im thinking about changing out my wilson 5000 baseload..i use to use toplad antennas way back in day.. for a centerload i had a monkeymade mm9 . it worked good but filled up with water.If I remember right its 88 inches. The 17 inch is around 78 in. The 9 is around 76 in. I am using LMR400UF Coax, 2 lengths 15ftish each as I can't remember exactly as I used the velocity factor calculator for Channel 20.