[Heath] Off Topic Switching Power Supply

[Neil Morrison]

> Questions: what is the difference between a regular power supply and a
switching power supply?

Basically, frequency. They use a much higher frequency, and they chop the
DC to that. Didi you check Wikipedia?

> Can I filter out the noise on a switching power supply?

Yes, but you may need to use chokes, like clip on ferrites, and capacitors
- and maybe a metal cage.



Neil
-----

On Sun, Nov 1, 2015 at 8:11 PM, Ron <kd6edv at gmail.com> wrote:

> I built an 18vdc 1.5 amp power supply using a transformer, bridge
> rectifier and a 7818 regulator. Works fine, but I need to go to 3 amps. I
> have been trying laptop switching power supplies that put out 3 amps that
> produce noise on my hf rig. If I unplug the laptop power supply, the noise
> goes away. The power supply is used for charging batteries through a solar
> charger.
>
> Questions: what is the difference between a regular power supply and a
> switching power supply? Can I filter out the noise on a switching power
> supply?
>
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