You get static build up from any friction, wind, sandstorm, etc. The resistor will discharge the build up. The one watt suggested is fine and more durable than 1/2 watt resistors, unless you use flexible braid for leads. A wind storm took out the 1/2 watt resistor we had on the club G5RV across the center insulator. But, it is nice to have a discharge resistor when the wind gets going. 73, Stuart K5KVH