GTR 225B COM Radio 8.33 KHz 16W

Estimated Availability: October 2022

Part No:

Manufacturer: GARMIN

Garmin Aviation Comm Radio w/ Bluetooth

The new GTR 225B features 16w of transmit power and has the 8.33 KHz frequency spacing required by the European airspace mandate. This 760 channel Com offers a variety of features never seen before in a stand-alone com radio. A unique internal database makes it easy to find all frequencies at any given airport or VOR just by looking up the location name or identifier, or easily find the nearest airport, ARTCC, FSS, and VOR.

 It will also automatically recall the 20 most recently used frequencies as well as permanently store up to 15 frequencies. GTR 225B also features a large easy to read active/standby “flip-flop” display, standby frequency monitor function, internal 2-place voice activated intercom, built-in elapsed timer. System includes mounting rack and connector kit.

Whats in the box

  • GTR 225
  • Installation rack
  • Connector kit/backplate
  • Manual

Physical Characteristics

  • Bezel height: 1.35" (34.29 mm)
  • Bezel width: 6.25" (158.8 mm)
  • Rack height (dimple-to-dimple): 1.375" (34.93 mm)
  • Rack width: 6.30" (160.02 mm)
  • Depth behind panel with connectors (measured from face of aircraft panel to rear of connector backshells): 9.39" (238.51 mm)
  • GTR 200 weight (unit only): 1.34 lbs (0.61 kg)
  • GTR 200 weight (installed with rack and connectors): 1.91 lbs (0.87 kg)

General Specifications

  • Operating temperature range: -20° C to +55° C
  • Humidity: 95 percent non-condensing
  • Altitude range: -1,500 ft to 55,000 ft
  • Current draw¹ at 14 VDC:
    • 0.6 A, typical when receiving
    • 3.0 A, typical when transmitting
    • 7.5 A maxiumum, 90 percent modulated into 3.1 VSWR and 11 V power input voltage
  • Current draw¹ at 28 VDC:
    • 0.3 A, typical when receiving
    • 1.40 A, typical when transmitting
    • 3.75 A maxiumum, 90 percent modulated into 3.1 VSWR and 22 V power input voltage

Display Specifications

  • Display size (WxH): 3.4" (88.0 mm) x 0.843" (21.4 mm)
  • Active area (WxH): 2.95" (74.98 mm) x 0.486" (12.36 mm)
  • Resolution: 200 x 33 pixels
  • Viewing angle: left 45°; right 45°; up 10°; down 30°

COM Transmitter Specifications

  • Microphone input: Two inputs, standard carbon or dynamic mic with integrated preamp. The GTR 200 provides a 150 Ω AC input impedance and supplies the microphone with an 11 V bias through 470 Ω +/- 5 percent
  • Modulation capability: 85 percent with 250 to 2500 mVRMS microphone input at 1000 Hz
  • Modulation: AM double sided emission designator, 6K00A3E (118-136.975 MHz)
  • Frequency range: 118.000 to 136.975 MHz, 25 kHz channel spacing
  • Frequency tolerance: +/-5 ppm from -20°C to +55°C
  • Output power: 10 W carrier minimum
  • Duty cycle: 20 percent
  • Carrier noise level: At least 35 dB (SNR)
  • Stuck mic time-out: 35 seconds time-out, reverts to receive
  • Demodulated audio distortion: Less than 25 percent distortion when the transmitter is at 85 percent modulation at 350 to 2500 Hz

COM Receiver Specifications

  • Frequency range: 118.000 to 136.975 MHz, 25 kHz channel spacing
  • Headset audio output: 60 mW minimum into a 150 Ω load
  • Audio response: Less than 6 dB of variation between 350 and 2500 Hz
  • Audio distortion: Less than 25 percent at rated output power
  • Sensitivity: SINAD greater than 6 dB when the RF level is -107 dBm with 30 percent modulation
  • Squelch: Automatic squelch with manual override

Bluetooth Specifications

  • Available on GTR200B versions only
  • Bluetooth 3.0 Compliant
  • Supported profiles: A2DP and AVRCP (music) and HFP (phone)
  • Paired devices stored: 10
  • Connections allowed: 1 device
  • Supported devices: Phones, tablets, and GDL 51/52 (music)
  • Firmware updates: Free and field loadable by micro-SD card

¹The specified current draw is with the display backlight set to 100 percent.

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