When you want to upgrade your radios, one of the common barriers is the cost and hassle of installation. Wouldn't it be great to just slide a replacement right into the existing rack? If you have thought this, you should know about TKM.

TKM has developed a special niche in the avionics market. They make only direct replacement radios for common older avionics. This means that the owner of a TKM radio can quickly and easily replace the original radio at no installation cost, while enjoying convenience features such as frequency flip flop, frequency memory, and a bright easy-to-read display.

The MX-300 is the TKM radio designed as a slide-in replacement for a variety of 14 volt ARC radios. The most common replacements are the following radios:

• ARC RT-328D
• ARC RT-328T
• ARC RT-528E

If you have an older 14 volt ARC radio, we may be able to supply an adapter that allows the MX-300 to replace it. (Please contact us for price and availability.)

This radio is available with either a black or tan faceplate, to better match your radio stack.

There is more to the MX-300 than just painless installation. It features:

• 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

These are the most common indicators used in MX-300 installations (the same as with an RT-328T installation):

For VOR/LOC installations:

• IN-514R VOR/LOC Indicator
• IN-514B VOR/LOC Indicator (with backcourse light)

For VOR/LOC/Glideslope installations:

• IN-525A VOR/LOC/Glideslope Indicator & R-443B Glideslope Receiver
• IN-525B VOR/LOC/Glideslope Indicator (with backcourse light) & R-443B Glideslope Receiver

If you have any questions about this item, please click to send us an email.