German WWII U boat transmitters Low Hz 1000KW

[gary350]

I was watching old WWII youtube videos and was wondering how did German U boats 1000s of miles away talk to Germany?

Goliath transmitter - Wikipedia

en.wikipedia.org

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.

 

[MaxHeadRoom78]

Also read up on (British) Rugby radio very low frequency transmission, supposedly could be received up to one fathom under sea anywhere in the world!
Max.

 

[Nigel Goodwin]

I was watching old WWII youtube videos and was wondering how did German U boats 1000s of miles away talk to Germany?

Goliath transmitter - Wikipedia

en.wikipedia.org

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.

Perhaps you should ty reading the article? - the 1000KW was the land based transmitter.

 

[MaxHeadRoom78]

last night wondering how they transmitter round earth radius?

VERY low frequency usually required.
Now HF is bounced off Ionosphere layer.
Max.

 

[unclejed613]

A 1000KW transmitter is a lot of power.

i think you are confusing the land based transmitter and the radio sets in the U-boats.. the two radios shown in your post are army field radios. here's what the radio room of a u-boat looked like:

notice all the equipment is bolted down or bolted to the wall, and this picture must have been taken early in the war because the Enigma machine only has 3 rotors...
all of the transmitters used in u-boats were 200w or less:

VLF propagates differently, with the space between the surface of the earth and the ionosphere acting somewhat like a waveguide.

 

[gary350]

I see.

Land base VLF transmitter was 1MW. U boat receiver was VLF.

U boat transmitter 3-30MHz 200W. Is this why I see a whip antenna on some U boat conning tower pictures.