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Part# 11-18830
MFR Model# MX-170C


The MX170C NAV/COMM is designed to be electrically and mechanically interchangeable with the Bendix King KX170 & KX175 series of NAV/COMM radios. The channeling outputs are for 40-channel glide slope (King Glide Slope) and 200 channels (King Slip Code).

Features active & standby display with flip-flop capability, plus storage capability in Nav and com.


  • Frequency Range: Comm – 760 channels 118.000 to 136.975 Mhz Nav – 200 channels 108.00 to 117.95 MHz Preselect channel storage capacity – 100
  • Frequency stability: +/- .003%, -20C to 50C
  • Transmitter Power: 8 Watts min
  • Modulation: 85% minimum with limiting at 90%
  • Sidetone: Adjustable to 40 mw into 500 ohms
  • Receiver Sensitivity: 1.5uV (soft) for 6db s+n/n or 1/2 flag Nav
  • Comm Selectivity: 6db @ +/- 7.5 Khz; 50db @ +/- 17.5Khz; 60db @ +/- 25 Khz
  • Nav Selectivity: 6db @ +/- 15 Khz; 50db @ +/- 35Khz; 60db @ +/- 50 Khz
  • Squelch: Noise adaptive squelch with manual override
  • Audio Output: 5 watts into a 4 ohm speaker; 40 mw into 500 ohm headphones
  • Demod Output: VOR adjustable from .25 to .75 arms
  • Weight: 5 lbs
  • Size: 6.03″ wide x 2.5″ height x 14″ mounting depth
  • TSO: C34e, C36e, C37d, C38d, C40c



Prompt delivery and easy installation.

Ss K
March 10, 2021

I had two problems when I installed the MX170C in my 1978 Mooney 201: 1-The old KX-175B was stuck, since it had not been removed from the panel since 1991. To pry it loose I had to remove the audio panel above the radio, the old LORAN to the right of the radio, and the other KX-175B below the radio. 2-The KX-175B and the MX170C require different size hex wrenches. Once I solved those problems, the MX170C went in easily and worked perfectly when I switched it on. I am very satisfied.

M. A
December 14, 2020

Having used coms with the frequency flip flop feature many times before I was a little disappointed with my new to me airplane having dinosaur KX 170s in both slots. After about a year living with them, and thinking I would have some panel upgrades done to several items at the same time, the Covid 19 thing has put dreams of a big upgrade on indefinite hold. I bit the MX 170 bullet and performed the install myself. It went surprisingly easy and took only about 10 minutes. The new MX 170 is performing great and I am so happy staging my next freq for when I need it with a push of the button! Little things like this spread out the workload and really help make flying more fun.

Ray A
July 21, 2020

Radio arrived on time and in good condition, was exactly as advertised and works perfectly. Very easy install and no surprises. Very happy with purchase, product, and service.

Craig R
April 10, 2020

Good replacement for a tired KX-175 in my Citabria. 5 minutes to remove the old NavCom and install the new one. Most of that time was spent removing the packaging. Good value. Like the Flip/Flop and memory functions.

Ed C
February 19, 2020

Love it . Turn one screw , pull out old KX170B and slide in new MX170C and turn another screw . Like the advantage of having the flip flop channel selection .

Joseph H
July 28, 2019

Ive used these radios in several planes for 30 years. Slide them in and they work whether replacing King, Narco or Cessna radios. So far they have been trouble-free.

Robert E
September 14, 2018

Slid right in and works perfect. Nice upgrade from the KX175 i was using.

August 17, 2017

Replaced 1 of my 2 king 170Bs original equipment in my 1979 Warrior II. Plug and play installation except for different size Allen wrench to latch in slot. Works fine channeling the KN75 glideslope ki209 indicator and KN62A DME. Works great except had to tweak squelch level a hair. Adjustable with small flathead screwdriver thru hole in front panel. Easy to tune and swap frequencies. Also can preset and select up to 50 com and nav frequencies but requires 2 hands to scroll thru presets as you must hold 1 button down and momentarily press another to scroll to next. Only comments are com volume knob also rotates to turn power off and no mark on knob to see how high you have set the com volume after turning radio on. I painted a white dot on the knob to see the volume level. Also must keep holding. the TEST button down to disable squelch to receive weak com signals. Would be better if it would flip/flop the squelch on or off. The. Old King 170B could switch the squelch off continuously on the rare occasion it was necessary. Has reception sensitivity just as good as the old King radios.

Robert H
October 20, 2020


Q: What CDI units will work with the the TKM MX170?

This is a replacement for the King KX 170 & 175 series Nav/Coms and the CDI you used with the King will work with the TKM 170C. Otherwise the TKM MC-60 is the only one TKM recommends.

Q: I see you list only 14 volt version. Will this work as a replacement for a 28V King 170B?

No, the only version TKM makes is for the 14 volt replacement for the KX 170 & 175 series.

Q: Does the Michel MX170C accommodate glide slope? Is this a new unit?

As this is a direct slide in replacement for King KX 170- and 175 series Nav/Coms, the Michel MX 170 would support the same glide slope indicators. This is a new unit.

Q: What is a Warranty information for the MX170C Nav/Com radio?

The manufacturer’s warranty is 2 years for the MX170C Nav/Com radio.

Q: Will the MX170C replace the KX170-B w/ ILS Localized & GSM VORs?

Yes the MX170C is a direct slide-in replacement for the KX170-B. This will hook right up with the existing equipment in the aircraft that the KX170-B is hooked up to without any additional installation.

Q: Regarding the Michel MX170C NAV / COM Radio: Will the backlights brighten and dim, where the backlights won't be too bright at night?

Per the manufacturer, the MX170C will automatically dim dependent upon ambient light conditions. The sensitivity can be adjusted using the trim pot located on the front panel.

Q: Does this Michel MX170C Nav/Com come with an installation kit (tray and connectors)? If not is a kit for a new installation separately available?

This unit does not include a tray or connectors. These are sold as drop in, plug and play replacements. Trays and connectors are only available on the used market.

Q: Whats the differance between the MX170-B and the MX 170-C?

There was a transducer changed in the MX170B to meet new European standards, after changing the transducer TKM had to update the model number to MX170C to be in compliance with FAA standards.

Q: Can the owner replace this Nav/Com and make a logbook entry without an A&P or Avionics shop?

Per the manufacturer a logbook entry can suffice but we recommend talking to your A&P to process any paperwork accordingly.

Q: Are the internals digital or analog? Replacing KX175 where the analog tuning knobs have failed.

The display is digital.

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