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Part #:

Model: KX-165





Part Number :

  • Solid state, gas discharge digital display NAV/COMM Transceiver
  • 720 or 760 frequency COMM available (see table below)
  • 200-channel NAV receiver
  • 40-channel glideslope receiver (version dependent - see table below)
  • Built-in VOR Converter
  • Digital display of radial from VOR or VORTAC in lieu of standby NAV frequency
  • 10 watts power output
  • 14 or 28 volt versions available (see table below)
  • Push button frequency flip-flop with display of active and standby NAV and COMM frequencies
  • Models available with 25 or 50 kHz COMM receiver selectivity (see table below)
  • Used with KI-202 VOR/LOC or KI-206 VOR/LOC/GS indicators
  • Similar to KX-155 Nav/Comm but DOES include built-in VOR converter and radial display
  • TSO'd


Size: 6.25"W x 2.05"H x 10.16"L Weight: 4.75-5.50 lbs. depending on version
TSO Compliance: RTCA DO-160 Ebv. Cat. A1D1/A/KPS/XXXXXXZBAAA Temperature Range: -20 to +55C
Altitude: -15,000 to 50,000 feet TSO Compliance (COMM): Transmit: C37b (DO-157, Class 4); Receive: C38b (DO-156, Class C & D) / C38b (DO-156, Class A) 50 kHz selectivity
Applicable Documents (COMM): RTCA DO-156, DO-157, DO-160 Duty Cycle (COMM): 10%, 4.5 minutes receive, 0.5 minutes transmit
Frequency Tolerance (COMM): 0.0015% to meet DO-156 Class C & D Power Output (COMM): 10 watts minimum
Modulation (COMM): 85% modulation capability with 90% limiting, less than 15% distortion at 85% modulation. Audio leveling circuit used. Sidetone Output (COMM): Adjustable up to 100mW into 500 ohm headphones
Harmonic Content: Greater than 60dB down from carrier Receiver Sensitivity (COMM): 2uV (hard) or less (typically 1 uV) for 6 dB S+N/N with 1000 Hz tone modulated 30%
Receiver Selectivity (COMM): (25Khz SEL): 6dB bandwidth +- 8.1kHz, 60dB bandwidth +- 20.0kHz; (50KHz SEL): 6dB bandwidth +- 14.5kHz, 60dB bandwidth +- 43kHz; Squelch: Automatic squelch with manual disable and carrier override
Spurious Response (COMM): at least 80dB down TSO Compliance (NAV): C36c (DO-131, Class D); C40a (DO-153, CAT A and B)
Applicable Documents (NAV): RTCA DO-131, RTCA DO-153, RTCA DO-160, RTCA DO-195 and RTCA DO-196 Frequency Tolerance (NAV): 0.0015% to meet DO-153, CAT A and B
VOR/LOC Sensitivity: 1/2 flag sensitivity 2uV (hard) or less (typically 1uV) on all channels Receiver Selectivity (NAV): 6dB bandwidth shall not be less than 16.0 kHz on each side. 60dB bandwidth shall not be less than 31.5 kHz on each side
Spurious Responses (NAV): at least 80dB down VOR Course Accuracy: Two sigma limit 3 deg. as specified in RTCA DO-153
Audio Output (NAV): With a 1 kHz tone 30% modulation at least 100mW output into 500 ohm loads Audio Response (NAV): Less than 6dB variation from 350Hz to 2500Hz
LOC Centering: Two sigma limit +-7 uA as specified in RTCA DO-131 TSO Compliance (GS): C34c (DO-132, Category II, Class D)
Applicable Documents (GS): RTCA DO-132, DO-160 Stability (GS): 0.0015%
Sensitivity (GS): 20uV or less for 60% of standard deflection Inputs (Audio Amp): 2-500 ohm Auxiliary Inputs
TSO Compliance (Converter): C40a (DO-153, Class I and II); C36c (DO-131, Class D) Course Width (VOR): 10 deg. +-1 deg. externally adjustable
Course Width (LOC): 90uA +-5uA for ddm of 0.993 ddm or 4dB Input Impedance (Converter): 60 kohm for 0.5Vrms input (VOR mode)
Part Number NAV/COMM/VOR/LOC Converter Description:
069-1025-00 14 volt, without Glideslope Receiver, 720 COMM channels
069-1025-01 14 volt, with Glideslope Receiver, 720 COMM channels
069-1025-02 14 volt, without GS Receiver, 50kHz Selectivity, 720 COMM channels
069-1025-03 14 volt, with GS Receiver, 50kHz Selectivity, 720 COMM channels
069-1025-04 28 volt, without Glideslope Receiver, 720 COMM channels
069-1025-05 28 volt, with Glideslope Receiver, 720 COMM channels
069-1025-06 28 volt, without GS Receiver, 720 COMM channels, 50kHz Selectivity
069-1025-07 28 volt, with GS Receiver, 720 COMM channels, 50kHz Selectivity
069-1025-20 14 volt, without Glideslope Receiver, 760 COMM channels
069-1025-21 14 volt, with Glideslope Receiver, 760 COMM channels
069-1025-22 14 volt, without GS Receiver, 50kHz Selectivity, 760 COMM channels
069-1025-23 14 volt, with GS Receiver, 50kHz Selectivity, 760 COMM channels
069-1025-24 28 volt, without Glideslope Receiver, 760 COMM channels
069-1025-25 28 volt, with Glideslope Receiver, 760 COMM channels
069-1025-26 28 volt, without GS Receiver, 760 COMM channels, 50kHz Selectivity
069-1025-27 28 volt, with GS Receiver, 760 COMM channels, 50kHz Selectivity



- Nav/Comm w/ GS

NSN: 5821-01-392-4589

Price Condition Status
- Nav/Comm w/ GS (14V)
Price Condition Status
- Nav/Comm w/ GS (14V)
Price Condition Status
- Nav/Comm w/o GS
Price Condition Status
- Nav/Comm w/ GS

NSN: 5895-01-268-1467

Price Condition Status
- Nav/Comm w/o GS
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

Yes. Southeast Aerospace recommends that Service bulletin 1 and 2 be complied with on the KA-120 when the adapter is being installed on a new installation.

Service Bulletin 1 corrects an impedance mismatch between the new generation KX-155 and KX-165 Nav/Comms that utilize surface mount technology. KA-120 with serial number 1845 and above have Service Bulletin 1 incorporated during original manufacturing. The cost to add SB 1 is approximately $200.

Service Bulletin 2 corrects a serial tuning bus incompatibility when interfacing the KA-120 with a KX-125 and with new generation KX-155 and KX-165 surface mount units (post Mod 16 units). KA-120 with serial number 2819 and above have Service Bulletin 2 incorporated during original manufacturing. Honeywell does offer warranty credit for any KA-120 S/N 2818 and below that requires this modification. An authorized Honeywell Service Center must perform the modification and submit the warranty claim.
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.
This does not pertain to the comm selector channel spacing.

With the evolution and growth of airborne travel and the necessity for more usable frequencies in the VHF communications spectrum, the "channel" spacing became smaller. To avoid interference between channels the bandwidth of the RF stages was decreased from 50khz to 25khz. In doing so, another problem was introduced. If the ground transmitter or the air to air transmitter was not capable of tighter frequency tolerances, it was possible the 25khz RF selectivity would not allow the receive signal to pass and the aircraft crew could miss critical voice communications.

Due to the presence of older, outdated equipment in some countries, some manufacturers (namely Bendix/King and Collins) produced VHF comm radios with the 50khz receiver selectivity. With the recent mandates and technological advancements in Europe and South America, the requirements for the 50khz versions has diminished. If an operator were to use a 50khz version radio in the position of a 25khz, they would potentially have channel crossover and or an increase in background noise.
The smaller concentric knob on the Nav side of the KX-165 has a PULL RAD label on it. When this knob is pulled, a radial mode for the KX-165 is enabled where the right hand window of the NAV display indicates the bearing FROM a station. In addition, a digital warning flag is activated when weak signals are present. Also, when an ILS frequency is selected, the digital flag is displayed in the radial window.
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.
Navigation (Nav) and Communication (Comm) radio receivers and transceivers are available as separate, individual radios or as a combined Nav/Comm unit.

A Nav/Comm unit is sometimes more economical in price than the 2 separate Nav and Comm radios and usually requires less panel space.

Obviously, one disadvantage to the combined Nav/Comm unit is in the case of unit failure you lose both nav and comm functions since the entire unit is removed.
KN-53 Nav:

KY-196A Comm:

KX-155 Nav/Comm:


While there are many indicator options for the KX-165, the more commonly interfaced indicators include the following:

(VOR/LOC only)

(VOR/LOC Glideslope)



There is no Service Bulletin that approves the modification of a KX-155 to add a VOR/LOC converter. The main PC boards in the KX-155 and KX-165 are different thus allowing for one to have converter capabilities (i.e. KX-165) and one to not have this capability (KX-155). Any KX-155 that has a VOR/LOC converter board is a Suspected Unapproved Part (SUP) and should not be installed into a certified aircraft.

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.

For more information, please refer to these other Exchange FAQs

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.

A power converter or booster is required to provide enough power to increase the 14 volts from the aircraft to 28 volts to operate the KX-155. The max amperage needed is 6.0 A for the transmit portion of the KX-155 and KX-165. Therefore, we recommend the Ameri-King AK-550-6.

The KX-155 and KX-165 LED display upgrade involves more than simply changing a display assembly as it was with the original gas discharge displays
manufactured in the KX-155 and KX-165 radios.













The LED kit includes several parts including wire for the 9 circuit jumpers, fuse, resistors, capacitor,
LED display and a display driver board.






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.