When it comes to chassis ground, house ground, signal ground, star ground, earth rail etc. Which of these should be directly connected, and which "indirectly" via caps etc :thinking:. Also, should RCA jacks be isolated from the chassis routinely? Trying to sort out a "humm" on one channel of a valve phono amp. It is only noticeable between songs but still quite annoying :headbanger: Any advice appreciated
