It seems to be a popular thing to condemn every switcher as noisy. Whenever I
purchase something that comes with a wall wart, I check it out with my radio on
all bands. Most pass.
What is more, if we willy nilly replace the dreaded switchers with the linear,
we could actually cause problems where one did not exist.
Being built to be cheap, the linears I have seen have a transformer, a full
wave rectifier, and a filter cap. My experience with Linear wall warts echos
this http://www.dxing.info/equipment/wall_warts_bryant.dx
If an Op wants to have no switchers, and if they want clean power. make a power
distribution system with a well regulated, properly filtered power supply, and
not allow a wall wart to be seen in their house.
But really, check out that switcher before trashing it. You aren’t gaining a
lot by going to a cheap linear wart, and might introduce problems.
- Michael Coslo -
Frequency Coordinator, Beaver Stadium
814-404-3991
mjc5@psu.edu
mjcn3li@gmail.com
> On Nov 28, 2018, at 11:14 PM, Roger (K8RI) <k8ri@rogerhalstead.com> wrote:
>
> One thing to keep in mind and this list seems to ignore. Not all switching
> supplies generate noise although many, if not most do.
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