|
Post by MartinT on Mar 16, 2024 20:49:41 GMT
If the filters clean the incoming supply is there any "dirt" to be rejected? Just answering this bit, no filter is perfect. Ergo, you are never completely rid of mains noise. When that noise hits the power supply of your hi-fi component, it is subject to PSRR (Power Supply Rejection Ratio), which can never be 100%. So some noise ends up getting through. If the component is analogue, the effects may not be too great (big generalisation). If it's a DAC, the core of any digital system, the noise can still be ruinous. There is also the question of what frequency the noise is centred around. High GigaHertz noise can inflict more damage since it penetrates more easily (again, big generalisation). The prevalence of wi-fi, mobile data, DAB, TV and satellite broadcasts, gadgets and microwave ovens are not helpful and create a whole fog of airborne noise little of which was around in the 1970s.
|
|
|
Post by MikeMusic on Mar 16, 2024 20:51:57 GMT
Assumed mini fluorescents would be noisy which is why I swapped to LED Not compared to incandescent
|
|
|
Post by MartinT on Mar 16, 2024 20:53:16 GMT
Both CFCs and LEDs are bloody noisy, especially if dimmable.
|
|