If your power radio antenna won't go up and down anymore, the problem is either a burned-out motor or the geared cable inside the mast. Both are easy DIY fixes. First, make sure the motor works.
Blaupunkt introduced the first in-car FM radio in 1952 ... 1995 Jaguar XJS 4.0 Cabriolet elektrische Antenne - electric antenna In the early days, long metal antennas were the norm.