TRIG TY91 / TY92 VHF Radios

Reference: 01079-00



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TY91 and TY92 VHF Radios

Trig’s compact radio is the ideal retro-fit that can be installed in the smallest panel. The TY91 is certified and highly capable. Easy to use and faster to tune, it takes up minimal space and weight. The unique ‘Push Step’ feature provides the fastest in class frequency selection. Dual Watch allows you to monitor two channels at the same time – it’s like having two radios in one. Compatibility with various EFIS systems enables remote control of the TY91 radio – it can even populate the on-route frequency from a connected GPS. A memory function provides fast frequency selection for your most used frequencies. A built-in intercom with mic gain adjustment on each headset ensures great performance, even when headsets brands don’t match.

Contact - Approved Trig Dealer now and benefit from our smart, affordable and future proof avionics.

Specification TY91 Radio TY92 Radio
Type Receiver – Class
C, Class E. Transmitter – Class 4, Class 6
Receiver – Class C,
Class E. Transmitter – Class 3, Class 5
Certification ETSO-2C169a, ETSO-2C128,
TSO-C169a, TSO-C128a
Compliance ED-23C, ED-67, DO-186B, DO-178B
Level B, DO-160F, DO-254 Level C
Supply voltage (DC) 11 – 33 V 22 – 33 V
Typical current consumption (at 14v) (at 14V) receive: 200 mA transmit: 2A (at 28V) receive: 130 mA transmit: 2.5A
Nominal Transmitter Power 6 Watt  16 Watt
Operating temperature for the radio unit -40 °C to + 70 °C
for the controller -20 °C to +70 °C
Cooling requirement No fan required
Weight 460 grams / 1.01 lbs
Dimensions (mm) controller: H 44 x W 63 x D 35 mm (74 mm depth in panel with D-Type connector fitted).
radio unit: H 48 x W 66 x L 160 mm (inc. socket).
Dimensions (inches) controller: H 1.73 x W 2.48 x D 1.37 inches (Depth 3 inches with D-Type connector fitted).
radio unit: H 1.88 x W 2.59 x L 6.29 inches (inc. socket)

  • Compact size, low weight – takes minimal panel space, only 74mm deep
  • Unique ‘Push Step’ feature provides the ‘fastest in class’ frequency selection
  • Dual watch – monitor two frequencies at the same time
  • Manual dimming feature (adjustable backlight)
  • Dual Control – two controller option for tandem cockpits
  • Simple Installation
  • Free European Minor Change approvals

Product Features

With a crisp clear display and simple user interface the Trig radio benefits from some great features; ‘Dual Watch’ feature allows monitoring of two frequencies at the same time. There are 9 pre-set channel memories which are easily selectable.

Trig’s compact radio is EASA ETSO and FAA TSO approved so it can be used worldwide. Our ‘Push Step’ feature enables the fastest tuning  in its class – three times faster than in an 8.33 environment! For customers who do not require 8.33 channel spacing this feature can be disabled, allowing speedy selection between 50 kHz and 25 kHz spacing. This enables rapid change of frequency whilst providing fine tuning in 25 kHz steps if required.

Trig radios also feature a built-in high quality two place intercom with an aux-input, saving further cost and weight.

GPS Compatibility

The radio can integrate with popular GPS units; this allows the automatic display of en-route radio frequencies. Control of the radio via an EFIS display is also possible using industry standard SL40 and GTR225 protocols. This unique capability integrates your Trig radio with other avionics and provides real user flexibility.

Product design

The innovative use of a control head and separate radio hardware unit provides more installation options, especially when space is at a premium. The control head can be conveniently mounted in a full 57mm (2 ¼”) round hole or even smaller compact mount. Fitting is straightforward, and once installed the depth of the radio control head is only 74mm (3”). In practice this means that the Trig compact control head can be located in an aircraft instrument panel where a ‘single box’ radio will simply not fit. The compact radio is the perfect comms partner to our compact transponder Mode S (1090 ES ADS-B Out transponders).

Push Step

The compact radio display is clear and bright, showing both primary and secondary frequencies. A ‘Push Step’ knob allows the fastest change from 8.33 kHz to 25 kHz – so you can tune the radio quickly without compromising your look-out. The Dual Watch feature allows two frequencies to be monitored at the same time – it’s like having two radios in one.


The Trig compact radio two place intercom is optimised for use with standard aviation headsets – a number of adjustments allow the radio to be used successfully in noisy aircraft.  The compact radio also has a built in speaker amplifier that can drive an external speaker, this is preferred by some glider pilots. If using a dynamic microphone with a Trig radio please note an amplified adaptor will be required.

  • All Trig products come with a two year warranty, starting from the day of installation
  • Installation manual and Operating manual
  • Installation kit (including plastic brackets for round mounts)
  • Tray
  • EASA Form One

Are Trig radios easy to use?
The radio interface is simple and intuitive. All controls are positive and give good feedback, and can be used with gloves on. The ‘PUSH STEP’ button is a unique feature and allows the fastest selection between 25 kHz or 8.33 kHz steps.

In areas where 8.33 kHz is not used the push step function can be set to change between 25 kHz and 50 kHz steps, making frequency selection just as rapid.

How does the 'Push Step' feature affect 8.33kHz tuning?
The 8.33/25K push step does not affect the mode of the radio. You cannot turn off the 8.33 capability. The push step is only changing the size of the steps when you are tuning. It's there to make tuning faster – 4 times less turns to reach your desired frequency. For example, if you tune to an 8.33 channel, then click the push step to display the small 25k symbol, then you are still transmitting and receiving on the 8.33 channel you selected... only the size of the tuning steps changes for when you next turn the tuning knob.

Is the controller display visible in all lighting conditions?
The LCD display is clear and crisp in all lighting, full sunlight generates a very clear contrast and in dull or dark lighting the inbuilt lighting ensures the unit remains clear and legible. The controller has a backlight and manual dimming can be selected to increase or decrease brightness.

How does the compact fit or full round installation work?
All units ship with the necessary parts to enable you to choose to install the radio either as a compact mount or 2 ¼ “ full round. The TY91 and TY92 kit includes a template to assist you in cutting an accurate compact mount hole in the panel. If a full round mounting is required then you simply fit the included plastic blanks above and below the body of the TC90 controller.

Can I link my GPS to the radio?
Yes, if your GPS supports the SL40 protocol then 8.33 channels, in addition to 25 kHz and 50 kHz frequency data and airfield identifiers will be displayed in the TC90 Controller display window. TC90 software version 1.5 adds support for 8.33 channel spacing on an SL40 GPS.

Will I need to change my antenna?
Trig's compact radios are designed to operate with your existing operational antenna. One of the advantages of the Trig radio is that the hardware box can be mounted away from the panel and close to the antenna. A shorter antenna cable reduces signal loss and improves performance.

Can I play music through the radio?
Yes - Trig's compact radios have the capability to play music through your headset via an auxiliary input (mono).

What type of headset should I use?
Trig radios are designed to work with a standard aviation headset. Audio performance is good on both noise cancelling and standard headsets. If you wish to use the radio with headsets that have a built in intercom, such as those used in microlights you are advised to contact to check compatibility. You may require a third party intercom adaptor.

Can I use the radio without a headset?
Both radios have a built in speaker amplifier, this supports the connection of an auxiliary speaker allowing headset free operation. This is ideal suited to glider pilots, who may prefer to fly without a headset. If using a dynamic microphone with a Trig radio please note an amplified adaptor will be required.

Can I use the radios in open cockpit flying?
The TC90 Controller is designed to be splash proof and can be used in these open and harsh environments.

Can I operate the radio on batteries?
Operation of the radio from a battery is a practical option given the efficiency of the radio. Your Trig radio can be relied upon for many hours when powered by battery, our installation guide, on the Trig web site provides guidance on the best power sources to select and the duration you should expect these to operate for.

Can I use a second control head, connected to the main hardware unit?
Yes – this is called Dual Control and is ideal for tandem gliders and tandem training aircraft.

How can I find out about the wiring required to install the radio?
For information on installing the radio both the operation manual and install manual can both be viewed or downloaded. Please find the manuals in the left hand navigation.


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TRIG TY91 / TY92 VHF Radios



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