Circuit Avionics - Flight Simulator Hardware
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Radio Panel with Transponder / TCAS Selector

Standard Edition and Premium Edition are functionally identical. More information is given below.

Click or tap to enlarge.

Standard Edition and Premium Edition are functionally identical. More information is given below.

Click or tap to enlarge.

COMBI PACK - Standard Edition

Category:
Autopilot, Radio + Transponder
SKU:
COMBI25-S
Price:
£556.14£598.00
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Description

This listing is for the COMBI PACK STANDARD EDITION which includes the Universal Autopilot and Radio + Transponder Panel (Standard Edition).

 

Read about the Universal Autopilot HERE.

Read about the Radio + Transponder HERE.

June 2025 Update

We now have support for FS2024!

The existing MSFS aircraft profiles work in both FS2020 and FS2024

Many thanks for the excellent feedback. It's great to see so many pilots enjoying their new hardware

Standard / Premium Edition

We have created two editions for the Radio Stack, to suit your style and budget

This is the listing for the Standard edition. See our other listings for the Standard version

The only difference between the editions is the aesthetic look of the control knobs, including the Transponder / TCAS knob

The underlying construction, electronics and functions remain identical

  • Standard Edition: features durable, off-the-shelf knobs for a balance of aesthetics and affordability.
    • Black-and-white rotary knobs. Guitar-style knob for the Transponder / TCAS control.
  • Premium Edition: for pilots who want to more closely replicate the look of a Boeing aircraft.
    • Custom-design knobs, made to order using SLS technology. The TCAS / Transponder is based on that of the Boeing 737.
Key Benefits for Flight Simulator Pilots
  • Tune aircraft radios with ease - no more fiddly mouse controls
  • Two independent Radio Systems - COM/NAV/ADF (1 and 2) - plus Transponder
  • Tactile Feedback: Feel precise 'detents' on the knobs as you rotate to the next frequency
  • Durable all-metal construction, laser-machined and engraved for outstanding quality
  • Look inspired by Boeing 737, but designed to work with virtually any aircraft
  • Powerful, free, easy to use software allows customisation of every function
  • Great companion for Offline or Online Flight (VATSIM, IVAO, PilotEdge)
  • Removable stand: no tools required to have lie-flat pedestal setup

Read on for more details!

Quality Construction + Components

Designed and assembled in the UK

We ship worldwide!


  • Laser-cut steel: heavy (1.4kg, 3.2lbs), sturdy character
  • Angled stand: ergonomic desktop viewing
  • Convertible: stand detaches for home cockpit/pedestal mount
  • Professionally coated: Boeing Grey colour for authentic experience
  • Laser engraved text: accurate and indelible for long-term ownership
  • Neoprene feet: anti-slip performance
  • Tactile Feedback: Feel precise 'detents' on the knobs as you rotate to the next frequency

Overall Dimensions: Height: 22cm - Width: 16cm - Depth: 13cm (6cm excluding the removable stand)

Rear case dimensions for pedestal cutout: Height:21cm - Width: 15.6cm - Depth: 3.2cm

Radio and Transponder Features

2-in-1 Radio Stack: Two Independent Systems in One Panel

The radio stack comprises two indendent systems, activated by System Selector 1 and 2 at the top

  • System 1 - COM1/NAV1/ADF1
  • System 2 - COM2/NAV2/ADF2

The selected System is illuminated

Each System has its own ACTIVE and STANDBY frequencies

The TFR (transfer) button swaps the ACTIVE and STANDBY frequency for the selected System


DME Mode (Distance Measuring Equipment)

Shows distance to the active VOR / DME station, in nautical miles

  • Push the NAV decimal knob (DME MODE) to toggle
  • Distance to the Active VOR/DME station is displayed
  • NAV1 and NAV2 each display their own DME

Adjustable Display Brightness

Push the VHF -/+ knobs (labelled DISP BRT) to adjust the brightness of the numeric displays


VHF (COM1/2) features

MIC and MON (monitor) selectors on each radio, illuminated when active

8.33 kHz compatible, thanks to the six-digit COM VHF displays

Monitor the ATIS on COM2, or use it as a transmit frequency

Can be used with built-in ATC (MSFS). Assign knob push to ATC Menu option


NAV1/2 and ADF 1/2 features

Morse code ID selector for each receiver, illuminated when active

ADF Supports decimal frequencies (can be configured as required)

ADF2 and other radios can be enabled / disabled as required, depending on aircraft equipment


Transponder / TCAS features

IDENT button (lights up when active, 18-second timer)

5 selectable modes based on Boeing 737:

STBY, ALT RPTG OFF (i.e. mode A), XPDR (i.e. mode C), TA ONLY, and TA/RA

Can be mapped to corresponding mode switches on other aircraft


Bonus Feature

Rotary knobs also have a push function. Assign to ANY function of the simulator or aircraft

Suggestions:

  • ATC menu option 1,2, etc. for offline flight
  • Transponder conspicuity codes
  • Aircraft functions such as landing gear
  • Toggle entirely new modes such as DME, BARO setting.. any sim variable can be displayed and manipulated! You choose how you want the panel to work

Functions may vary based on the aircraft and developer

Powerful Software Control

The Radio Stack is configured and operated exclusively through the MobiFlight software application

MobiFlight is a powerful, free, open-source and widely-adopted solution for advanced Flight Sim hardware users. Circuit Avionics is a proud sponsor of the project

MobiFlight is able to work seamlessly alongside other hardware solutions such as SPAD.neXt and AxisAndOhs (no conflicts)

Simulator Compatibility

  • Microsoft Flight Simulator 2024 on PC
  • Microsoft Flight Simulator (2020) on PC
  • Prepar3D versions 3-6
  • Microsoft Flight Simulator X
  • Microsoft Flight Simulator 2004
  • X-Plane versions 9-12

MobiFlight communicates natively with X-Plane, and with MSFS (FS2020 / FS2024) via the included WASM module

FSX and Prepar3D users need to download FSUIPC (free version)



A still from the Setup video. Subtitles are available in all languages.

First-Time Setup

First-Time Setup takes 2-3 minutes for most users

A video guide provides step-by-step instructions for software installation and operation

Further support is available if required!


Aircraft Profiles

The panel is operated by loading an Aircraft Profile into the MobiFlight software

Several profiles have been prepared and are available for download:

Profiles marked MSFS are compatible with both FS2020 and FS2024, where applicable

  • MSFS - Default - this uses the built-in MSFS radio settings and covers the default aircraft and the vast majority of addons
  • MSFS - PMDG 737
  • MSFS - PMDG 777 NEW
  • MSFS - FlyByWire A32NX
  • MSFS - iniBuilds A300-600R
  • MSFS - iniBuilds A310
  • MSFS - Blackbird Simulations MV310R (Milviz Cessna 310R) NEW
  • MSFS - MSFS - iFly Boeing 737 MAX NEW
  • MSFS - Fenix A319 / A320 / A321
  • MSFS - FlyByWire A32NX (A320 NEO)

  • X-Plane - Default - for most aircraft
  • X-Plane - Boeing 737-800X (Zibo Mod)

  • Prepar3D - Default

Can't see your favourite addon listed? - for most aircraft you can use the default profile, and if not, you can create your own

Full instructions are provided, and there is a great online support community should you need it

Functions may vary based on the aircraft and developer


What's Included
  • Circuit Avionics Radio Stack with Transponder - fully assembled
  • 2-metre USB cable
  • NEW: 90-degree USB adapter, allowing you to optionally route the cable neatly towards the back of your desk
  • Protective tote bag for carrying / storage
  • Stand comes attached - can be removed if required
  • Full instructions provided online
  • Support available should you need it!

Purchasing your Radio

The sale price may vary, depending on the option chosen, as fees and delivery options differ. Please check beforehand for the best price.

Option 1: Direct Purchase (preferred)

Worldwide shipping is available. All taxes, customs charges and fees are included in the price you pay.

If your country is not listed as a shipping destination, please contact me for a competitive rate.

COMBI PACK - Standard Edition

Category:
Autopilot, Radio + Transponder
SKU:
COMBI25-S
Price:
£556.14£598.00
{{variant.name}}:
{{opt.name}}
{{opt.value ? '' : opt.name}}
{{opt.value ? '' : opt.name}}
Description

This listing is for the COMBI PACK STANDARD EDITION which includes the Universal Autopilot and Radio + Transponder Panel (Standard Edition).

 

Read about the Universal Autopilot HERE.

Read about the Radio + Transponder HERE.

Option 2: 

Worldwide shipping is available. All customs charges and fees are included in the final price. The cost is calculated by eBay and I have no control over this.

This is a promotional link for which we may receive a small commission from eBay.

Option 3: 

Shipping is available to EU, USA, Canada. All customs charges and fees are included in the final price. The shipping cost is calculated by Amazon and I have no control over this.