Let's think about this. The difference of potential between cloud and
ground supports an arc of hundreds of feet. You are suggesting putting a
switch in line with a wire that connects to the radio to 'protect' it.
Won't the lightning just jump the open switch contacts?
--
73,
-de John NI0K
Douglas Hagerman via Elecraft wrote on 1/18/2021 12:39 PM:
As I understand it, there should be a multi-level defense.
Direct bonding to ground rods for any towers or support poles, plus the
standard “automatic” grounding for the antenna wires using those things with
the little metal chips in a tube, plus lots of ground rods, plus bonding of the
antenna ground system to the household electric ground. All done outside the
building.
Household surge protector in the breaker box, plus perhaps two more in series
with the radio power supply. Also on the cable connection to the house.
And then disconnect switches on everything that plugs into the radio, including
coax, USB, Ethernet, headphones, keys, power, etc., because induced voltage
within the house can also be a problem.
So what would be nice would be a single box, controlled by the radio power switch,
with relay disconnect of “anything you can think of that has a wire on it."
Doug, W0UHU
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