I bought this Astron Switcher new, about 13 months ago. It worked OK for 11 months. It started spewing hash and buzzes. Had a month left on warranty, so I sent it back. When it arrived back, it seemed to be fine, but just started doing it again. The tech notes said he replaced two capacitors. I sent it back again, this time thay replaced the whole board. Soon as I turned it on, I had S7 buzz/hash. It's out of warranty now. I sent an email this morning describing my issue. I have no idea how they'll respond this time. Nothing special here. Just running my TS-590, FT-991A and my President McKinley and RM Amp. Antennas are resonate dipoles. Presently, I'm using my Alinco DM-430T 30 Amp switcher. This has been a most excellent PS. The only odd thing I've noticed at times with the Astron, is while I have one radio powered, the hash/buzz increases when I turn another radio on. Before the Astron went poop the first time, I would notice that when I keyed up any Amp with my CB's, it would make like a little electronic fart noise in the receiver when I unkeyed. I initially thought it had something to do with my amp. When I used any other PS, I didn't have the fart. I can't think of anything else in my shack that would cause this problem. I suppose that the new board could be bad. Like mentioned, it was a nice supply for the first 11 months. Any thoughts?