Use this cable to connect the ExtCtrl connector of the a SunSDR QRP/PRO/DX or MB1 transceiver to a SPE Expert power amplifier. With this cable, the transceiver can switch bands and switch external PA to TX mode.
It is compatible with MB1, SunSDR2 DX, SunSDR2 PRO and SunSDR2 QRP together with SPE Expert 1K-FA, 1.3K-FA, 1.5K-FA and 2K-FA.