Elecraft] best grounding technique

[Bob McGraw - K4TAX]

I suppose one should initially define "best" .    I take the approach
that the NEC code is to be followed under any and all conditions.

As to general station configuration I refer you to the work of Jim
Brown, K9YC.  He has done extensive work and produced publications on
the topic.    He advocates the LINKING approach also known as daisy
chain connection to a common ground point. With each ground conductor
having a few milliohms of resistance, we find total resistance is the
sum of the individual resistances.   R total = R1 + R2  + R3 + ...........

I prefer to use the FAN approach or STAR ground system. The station
power supply ground is the common point for each piece of station
equipment to be connected with a dedicated ground conductor.  With each
ground conductor connected to a common point we then find the total
resistance is resistors in parallel.  R total = R1*R2/R1 + R2  or

R total = 1/ [(1/r1) +(1/r2) + (1/r3)]......... In this case the total R
is less than that of the lowest value resistance present.

Just be sure all feed lines and rotor lines have lightning protection
devices on each one and they are outside of the house. Any driven ground
MUST be bonded to the AC Mains ground for the service.   This is a
requirement of the NEC.

73

Bob, K4TAX


Message: 15

Date: Fri, 19 Mar 2021 21:06:47 +0000

From: Robert G Strickland <[hidden email]>

To: Elecraft Reflector <[hidden email]>

Subject: [Elecraft] best grounding technique

Message-ID: <[hidden email]>

Content-Type: text/plain; charset=ISO-8859-1; format=flowed

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

-- Robert G Strickland, PhD ABPH - KE2WY [hidden email]
Syracuse, New York, USA

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