All of the replies I've seen here are obsessing on the wrong topic. By
all means DO take care to avoid oxidation and dissimilar metals
problems. But that ground bar, whatever it is, is NOT an important
element of what you're doing, which is primarily LIGHTNING SUPPRESSION,
but also minimizing hum, buzz, and RFI.
What matters is that EVERY CHASSIS in your shack be bonded together by
short fat copper, and that combination of chassis bonded to everything
in your house by short fat copper. That includes antenna entry, every
ground rod, the power system ground, the telco ground, the CATV ground,
the satellite ground, structrural steel ground (if any), and, if your
tower is close to the house, the tower ground.
You are also forgetting that bonding between equipment should also be
short, fat copper. When you run wires from each piece of gear to a bar
at the back of he desk, that usually makes the connection more than
twice as long. That means double the resistance and double the
inductance. NOT a good thing.
The BEST bonding method in the shack is short, fat copper from chassis
to chassis of every piece of gear in the shack, then a bond from one of
those chassis (preferably the rig) to those other grounds in your home.
Chassis to chassis bonding minimizes hum, buzz, and RFI. Bonding all the
grounds together and to earth provides lightning safety.
73, Jim K9YC
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