[Heath] Off Topic Switching Power Supply

[Larry Sheldon]

On 11/1/2015 22:11, Ron 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?

Square waves.


-- 
sed quis custodiet ipsos custodes? (Juvenal)