I don't know have any evidence to corroborate the actual raid, but a German raid to capture cathode ray tubes in 1943 does make some sense.
The Germans of course used cathode ray tubes, which they called Braun tubes, but they lacked cathode ray tubes with long persistent phosphors suitable for PPI display. Long persistent phosphors will cause the image on a PPI (plan position indicator) last for several seconds after the sweep has passed. The Germans had PPI radars also of course, but in many cases the lack of long persistent CRTs made applying PPI to a Seetakt, for example, at sea impracticable. The practical continuous rotational speed of the rangefinder apparatus on a large German warship, which Seetakt was often mounted, was about 1 full rotation every 70 seconds. The Germans would know that the rotational speed of the Ventor radar was about 2 RPM, so would have by necessity a very long persistent CRT. CRTs of recovered H2S and H2X sets still required a rotational speed of 60 rpm.
As it was the Berlin PPI radar, mounted on warships by mid 1944, rotated at speed of about 400 RPM so that a continuous image would be displayed, without using long persistent CRTs, which were in short supply among the Germans.
Entering a night sea battle is an awesome business.The enveloping darkness, hiding the enemy's.. seems a living thing, malignant and oppressive.Swishing water at the bow and stern mark an inexorable advance toward an unknown destiny.