The assembled antenna looks like, e.g, the A148-20T since it has an 11 foot boom. However, the element spacing is 14" and the vertical and horizontal elements have the "vert." measurements of the A147-20T (40" refl, 37-7/8" driven, and so on to the end director of 35 1/8". What model is it? I suppose I should leave well enough alone since it tunes well at 10 ft off the ground with the MFJ-247C.