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

Updated for 2024!

I am delighted to announce version R25 of the Circuit Avionics Radio Panel

Get in touch via email or Discord if you have questions

Purchase Options are further down the page

Standard / Premium Edition

Production costs have unfortunately rocketed and we are all feeling the squeeze.

To help mitigate this, I created two editions for the Radio.

The only difference is the aesthetic look of the control knobs, including the Transponder / TCAS knob. The underlying construction, electronics and functions remain identical.

  • Premium Edition: for pilots who want to more closely replicate the look of a Boeing aircraft.

    • Custom-design, made to order knobs using SLS technology. The TCAS / Transponder is based on that of the Boeing 737.

  • Standard Edition: off-the-shelf knobs intended to keep the cost down as far as possible.

    • Black-and-white rotary knobs. Guitar-style knob for the Transponder / TCAS control.

Premium Edition

Standard Edition

Product Video

Video shows early model (R23)

There is one functional difference: illuminated buttons replace the system selector switch.

Other changes include new buttons, new knobs (standard / premium options available), and other small details.

Quality Construction

  • 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

Dual-Mode Operation

  • Buttons selectors for System 1 or 2 (COM1/NAV1/ADF1 or COM2/NAV2/ADF2)

  • The selected system is illuminated

  • ACTIVE and STANDBY frequencies on each radio, with TFR (transfer) button to swap frequencies

Online or Offline Flight

  • Perfect for VATSIM, IVAO and PilotEdge

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

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

Radio Features

VHF (COM1/2)

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

  • 6-digit display for 25kHz or modern 8.33kHz channel spacing (aircraft specific)

  • Pick up your ATIS on COM2, or use it as a transmit frequency

NAV 1/2

  • Morse code ID selector for each receiver, illuminated when active

ADF 1/2

  • Morse code ID selector for each receiver, illuminated when active

  • Supports decimal frequencies (can be configured as required)

  • ADF2 is optional (disabled with a tick-box in the software)

Transponder / TCAS Features

  • IDENT button (illuminates 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.

Expandable Function

Rotary knobs also have a push function. Pushing the NAV knobs adjusts the brightness of the displays.

Push function of the other knobs is unassigned.

Assign to ANY function of the simulator or aircraft

Sugggestions:

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

Function varies by aircraft and developer

Dimensions

Overall dimensions:

  • Height: 22cm - Width: 16cm - Depth: 13cm (6cm excluding the base stand)

Rear case dimensions for pedestal cutout:

  • Height:21cm - Width: 15.6cm - Depth: 3.2cm

Additional Information

Adjustable display brightness - push NAV knobs or adjust the default level easily in software

2-metre USB cable included

Protective bag included

Support available should you need it!

Simulator Compatibility

  • Microsoft Flight Simulator (MSFS 2020) on PC

  • Prepar3d versions 3+

  • Flight Simulator X

  • Flight Simulator 2004

  • X-Plane versions 9-12

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

  • FSX and Prepar3D users require FSUIPC (free version)

Ready-Made Profiles

The panel is controlled by Profiles which are loaded into the MobiFlight software

Several profiles are already available:

  • MSFS - Default Aircraft - this uses the built-in MSFS radio settings and covers all the default aircraft plus many addons

  • MSFS - PMDG 737

  • MSFS - PMDG 777 - new

  • MSFS - FlyByWire A32NX

  • MSFS - iniBuilds A310

  • MSFS - Fenix A320

  • X-Plane - Default

  • X-Plane - Boeing 737-800X (Zibo Mod)

  • Prepar3D - Default Aircraft - this uses the built-in Laminar radio settings and covers all the default aircraft plus many addons

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 online, and there is a great online support community should you need it

Radio function varies by aircraft and developer. See You Have Control for more information.

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:
£578.00£678.00
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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.

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.