Sandia STX 165R Remote Transponder – Certified

$1,875.00$1,975.00 (-5%)


Sandia Aerospace STX-165R Remote Mode C Transponder is a remote unit that is controlled by existing aircraft navigation units.

Sandia STX 165R is a remote Mode C transponder that weighs only 1.16lbs and requires a mere 200mA current at 28Vdc. It can be fully controlled by aircraft navigators with the capability. This transponder will work with MGL, GRT, DYNON Avionics, and Advance Flight. It is also ideally suited for use in UAVs where weight and current are primary concerns.

Estimated delivery: May 27th - May 30th
Part Number: 705831-00 Category:

The STX-165R accepts either Gilham Gray Code or RS-232 altitude input for Mode C operation and can be mounted vertically or horizontally with or without a mounting tray.

  • Simplified installation with a built-in encoder
  • ADS-B Compatible with UAT 978 systems
  • Three function timer includes elapsed time, up timer, and down timer
  • Compatible with STP 78 OAT probe (sold separately)
  • Compact and lightweight weighs only 1.3 lb
  • Ideal for LSA, glider, and UAV operations with a low current requirement
  • DO160F, DO 178B level C, TSO C74d, TSO D88b (encoder) certified

Additional information

Weight1.16 lbs
Dimensions3 × 1.8 × 6.9 in

DO160F, DO 178B level C, TSO C74d

Input Voltage:

11 – 33 VDC

Current requirements

360 mA @ 14 VDC
180 mA @ 28 VDC

Power Output

200 watts, nominal

Transmitter Frequency

1,090 KHz

Receiver Frequency

1,030 MHz


Grey Code


-20°C to 55°C


-1,000 to 35,000 ft


Sandia STX 165R Remote Transponder - Certified

Sandia STX 165R Remote Transponder - Certified

$1,875.00$1,975.00 (-5%)

Add to Cart