TX57 Nav/Com

Part No: TX57

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OPTIONS: TX57(8.33 kHz, 16W, 22-33V)

Trig’s TX56 and TX57 Nav/Com units provide the ideal platform to update legacy avionics or equip your new aircraft. Slimline and highly efficient both Nav/Com models are housed within a superbly engineered case. At only 33mm high each unit saves valuable space yet contains an impressive selection of practical features for any pilot.

You might be a VFR pilot wanting VOR navigational back up, a flight school seeking an easy to use training platform or a serious VFR/IFR operator looking for reliable digital capabilities. Trig’s ‘better by design’ approach has created a Nav/Com that meets all these requirements – it will enhance your navigation and communication throughout all phases of flight.

The TX56 family of products will be available with 8.33 kHz channel spacing or conventional 25 kHz spacing, with 10 Watt or 16 Watt transmit power. The TX56A and TX57A are 760 channel radio versions (non 8.33 kHz for use outside Europe).


The Nav/Com display is clear and bright, showing both primary and secondary frequencies along with airfield / VOR identifiers. A ‘Push Step’ knob allows the fastest change from 8.33 kHz to 25 kHz (TX56/TX57) or 25 kHz to 50 kHz (TX56A/TX57A)- so you can tune the Nav/Com quickly without compromising your look-out. Dual Watch feature allows you to monitor two Com or Nav frequencies at the same time – it’s like having a second radio.


The radio has a ‘Say Again’ feature. A single button press replays the last radio transmission.  This feature is ideal for student pilots, but every pilot can get distracted, so it avoids the embarrassment of asking air traffic to repeat a message.


The Nav receiver is optimised to provide stress free operation. Both the TX56 and TX57 will decode Morse, identifying VORs or ILS. The Nav receiver can monitor a second VOR which significantly enhances route navigation. This means that a standby VOR radial can be displayed in addition to the primary VOR – allowing the pilot to quickly calculate an accurate position fix.


The unit display features a graphical CDI (course deviation indicator) This allows the pilot to navigate without an external CDI. The TX56 also provides support for various display options, using a range of external cockpit instruments.

Once tuned the Nav receiver can identify the station by de-coding its Morse identifier, automatically identifying the selected VOR. Automatic centering of the CDI needle displays a direct bearing to a selected VOR for ease of navigation whilst the to/from button allows you to display the inbound or outbound radial.


The Nav/Com’s low profile design requires no external cooling fans.  The compact size and features make it a great choice for both forward and retro-fit installations. Each Nav/Com is designed to easily integrate with legacy products, these include the popular SL30 which is the same height as a TX56. Customers replacing legacy KX155 and KX165 models will easily accommodate a TX56 in their stack, in all cases a TX56 tray will need to be fitted.

  • Slimline – only 33mm high

  • Bright, clear display / simple user interface

  • Unique ‘Push Step’ for faster tuning

  • Dual Watch – monitor two com or two nav frequencies at the same time

  • ETSO and TSO approval (pending)

  • Stereo music / two place intercom

  • ‘Say Again’ feature – allows playback of last transmission

  • USB port on facia – upload over 200 com and nav frequency database (CSV file)

  • VOR/ILS receiver – monitor a 2nd VOR

  • Built in VOR/LOC converter

  • Built in digital CDI

  • Built in 40 channel glideslope receiver

  • Highly efficient – no cooling fans or external cooling required

  • Ideal retro-fit for legacy radios – unit is same height as an SL30

  • Unbeatable quality – designed and manufactured in the U.K.

  • Two year worldwide warranty



TX56 / TX56A Nav/Com

TX57 / TX57A Nav/Com




ETSO 2C128, 2C169a, 2C34f, ETSO 2C36f, 2C40c
TSO-C128a TSO-C169a, C34e, TSO-C36e, C40c


ED-23C, ED-67, DO-186B, DO-178B Level B, DO-160G, DO-254 Level C

Supply voltage (DC)

11 – 33 V

22 – 33 V

Typical consumption (at 14v)

(at 14V) receive: 265 mA transmit: 2A

 (at 28V) receive: 140 mA transmit: 2.5A

Nominal Transmitter Power

10 Watt

 16 Watt

Operating temperature

-20°C to +55°C

Cooling requirement

no fan required


1.1 kg / 2.42 lbs

Dimensions (mm)

 33 x W 159 x L 270 mm

Installed depth in tray (mm)

230 mm long

Dimensions (inches)

H 1.3” x W 6.26” x L 10.63”

Installed depth in tray (inches)

9.05” long

Questions & Answers

See below for answers to our most popular questions.

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