Guess that Part! (mystery part #2 is up)

It is a copper wrapped ferrite choke, the arrow probably denotes the negative terminal. Wiki calls them inductors.

A variety of types of ferrite core inductors and transformers

" Inductors are widely used in alternating current (AC) electronic equipment, particularly in radio equipment. They are used to block the flow of AC current while allowing DC to pass; inductors designed for this purpose are called chokes. They are also used in electronic filters to separate signals of different frequencies, and in combination with capacitors to make tuned circuits, used to tune radio and TV receivers."



Inductor - Wikipedia, the free encyclopedia