If one is grounding on the inside for lightning, you best think
otherwise! Any and all grounding for lightning should be done outside
of the structure. You should have lightning protection devices on all
coax, balanced, and rotor lines installed BEFORE they enter the structure.
Internal grounding or bonding is to keep all equipment at the same
potential.
73
Bob, K4TAX
Message: 10
Date: Sat, 20 Mar 2021 18:11:57 +0200
From: Victor Rosenthal 4X6GP<k2vco....@gmail.com>
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] best grounding technique
Message-ID:<2bd943c9-6513-50a2-0ff8-e990994bb...@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Having a bus that runs the length of an operating desk with all the
equipment connected to it by short straps is not that different from
bonding each piece of equipment to the ones next to it. But it allows
you to remove one unit without breaking the "chain."
This is contrasted to the "star" system, in which each piece of
equipment is grounded to a central point with a relatively long ground lead.
73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/
On 20/03/2021 17:57, Wes wrote:
Interesting.? I don't have (and probably won't buy) the book, but here
we have a disconnect---no pun intended.
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.
This pretty much sums up why I'm not in the market for the book.
Wes? N7WS
On 3/19/2021 2:44 PM, Rick NK7I wrote:
The ARRL book on Grounding and Bonding is very clear.? Each piece of
gear has its OWN wire/strap to a common grounding point (a copper pipe
mounted on a wall is a common method, that being connected to the
system ground; everything to the building safety ground, more ground
rods every 2x the depth of the rod).
Look at it this way, say a discharge comes in through your antenna,
into the radio, connected to your computer and other devices.? Would
you prefer that energy goes only through the radio to ground (losing
the radio) or in a series through everything else in the shack too?
The 'fan' mode you mention is preferred, give that energy EVERY chance
to seek ground BEFORE it passes through your gear.
Energy shunts (PolyPhase devises for example) at the antenna entry
point are another must.? One per feed.
I suggest reading that book, several times (it's complex) for a better
understanding.
73,
Rick NK7I
On 3/19/2021 2:06 PM, Robert G Strickland via Elecraft wrote:
It seems that there are two ways of running grounding wires in the
shack: FAN - from a common ground point, individual grounding wires
are run to each piece of equipment; LINKING - a ground wire is run
from each piece of equipment to the next and eventually ending in a
common ground point. What's the group wisdom on the relative merits
of these two approaches to running grounds in the shack?
...robert
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