[Elecraft] K3 - Intermittent Loss of RF Output

[J.A. Wolf, MD, K6JW]

   I recently completed a K3 kit. All is well except that occasionally and unpredictably, RF output drops to zero. This can happen whether I'm operating barefoot, driving my Alpha, when simplex, or when split. If simplex, then going to split and back to simplex will often result in restoration of RF output, and vice versa, i.e., when split, going back to simplex and then split again will often help. Cycling the radio's power on and off will resolve the problem sometimes, too. This behavior is NOT seen with my other HF radios on the same amplifier and antenna system, so it must be something in the K3. Has anyone seen this problem and, if so, resolved it? Does anyone have any suggestions before I might have to ask the guys at Elecraft to look at it? Thanks in advance for any help.
73,
Jeff, K6JW