What if the German navy and merchant marine were more interested in Huelsmeyer's device, allowing for a directional and ranging device for naval forces by 1914? Historically the technology was rediscovered by independent research in the 1930's in Germany, which was not aware of the patent from 1904. When the inventors tried to patent the device the patent clerks stunned the scientists by presenting them with a patent for a nearly exact device from over 30 years prior. OTL German radar went from principle to usable device in 4 years IIRC; here lets say that a similar project with decent funding goes from a device without ranging capabilities in 1904 to usable naval weapon in 6-8 years. This means the German navy would have radar by the time 1914 rolls around.
What then happens? Do the British manage to produce something similar if the Germans are clandestinely working on it? They had Huelsmeyer's patent on file and British researchers wrote about it at the time, but abandoned it too. Are then the Germans able to fight a naval battle at greater range than the Brits, allowing them to inflict disproportionate damage? A German victory at Jutland???