Call them what you will, connecting a bunch of station components to a common 
DC power return has to be done very carefully. I've found that often the 
easiest solution is isolated power sources.  Some accessories seem to be 
designed with the assumption of ground isolation using a dedicated wall wart. 

But I'm not going to argue about it. 

73,

Scott. K9MA

----------

Scott Ellington

 --- via iPad

> On Jun 20, 2016, at 7:26 PM, Jim Brown <[email protected]> wrote:
> 
>> On Mon,6/20/2016 4:38 PM, K9MA wrote:
>> Beware ground loops!
> 
> Horse puckey -- ground loops do not exist, and this very false concept has 
> caused hams to do completely wrong things to solve problems with hum, buzz, 
> and RFI.
> 
> http://k9yc.com/GroundingAndAudio.pdf
> 
> 73, Jim K9YC
> 
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