Hi, all. I am finally making progress in terms of getting my new HF Predator screw-driver-type antenna installed onto my RV travel trailer. Hope to have it done by this week-end. ... My question is this: The person helping to install the antenna has already put Belden RG8X coax on the antenna. The coax run will be about 20 feet, going from the back of the trailer to the inside where I'll have my Icom 718 HF rig. We will have the coax running in a PVC conduit which will run along the frame of the trailer, and the coax will come up through a hole at an appropriate spot inside the trailer. Someone has suggested to me that I really ought to be using thicker coax for this purpose, in order to minimize loss. I do have a 100 foot chunk of RG8U coax with a foam dialectric that I could get the needed coax from, but don't want to go to all the trouble of re-doing the already-existing connections on the antenna if it really won't make much difference. The guy who installed the original coax on the antenna looked Belden RG8X up in the ARRL antenna book, and found that it has .7 DB loss per 100 foot on 10 mhz, so any loss for a 20-foot run would seem negligible to me. Am I ok here, or should I really consider the thicker RG8U stuff? I know there are likely to be a variety of opinions on this one, and I suppose I could always change coax runs later, but I want to try doing things right the first time if possible. Thanks as always for your very helpful advice. 73 from Tom Behler: KB8TYJ