On Thu,6/18/2015 12:14 PM, [email protected] wrote:
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"
The words "ground loop" are misleading, because they do not describe
what is going on, which in turn causes people to do dumb things to solve
the problem.
I've not read the Wikipedia entry. Rather, I'm using EE circuit analysis
101.
73, Jim K9YC
I'm a bit confused.
((((73)))) Milverton / W9MMS.
------------------------------------------------------------------------
*From:* Jim Brown <[email protected]>
*To:* [email protected]
*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
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