My guess is the KPA3 board pins are not making contact. You need to check to see if the pins are gold and not silver. If they are silver, that could be the problem. -- View this message in context: http://elecraft.365791.n2.nabble.com/low-output-after-air-travel-tp6066041p6075931.html Sent from the Elecraft mailing list archive at Nabble.com.