As others already pointed out, it's unlikely that the noise is caused by the tubes. I would try what Fon's recommended, but before this I would test different connections and remove ground. Take care, removing ground could be dangerous http://en.wikipedia.org/wiki/Ground_lift#Safety . _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
