Hi all - I'm a relative novice around here, so forgive me if this is stupid, or convoluted, or whatever. Over the last few years I've been assembling a system mostly made up of pieces made by a local builder (45 amp, 01a preamp, Cg3-based phono stage). It sounds fantastic on the Tannoys, but some of the transformers are really buzzing. I read around a bit, ending up buying a Humdinger DC line blocker from Audio Van Alstine that made a slight improvement, but not as much as I was hoping for. This is in addition to a passive power conditioner by Running Springs Audio (the "Elgar").
Recently bought an old PS Audio P500 and... the hum vanished. I was able to buy it cheap because it maxed out at 150W -- I was warned by the seller -- and sure enough, after a couple days, it blew out the fuses on my equipment and shut itself down for good. (My system, it turns out, was drawing a bit less 200W total).
PS Audio is willing to rebuild it for $700 plus whatever shipping ends up costing, let's say another $150 or so. Here's my question: is there a better way to spend that money to eliminate, or at least really reduce, the transformer hum? Like, three Humdingers in series? Or whatever?
Thanks for any guidance.