[Elecraft] NOT the feedline (was KPA-1500 faulting on 6m; SWR issues)

[Jim Brown]

On 6/1/2020 6:37 AM, stephen shearer wrote:
> Ground loops can be another issue.
> I was having a "feed back" issue with my KX3/KXPA100 ans solved it 
> eliminating ground/power loops.

DANGER, WILL ROBINSON!

First, ain't no such thing as a "ground loop." The real cause of 
problems we BLAME on this fictional condition is failure to do proper 
bonding within our stations and all other "grounds" in our homes.

BY LAW (Electrical Building Codes, usually a version of NEC or based on 
NEC), ALL grounds in any facility must be bonded together. At a minimum, 
all equipment plugged into the wall must have its chassis bonded to the 
green wire in its power cord.

In a ham station, every chassis must be directly bonded to the others by 
short, fat copper, AND all equipment that will be interconnected with 
the station (rig, computer, audio interface) should get AC power from 
outlets that share the same green wire back to the breaker panel.

Lots of detail on this in http://k9yc.com/GroundingAndAudio.pdf  and in 
N0AX's ARRL book on the topic, on which we collaborated.

73, Jim K9YC