I just in stalled a super clean Digi Scan 400 in my Uniden Washington with the 8719 PLL and aligned the radio according to proper procedure from instructions. My problem is this.....when the radio is keyed it transmits fine but after a few seconds of holding down the key it starts motor boating and buzzing badly and the TX/RX led flashes back and forth with the buzzing. The radio was in excellent operating condition prior to the conversion. Any ideas?