I was watching old WWII youtube videos and was wondering how did German U boats 1000s of miles away talk to Germany?
This is very interesting. I would love to see detailed circuit drawings of the Transmitter & receiver with part values & numbers?
I wonder if transmitter was powered by the engine battery bank?
I wonder if the long wire I see in U boat pictures is the antenna?
I was dreaming about this in my sleep last night wondering how they transmitter round earth radius? A 1000KW transmitter is a lot of power.
Online picture shows transmitter powered by 3 90v batteries that is not 1000KW.