TKM MX300 NAV/COM Radio Transceiver 14V P/N MX300 S/N 1188

Vintage Aircraft Avionics

• Brand: TKM Inc.
• Manufacturer Part Number: MX300
• Model: MX300 NAV/COM Transceiver
• Serial Number: 1188
• Voltage: 14V (13.75V DC)
• Condition: Used
• Warranty: No Warranty
• Country/Region of Manufacture: United States
• Compatible Make: Cessna, Piper, Beechcraft (common fits)
• Compatible Model: Replacement for ARC RT-308 RT-328 Series
• FCC ID: C9L715MX300
• Features: Digital Display, Flip-Flop Tuning, VOR/LOC, 760 COMM Channels, 200 NAV Channels

Vintage TKM MX300 NAV/COM Transceiver – Ideal for Cessna aircraft avionics upgrades or restorations. This 14V aircraft radio is a reliable slide-in replacement for older ARC Cessna radios like RT-308, RT-328A/T/D. Removed from a working plane for upgrade – great for general aviation parts, bench testing, or vintage rebuilds.

Key Features & Specs:

• COMM Section: 760 channels (118.000–136.975 MHz), 12W+ transmit power for clear aircraft communication.
• NAV Section: 200 channels (108.00–117.95 MHz), VOR/LOC receiver with ID outputs for precise navigation.
• Digital Displays: Bright LED (active yellow, standby red) with flip-flop frequency swapping for easy tuning.
• Power: 13.75V DC, low draw (1.8A receive, up to 7.1A transmit) – perfect for 14V systems.
• Design: Compact panel-mount unit, plug-and-play in many GA aircraft like Cessna 150/172/182.
• Weight: Approximately 6-8 lbs, durable metal construction.

Unit Details:

• Part Number: MX300 (FCC ID: C9L715MX300).
• Serial Number: 1188.
• Removed From: Aircraft Tail No. N220NY (removal tag included).
• Removal Reason: "REMOVED FOR UPGRADE" – No issues noted, pulled during modern avionics swap.
• Manufacturer: TKM, Inc., Scottsdale, AZ.

Condition Report: Cosmetically solid – Original knobs, buttons, and faceplate intact with minimal wear (see photos). All connectors clean, no bent pins or damage visible. Untested here (no aircraft or bench setup), so sold AS-IS for restoration, or project use. Could be overhauled by specialists like Bevan Avionics. Inspect photos closely!

What's Included:

• TKM MX300 unit only.
• No tray, harness, antenna, or manual.

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