On May 6, 2:42*am, w_tom wrote:
* *This will address some of your questions only in summary. *Details
are provided in other posts.

* First, much of this stuff was learned by earliest 20th century
hams. *They would disconnect their antenna, put the lead inside a
mason jar, and still suffer radio damage. Even mason jars could not
stop or block lightning.

I'd love to see a reference for this. In that time frame, lightning
was already fairly well understood. I find it hard to believe any ham
would try to use a mason jar in this way. Sounds more like some urban
legend to me.



But then the antenna was earthed, then damage
stopped. *It's just like Franklin's lightning rod (air terminal).
Protection has always been about diverting "it to ground, where it can
do no harm". *Disconnecting did not provide sufficient protection.
That wire had to be earthed.

* Protection for the TV, computer, and all other appliances is same.
Computers contain some of the most robust protection. *Computer grade
UPSes can output electricity so dirty (when in battery backup mode) as
to even harm some small electric motors. *But computers are so robust
as to make even that 'dirty' electricity irrelevant. *Do not assume
computers have less internal protection. *Intel ATX standards require
computers to be more robust than what is standard for other
appliances.


And guess what component is used as part of that robust protection?
MOVs, which W_ denies are used in electronics/appliances. Once again,
I'll ask the same question W_ refuses to answer. How is it that MOVs
or any other component can offer protection when used in a PC power
supply, but are useless in a plug-in surge protector? According to
W_, surge protection is impossible unless there is a direct and short
connection to earth ground. Does the PC power supply come with a
built-in earth ground?