Many thanks Seadart, Jetro, pkr and others,
the white box just buzzes as soon as i connect the aerial withou
t the motor to the board, it also buzzes when the motor is connected to the board, as im sure you can understand i know very little actually lets be honest! i know nothing about electronics.
So, yes i was listening to the radio when the fuse blew, but the buzz is not the motor attempting to push or pull the aerial as no power appears to be going to the electrical motor, so in my total ignorance i am guessing the white box/relay/ switch is jammed? There is one other thing on the board! pictured below, it looks like an inline fuse? In the first picture you can also see the two pin connection where the electric motor connects to the board.
The 2nd pic is a close up of the inline fuse, i think?
And the third picture is the other side of the circuit board and the inline fuse is connected at top right and moving left on same line other solder point is 2nd left of this line, the electric motor connection is the two connections middle right just parallel with the first of the three contacts to that copper wheel if that makes sense?
Hopefully, the pics will explain.