wylton
Naim and Mana member
One of my Avondale TPX1 psu's had started to whistle. I've ignored it for a while, but this morning I decided to take a look. I had found previously, that moving it or jamming something between the chassis & the case quietened it, but it got to the point where I couldn't stop the high frequency whistle. This is mechanical noise, btw, not being transmitted through the hi-fi. So, I unplugged it & took it up to the workshop, plugged it in & it's whisper quiet. I have spare transformers & was planning to change it, if it had gone noisy, but this appears not to be the case.
In the listening room the mains comes from a dedicated supply, so I would expect it to be reasonably clean. I wonder if this is emc related? In the rack, it sits next to a linear supply for the Auralic mini. Another TPX 1 that supplies the Naim pre-fix, mounted on an adjacent rack, has no such issues. It's driving me nuts!
In the listening room the mains comes from a dedicated supply, so I would expect it to be reasonably clean. I wonder if this is emc related? In the rack, it sits next to a linear supply for the Auralic mini. Another TPX 1 that supplies the Naim pre-fix, mounted on an adjacent rack, has no such issues. It's driving me nuts!