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Dynon introduces smaller, lighter Mode-S transponder

By General Aviation News Staff · December 5, 2025 · Leave a Comment

Dynon has introduced the SV-XPNDR-263, a TSO Mode-S Transponder module with ADS-B-Out capability designed for use with the SkyView HDX and Advanced AF series avionics systems.

Based on the Trig TT23 compact transponder recently introduced by the Dynon Group, the SV-XPNDR-263 is both smaller and lighter than its predecessors.

The new SV-XPNDR-263 is a Class 1, Mode-S Transponder with 250 watts of nominal power output, providing essential functionality along with TIS traffic reception (US only) and full 1090 Extended Squitter (ES) ADS-B-Out capability, according to company officials.

When paired with a suitable GPS position source, such as the Dynon SV-GPS-2020, the SV-XPNDR-263 meets the FAA’s 2020 ADS-B Out mandates, Dynon officials added.

Features and improvements include:

  • The SV-XPNDR-263 module is 14% lighter and significantly smaller than its predecessors. Weighing in at 10.6 ounces and measuring 1.5 inches x 2.6 inches x 5.9 inches, the compact size allows for installation in the smallest spaces within the aircraft.
  • The SV-XPNDR-263 features the same mounting tray screw locations, quick-release mounting tray design, and electrical/antenna connections as previous models.
  • The SV-XPNDR-263 offers plug-n-play integration into SkyView HDX or Advanced AF systems via simple serial connection, with control and annunciation appearing directly on the pilot’s touchscreen displays.

Priced at $2,678, the SV-XPNDR-263 is now available for experimental SkyView HDX systems.

For more information: Dynon.com

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