I realize that Eric has ended this thread but I *must* reinforce
Jim's comments.
If your RF ground and utility entrance (power, cable TV, telephone,
satellite TV, emergency generator, etc.) are not *ALL* bonded with
a low impedance conductor you have an extremely dangerous situation.
It is only a matter of *WHEN* not *if* someone is injured or you
suffer significant loss/damage from a lightning induced surge event.
73,
... Joe, W4TV
On 4/12/2011 3:04 PM, Jim Brown wrote:
> On 4/12/2011 11:07 AM, Edward R. Cole wrote:
>> None of my computer chassis are grounded directly to my radio
>> grounds. I made it especially that way to avoid audio ground
>> loops.
>
> That's why I abhor the phrase "ground loop" -- it causes people to do
> exactly the WRONG thing, just as you have done. AC hum, buzz, and RFI
> are CAUSED by not bonding together equipment that is interconnected.
> Study the tutorials in the links I posted yesterday to understand why.
>
> And, as W3FPR has observed, this same lack of bonding that causes hum,
> buzz, and RFI also can cause severe damage in the case of a lightning
> strike or power line spike.
>
> Bottom line -- bonding equipment together, bonding it to your station
> ground, and bonding your station ground to all other grounds in your
> home, are critical both for lightning safety and for minimizing hum,
> buzz, and RFI. Most important -- ERASE THE PHRASE "GROUND LOOP" FROM
> YOUR VOCABULARY!
>
> 73, Jim Brown K9YC
>
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