[Elecraft] Local Noise Problem

[Jim McCook]

Jim,

Thanks for those suggestions!  It never occurred to me to decouple the 
transformers from the AC line.  In other words, disconnect the antenna 
from the monster.  I'm told that many of these little switchers have 
toroids or little transformers in them that are pretty effective with 
noise supression, and therefore able to get Type Acceptance.  However, 
when they are manufactured in China or Indonesia, etc., they get 
creative in order to save cost.  They can still claim Type Acceptance.  
Elimination of the toroid winding or small transformer and replacement 
with plain wire is the answer, so now we have a noise generator.  AD6ZJ 
deals directly with some of these devices and explained this to some of 
us this morning.  He also mentioned that the frequency of many of these 
switchers has become progressively higher than before, some being up in 
the 3 MHz region!

I'll check out your site for suggestions.  My preference would be to 
purchase something that the electrician can install, since putting some 
sort of homemade device would probably not be acceptable to the 
electrician or the consumer.  It also is a matter of my own 
responsibility.  I'm open to any suggestions.  You may have the answer 
to the problem!

73, Jim
W6YA