[Elecraft] best grounding technique

Jim Brown jim at audiosystemsgroup.com
Sat Mar 20 14:22:56 EDT 2021


On 3/20/2021 8:57 AM, Wes wrote:
> If Rick's comment is accurate, and I have no reason to think otherwise, 
> then what it states is in direct conflict with what one co-author (K9YC) 
> has preached for years, that each box should connect to the next and 
> there is only one connected to the ground system.  He even calls it 
> madness to use individual connections to a common ground bus.

Ward's text on this topic does, include my recommendations for 
"daisy-chain" bonding of interconnected equipment, but also downgrades 
it in favor of a star WITHIN THE STATION, and with an emphasis on 
keeping bonding connections short. He includes a photo I provided of 
W6GJB's neatly packaged station for his contesting trailer, showing a 
copper pape bonding bus just behind the equipment, with bonding 
conductors to it from each piece of gear. The emphasis is on keeping 
bonding conductors very short, both to minimize power line buzz and 
potential differences between equipment in a lightning event. He shows 
how an Al sheet laid on top of the operating desk can serve as both a 
bonding plane and minimize induction onto cables laid on it. And he has 
incorporated my advice that the loop area of interconnecting cables and 
bonding cables should be minimized to prevent magnetic coupling by 
bundling or lacing them together.

There's also very good text on proper shield connections (the Pin One 
Problem), bypassing of unshielded conductors at penetrations of 
enclosures. There's material on the use of ferrite chokes to prevent RF 
in the shack, how to deal with end-fed antennas with a feedpoint in the 
shack, and lots of other good stuff.

Another goal, covered in the last chapter which is not yet done, is to 
address second floor shacks. Outside the shack, there's very good 
discussion of towers, bonding of the entire premises, ground rods, 
connection methods, and so on. Everything conforms to NEC and good 
engineering practice.

73, Jim K9YC


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