I've just noticed that the SWR of my CushCraft A3S, with 40M addition, has gone above 3:1 on 20M and 40M. 10M and 15M SWR is low. I'm thinking one or more of the traps have developed a problem. Can someone recommend a procedure to diagnose the problem. The antenna is on a crank over tower so getting to the traps is not a major problem. Julio, W4HY