2.
http://www.subsim.com/radioroom/show...ighlight=tails
it's a little bit of reading, but in there you'll find what you are looking for, sorry but I dont know exactly where it is.
3. I think its called the RDF antenna. A radio antenna. It's always there and turning. I dont think there is anything to do about it.
I could only help with 2 of your questions.
edit: firewall found question 2