Yaesu SCU-66 separation cables Designed to reliably connect the FTX-1 control unit to the SPA-1 RF amplifier. These cables allow for spatial separation of the units, offering maximum flexibility for your station setup. They are ideal for fixed or mobile amateur radio installations where the SPA-1 unit needs to be positioned away from its FTX-1 base. This way, you can optimize your space, placing the amplifier, for example, in the car trunk or away from or under your home desk, without compromising the connection.