The TKM MX 300 Nav/Comm is designed to replace the RT 328T, RT 308C, RT 328T, RT 328A, RT 528A, RT 328C, RT 528E, RT 328D, and RT 508A. The MX 300 is available in the black face plate shown left or in a beige face plate to match many Cessna panels. The MX 300 operates on 13.75 vdc w/7 Adc max current in transmit.
Note: We do ot offer 8130 forms on these units.
760 Channel COM
200 Channel NAV
Digital display with active/standby frequency with "Flip-Flop"
100 Channel Memory
8 Watt Min.
Noise Adaptive Squelch
Two Year Factory Warranty
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% min. with limiting at 90%
Sidetone: Adjustable to 20 mw into 500 ohms
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 vrms
Weight: 5 lbs.
Size: 6.7" wide x 3.00" high x 11.75" mounting depth
TSO: C34e, C36e, C37e, C38d, C40c
I bought one of these new and installed it 6 years as a replacement for an old Cessna RT-328D NAV/COM. It has always worked faultlessly. Within the last month I received another spontaneous favorable comment from the pilot of another aircraft who commented upon the strength and clarity of my transmission. In my view it is unbeatable value for money.
What is the current price for this item?
On the webpage you can use the drop down box to select either the black or tan faceplate. Once selected, the current price will show.
I am wanting to replace my RT 328, It has no designation letter after its RT 328 marking Will the MX300 replacement work?
Per the manufacturer, the MX300 would be compatible as a slide in replacement for the RT328 without a designation letter.
11-18835 wanted to know if that is compatible with the KI-206 indicator head?
No, the MX 300 part number 11-18835 is not compatible with the KI-206
Will this MX 300 match up to my existing indicator?
As the MX 300 is a direct replacement for the RT 328T, RT 308C, RT 328T, RT 328A, RT 528A, RT 328C, RT 528E, RT 328D, and RT 508A, it is compatible with existing indicators that had these original Nav/Comms.