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.

Garmin is pleased to announce a new series of VHF NAV/COM radios, the GTR and GNC series. As the replacement products for the popular SL30 and SL40 models, the GTR series COM transceivers and GNC series NAV/COM radios include a breadth of new features to reduce pilot workload, while also offering an affordable solution to meet the requirements of the 8.33 kHz channel spacing mandate recently enacted by the European Union under the Single European Sky (SES) initiative. These products have truly reinvented the stand-alone aviation COM radio with novel features like reverse database look-up and the COM monitor function, which bring new efficiencies to cockpit radio management.

Let the versatile GTR 225 Comm radio reduce the amount of work you do in the cockpit. Not only does the GTR 225 meet the basic needs of most pilots – including adhering to new airspace requirements in Europe – but features a number of advanced features that save you time and effort.

Choose Your Installation

The GTR 225 is available in 3 versions to fit your needs. Two of these models are available with 25 kHz frequency channel spacing and 8.33 kHz channel spacing to meet the impending Single European Sky mandate that all aircraft in Europe will need to operate with by 2018. It's also available with either 10 W or 16 W of transmitter output, letting you find the right balance of power and price. All 3 versions include a 2-place intercom that’s ideal for 2-seat aircraft; no additional hardware is required to communicate with your passenger. Plus, remote frequency flip-flop capability can help in demanding operating environments like helicopters, letting pilots keep their hands on the controls.

Reduce Your Workload

In addition to traditional Comm features, the GTR 225 incorporates a number of functions that can save you time and effort. Provide the GTR 225 with an airport identifier and it will automatically find its frequency (and vice versa) thanks to a built-in, updateable database. Easily store and recall commonly used or most recently used frequencies by an assigned name using the device’s internal memory. When installed with a compatible GPS source like the GTN or GNS series avionics, you can view facility name and type when tuned to a valid station.

Never Miss a Transmission

With its standby frequency-monitoring feature, the GTR 225 gives you the ability to listen to ATIS while monitoring ATC. Swapping your active and standby frequencies is done with a single touch of a button. No longer will you have to worry about missing an ATC call or other critical transmission. You can also use the built-in timer to assist with approaches, holds and other assigned maneuvers.

  • 16W Comm with 8.33 kHz spacing
  • Flight Service Stations, ATC facilities, WX stations, etc.
  • Active and standby flip-flop frequencies
  • One-touch 121.5 emergency channel tuning
  • Comm frequency monitor function (listens to standby while monitoring the active)
  • Recall of frequency from database by facility name and type
  • Database reverse lookup of frequencies providing station ID andfrequency use (TWR, ATIS, etc.)
  • Volume control bar graph display
  • Alphanumeric display of frequency types (ATIS, GRND, TWR, etc.)
  • High-visibility alphanumeric LCD display
  • Transmit status indicator
  • Backlit keypad controls
  • Automatic and manual, pilot-selectable display intensity control
  • Built-in, two-place voice activated intercom
  • Frequency memory and recall
  • Stores/recalls 15 user defined frequencies
  • Stores/recalls previous 20 frequencies used
  • Squelch test function
  • Stuck mic time-out
  • 12 W audio amplifier
  • Specific versions for fixed wing and helicopter installations

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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