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Driving relay with TX1-TX3

I would like to use TX1 to operate a relay that will be used to switch an antenna. Will I need to put a clamping diode across the coil and what is the maximum current that TX1-TX3 will sink?


  • K0FLY
    K0FLY Member ✭✭✭

    I would use a clamp diode across the relay coil.

    From page 26 of the "Hardware Reference Manual": The TX Relay outputs are designed to handle signaling levels of up to +40 VDC @ 140 mA maximum.

    Gayle K0FLY

  • normancyyj
    normancyyj Member ✭✭
    Thanks for your response. I intend to switch in different antennas for transmit on different bands when operating remotely on antenna 2

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