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According to the TM, when in use the CX-4722 (antenna tuning cable) does plug into the Amp and is controlled automatically by it. The antenna tuning control on the AM-2060 at this point is superfluous though you still need the CX-4655 tying the AM-2060 to the PRC-25/77 to provide the radio power.Also the antenna matching unit will be controlled by the base unit, not the amp.