Valve radio aerials in India (Techniek Overig)

door jsbhavsar , Mumbai, India, 21.10.2016, 07:53 (2781 dagen geleden) @ Maurice

Is the spring antenna specific to some band (FM, LW) on the back panel of radio?
On the rear panel I can see a separate socket on the left bottom for the long wire aerial input. So question arises why these springs?

If aerial socket is there, what was the duty of this spring? Did it act as counterpoise for the long wire?