Well since the little scrotes ruined my orginal aerial I have had to fit a different type that has no removable parts.
Problems with my shark fin started when the connectors fitted by Vauxhall turned out to be anything but the standard type you'd expect.
I wish at this point I had of rewired the whole thing, but in stead I cut the standard plug off and wired up the non standard vauxhall plug.
The reception is rubbish to say the least, I have re wired the plug to the point where I took out all the orginal wires and put the shark fin wires in to it.
I can only assume the amplifier is either knackered or not getting enough power, the power wire was running at 10.75 V not 12 (but earthing the volt meter was not easy or ideal).
All becuase Vauxhall did not use a standard plug fitting
Does any one else have any experiance?