> Scenario: A thunderstorm passes through and the
> equipment takes an indirect surge from a nearby strike
> or in the desert a Ham's station gets whacked by major
> static buildup (despite efforts to protect the gear).
> (Or for disaster-response the consequence of EMP.)
EMP worries are overblown if you use reasonable care in
cabling and grounding. My tall tower (318 foot) gets hit
about a dozen times a year or more. Smaller towers (~200
ft ) get hit once in a while also.
I don't have a single polyphasor or anything else except
some of the home entertainment centers have those lightning
protection outlet strips that pass the antenna and phone
line along with the outlet power.
I have lots of sensitive gear and never lose any of it by
lightning. I never even lost a TV set or even a modem. It
all stays connected 24/7 except in the shop where I unplug
the printer port connections, power line, and probes on the
very expensive very sensitive gear. The rest of the test
gear including DVM's still have the leads connected. The
most frequent damage I have is a cable shield on smaller
coax gets blown up, but nothing will protect that except
removing the cable.
I saw a presentation on EMP at the Public Service Training
Center by some Quack here in Georgia and it was laughable.
He talked about charging a capacitor up and using a small
explosive device to collapse a coil while the capacitor was
connected to the coil to generate an EMP that would "wipe
out all communications for miles". They actually paid him to
spew that drivel.
73 Tom
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