Could Akron or Macon have carried radar for early warning or scouting during the Second World War?
Short answerYes, with continued technical development and sacrifices elsewhere in the airship's equipment and payload.
NotesRadar conversion would be a weight-and-power trade-off rather than a simple bolt-on. More capable engines and improved lift would increase the available margin. Existing equipment, including the lowered observation car, could be removed to make room. The result would be a specialized scouting platform. Its usefulness would still depend on Akron or Macon surviving long enough to receive the modernization.