The KT-71 operates just like the KT-70 transponder, but does not offer Mode S capability. The KT-71 is a Mode A / Mode C transponder.

With 250 watts of transmission power, the solid state KT-71 offers long range and operation at any altitude. The KT-71 can replace a KT-76A / KT-78A with minor installation modifications.

The KT-71 features:

• Mode C compatibility
• Self-dimming gas discharge display
• Displays the ATCRBS code and encoded altitude transmitted
• Push button selection of VFR code (1200)
• 250 watts of power
• Supports a remote ident button
• System self-test function
• TSO'd

If you are upgrading from a KT-76A to a KT-71, these are the needed steps:

• Remove the dropping resistor if a 28 V installation. The KT-76A needed this, but the KT-71 does not.
• Add another power supply connection to pin 12. (This is recommended, but not required.) This provides more power to the KT-71.
• Upgrade the fuse from 3 A to 5 A. (The KT-71 can use more current.)
• Remove the RFI Suppression Adapter (if installed).

You may also be interested in an Encoder to use with this KT-71. When installed with an Encoder, the KT-71 will report both your position and altitude to ATC (Mode C).

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