Hey all, I've been having intermittent ground noise on my beloved IP-777 preamp... At first I thought a tube had gone microphonic on me but I tracked it down to an intermittent connection on the primary of the internal power supply transformer (not the wall wart). The numbers stamped on the frame are 177-8308 and 225641. For the life of me I can't track this part down on Google or any of the electronic distributors I commonly use. Anyone got any insight? A schematic/BOM would be great but from the threads I've seen it seems like any documentation on this gem has gone the way of the Dead Sea Scrolls.... Any help or ideas would be much appreciated. Thx!