OK, Iron... right at the end of their usage, a few H models had a ranging radar.
However, during the time they were most heavily used, H's did not have a ranging radar.
Found an intersting bit on it, too.
B-25H PageThe B-25H carried the extraordinarily potent armament of fourteen 0.50 inch machine guns and a 75-mm cannon, and could also carry up to 3200 pounds of bombs or a 2000-pound torpedo.
The cannon carried by the B-25H was bore-sighted at 1000 yards and was generally fired at altitudes from 1000 feet at the beginning an attack to 500 feet at the end. The sighting was done with the N-6A sight, and the guns were fired by the pilot, there being no bombardier or copilot aboard.
During an attack, cannon fire was usually opened at 2000 yards, with an average of three rounds being fired by the time the aircraft closed to 1000 yards.
Combat sorties confirmed that the cannon-armed B-25H offered no particular advantage over specially-adapted strafers armed exclusively with machine guns.At this stage in the war, targets specifically suited for cannon attack were relatively few and far between, and many targets that were vulnerable to the cannon were also vulnerable to a battery of 0.50-inch machine guns or to bombs.
Consequently, the use of the heavy cannon was generally abandoned in the South-West Pacific by August of 1944. In September, the B-25Hs were either passed along to the 38th Bombardment Group (which was already operating B-25Gs) or returned to depots. Unlike most other groups, the 38th Bombardment Group actually welcomed the H model.
24 B-25Hs were taken on strength by the 11th Bombardment Squadron, 341st Bomb Group, of the Fourteenth Air Force for interdiction work in China in early 1944. They were first employed on river sweeps.
In November the 11th Squadron received a few examples of the new APG-13A radar ranging equipment for use with the 75-mm cannon.This enabled the precise range to a target to be determined at all times during an attacking run, making precise aiming much simpler.
This equipment was operated by the navigator, and was installed in B-25Hs 43-4584, 4071, 4924, 4989, and 4601. ******
Glad you mentioned it. I learn something new every day!