Hi there! I have a dbx 386 dual channel tube preamp. It was out of service for some time and when I recently put it back in the rack only a couple of LEDs turn on. On inspection it seems that the larger of the two transformers supplying power to the PCB has transformed into a Gandalf No-Pass Filter ("None shall pass!"), i.e. voltage in to the transformer is good, voltage out is 0. After much searching I cannot find a reference for this part and what its output voltage is supposed to be. The transformer is printed "Ault Inc. 26-0290A 687-3510G", but my google-fu turns up next to nothing on this, except this excellent thread in this forum. Does anyone know what voltage this is supposed to output, or anyone who owns this product be willing to measure the output voltage of the larger transformer? Thanks for any help you can give.