For a good brief discussion on SWR and misconceptions, see http://www.cebik.com/a10/ant17.html As for your assumption about SWR, it isn't as easy as figuring the power ratios. It really doesn't take a ton of reflected power to increase your SWR, and there are a lot of reactive components which, along with your transmission line, affect SWR. The formula to figure SWR is: S = 1+the square root of (r/f) divided by the quantity 1 minus the quantity square root(r/f) where S is SWR, R is reflected power and F is forward power. If you actually had 50 Watts reflected power with 100 Watts forward power, that would result in an swr of 39.9:1. r=50 f=100 r/f = .5 square root of .5 = .7071. 1+.7071 = 1.7071; 1 minus .7071 = .2929 1.7071/.2929 = 39.9:1. Steve, K8SP Lansing, MI