Topband: Desktop Power Supply Brand/Noise Question

[Jim Brown]

On 7/20/2013 7:27 AM, Clay Melhorn wrote:
> Looking at another "good deal" how do the COOLER MASTER PS's rate for RFC filteringor are there others brand I should be looking at?

For about ten years, my computers have been T4x-series Thinkpads, and 
they have been pretty RF-quiet. Before that, I used the premium PC Power 
and Cooling power supplies for my computers, and found them RF-quiet. 
But that was ten years ago, and things can change.

Depending on how the beast you bought is built, you MAY be able to cool 
it off by winding turns of the power cord through a #31 toroid, and by 
doing the same with other cables that leave the box. Or maybe not.

Note that the link you posted says almost nothing about EMC -- the only 
thing is under "compliance," where several safety and EMC standards are 
cited, with the condition "passive models."  My guess is that is a broad 
as a barndoor spec that does NOT apply to the $40 unit. :)

73, Jim K9YC

73, Jim K9YC