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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


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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


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.

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