[Elecraft] Switching power supplies...yet another comment

[Jim Brown]

On Sat, 17 Jul 2010 12:47:44 -0400, John Ragle wrote:

>But...my overall 
>opinion is that switching power supplies have taken a bad rap.

There are switching power supplies and there are switching power 
supplies. Not all are created equal. If you go to an electrical 
supply store to buy a transformer to run 12V lighting, they will 
sell you a switching power supply that is a holy terror. They call 
it an electronic transformer. Ask them for a real transformer and 
you get a blank stare. 

Most wall warts that provide DC power for battery charging, or to 
run consumer electronics of all sorts are switching power supplies. 
Many of them are quite noisy. 

73, Jim Brown K9YC