This is a difficult question to answer. WSHU does not make any adjustments to our transmitting equipment during a pledge drive. Weather phenomenon may make a station's signal stronger or weaker than usual in a given area, but these effects last only a few hours to a few days. We do state our call sign and location more frequently during a drive, so we are more noticeable. I once received a call from a listener in Philadelphia who heard the signal from our 250 watt Selden translator during a pledge drive.
Radio waves do strange things from time to time.
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