Terra's TRT-250 transponder has an all solid-state design that eliminates the need for a cavity tube. As a result, reliability is improved, and no warm-up time is needed before operation. This unit is small, lightweight, and has low power drain. Please note that the factory no longer supports pushbutton Terra models. The initial price is lower than the gas-discharge TRT-250D, but it can be challenging to obtain service. Other TRT-250 features include:
- Mode C compatibility
- Backlighted push-button switches
- 200 watts nominal power output
- 4096 discrete codes
- System test capability
You may also be interested in an Encoder to use with this TRT-250. When installed with an Encoder, the TRT-250 will report both your position and altitude to ATC (Mode C).