George,
I think you are talking about apples and oranges. Yes, a good ground
rod system is for lightning protection. I have a grounding system in
place at my house with a driven stake at each place where the perimeter
wire connecting them make a 45 degree turn or more. That is also
connected to the Utility Entry Ground rod.
If you are fighting audio noise, hum and buzz problems (now that we have
low level audio stuff in the hamshack) - disconnect that wire AND bond
all enclosures together as K9YC suggests.
We have the "pin 1" problem in modern ham gear. In olden days, it was
not a problem because connectors were mounted on the enclosure
metalwork, and any pickup of hum, buzz and noise was conducted on the
'outside' of the enclosure and away from thee signal lines on the inside.
Today's practice is to mount those connectors directly to a PC board
where any hum, buzz and noise will be conducted onto the PC board ground
plane where it will couple to the signal PC traces.
For purposes of hum, buzz and noise reduction, that Power Supply should
be cut and the enclosures in the system bonded directly together (not
each to a single point ground).
Remember that this bonding and grounding will NOT help with RF problems
- those are taken care of with good common mode chokes in the antenna
system to choke off current on the outside of the coax shields.
73,
Don W3FPR
On 4/16/2018 9:28 AM, George Danner wrote:
Re-Connect it!
From a broadcaster (AM,FM & TV) was in South Florida (lightning
capital of
North America).
The more massive the common (ground, bonding, whatever term you use) for
the connection between equipment and the power company ground connection
the better.
We even used ring grounds around studio & transmitter building with
ground rods every 10' all cad-welded. This is probably over kill for a
ham station; but think as massive as you can.
Towers at 500' or above had 2 ring grounds and lots of ground rods.
The common for equipment interconnection is for safety first and the
reduction of voltage drops on the common lines that can transfer from
one piece of equipment to another (us old timers use the term ground
loop - not PC any more).
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