Has anyone else put an AN/ARC-2 on the air? On key-down, the PTO drifts about a KC. Before I take the cover off this gorilla of a radio and wrestle it to the ground, was wondering if this is common to the ARC-2 or if I need to look for a bad cap on the 250 VDC buss dragging it down on PTT. 73 DE Dave AB5S