We are frequently asked about the difference between the MX-170B and MX-170C. We were curious about this too, so we asked the factory. TKM explained that they made a component change to the MX-170B in the middle of the production run. They considered it a minor change, and had planned to continue calling the radio an “MX-170B”. However, the European Union ruled that this change required them to change the radio’s name. From that time forward, these radios have been called the “MX-170C”.
We have not noticed any performance or reliability differences between the MX-170B and MX-170C. However, we can conclusively say that any MX-170C has been produced more recently than an MX-170B.
The MX-170C is the TKM radio designed as a slide-in replacement for the King KX-170B and KX-175B NAV/COMMs. There is more to the MX-170C than just painless installation. It features:
200 NAV channels
760 COMM channels
FM Immune (ICAO Annex 10)
Simultaneous digital display of both active and standby frequencies
Push button frequency flip-flop
10 memory channels
8 watts transmit power
Automatic squelch
