YES well done GE
I thought you'd given up & gone to bed!
It is a loading coil that provides inductance to bring the aerial to resonance.
At the time a transmitter's frequency was determined by the length of the aerial itself. On a shore station you could more or less have whatever length of aerial you like.
On a ship (HMS Yarmouth) there was a limit to how long or convoluted your aerial was. Hence the need for the coil on the longest wavelength.
Still not got a date:whistle:
The WT equipment is a Type 36 operating on 1,100 metres, 2,600 metres & 4,000 metres. The 'thing' was only needed on the last band.
It was not needed by a shore station. Think about the problems of operating on ship & why the 'thing' was needed.
It's connected to both
Yes it is do with long wave ship communications.
It's been established its not WW1 or WW2, but nobody has got the right era yet.
You've done quite well
Well at least you're still there Tony, I think everyone has assumed it's all over. But there is an interesting story to this 'thing'.
Anyway it's not WW2. You are correct there is a lot of heat from the coil. But it's not microwaves, when consider the obvious inductance of that coil.
Tom as far as the fog lights go, trace back from:
Both fog lights & warning light are Red/Brown
where they join they are fed by Red
go to fog switch
which is fed by Blue/Red
going to C2 on fog relay
C1 is Blue/Red & joins with Blue/Red of LH & RH Dip headlight filaments
W1 Blue/Orange goes to IR switch
W2 is Earth (Obviously W=Windings C=Contacts)