[jerryhawthorne]

Johnny, I would guess you had an e-cap that is heading South. If the transformer is not heating under no load I would not immediately suspect it. The vibration may be due to some loose screws on the laminations or perhaps mounting to the chassis. Perhaps a fiber washer under the mounting screws to dampen? I know Scott used some rubber tape of some type to isolate the transformer they used for powering up the 800B. It was running even when the radio was turned off. Gave off a little vibration noise if not isolated. But what do I know?
Jerry
Jerry