Hello everyone. First post in the Ham section, but I got a problem I need some input on. I am looking for a telescopic antenna mast, much like Radioshack used to sell. I believe something similar is the Rohn H40, or Channel Master. (who originally made them) 35ft range Here is the kicker. I want to put this thing on a 4x4 trailer and I don't want to have any guy wires coming off it. I emailed a company that deals in towers and masts and such and he said no way. Even if I had guy wires from the top to the corners of the trailer, they wouldn't be far enough away to do anything. I have looked at self supporting towers, but they require a square yard of footing, and I don't want a 4,000 lb trailer for a 30 foot mast. So, questions 1. Any suggestions for a mast in the 30-40 foot range that can self support? The load on the top is a tiny omni, basicaly a piece of PVC 2. What is the formula for the spacing of guy wires if I decide to use them? I was thinking about having 'outriggers' coming off my trailer to have a better angle on the guy wires, how far out can I go? 3. Does anyone make custom masts? Texas Tower sells tube aluminum, which is AWESOME but the prices are a bit high, and aluminum isn't going to support these lengths. I have also looked at fiberglass, the jackite poles, but they don't get that tall. Amusingly enough, there is a company called constructioncam that is doing something very similar to what I want. They have a trailer with a freestanding mast. I have see it close up. It is 30 something feet high, and is made out of some sort of box metal, around 6 inches at the base. It almost looks like channel steel, the kind that you use on high ceilings to support pipe and such. It is the right idea for what I want.