[Elecraft] k3 switching supply

[Milverton M. Swire via Elecraft]

Jim, are you not contradicting yourself? 
>>> " and there 
ain't no such thing as a "ground loop." <<< 

>> What there IS is a difference in 
potential between the chassis of one device and the other. << 
Isn't your stated wording almost the exact wording used by many, including Wikipedia as a " Ground Loop" 
I'm a bit confused. 

((((73)))) Milverton / W9MMS. 


      From: Jim Brown <jim at audiosystemsgroup.com>
 To: elecraft at mailman.qth.net 
 Sent: Thursday, June 18, 2015 1:38 PM
 Subject: Re: [Elecraft] k3 switching supply
   
On Wed,6/17/2015 4:55 AM, Marc Veeneman wrote:
> When I connected station ground to the power supply that went away, I think it was a ground loop.

Wrong word, correct solution.  The correct word is "bonding," and there 
ain't no such thing as a "ground loop." What there IS is a difference in 
potential between the chassis of one device and the other. When you bond 
chassis to chassis, you reduce that difference to a small value.

>  With these changes I now have no RFI from either one.

Proper station bonding is quite important, both for safety and to 
minimize noise. But a connection to EARTH, while important for lightning 
protection, is not part of a solution for hum, buzz, or RFI.

http://k9yc.com/GroundingAndAudio.pdf

73, Jim K9YC

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to tnnyswy at yahoo.com