core unit. Southeast Aerospace's exchange transactions are based on the return of economically repairable core unit. Once the core is received and evaluated, the core repair cost incurred by SEA cannot exceed 75% of the original exchange price. That is, it cannot cost SEA more than 75% of the original OH/SV exchange price collected from the customer. Therefore, when and if an SEA exchange price is discounted, there is a risk that additional charges may be assessed once the core is returned and evaluated.

The part number for the terminal contact pin that is used on most Silver Crown units is 030-01107-0000. Previously, Honeywell (Bendix/King) offered them in preset amounts based on the unit that were being used with (ex. 030-01107-0064 for the KX-155). Currently, you simply purchase the amount of -0000 pins required.

As of 2010, the List Price for each contact pin is $5.98. Therefore, in most cases, it is less expensive to buy the entire unit installation kit.

In 28 Volt aircraft installations, Service Bulletin 6 can be incorporated into the KR-87 to drive 2 KI-227 ADF indicators.