I think you are referring to one of these KING Antennas... These only go left or right and does not crank up...
The other comments on here was referring to the standard crank up models that look like this. You can either use a KING JACK antenna or a BATWING mounted on the two bars on the roof that rotates left and right and raises up and down...
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I use the BATWING antenna with the front mounted dipoles on my OFF-ROAD Camper setup...
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Roy Ken