On 8/17/2020 4:04 AM, Tom Doligalski via Elecraft wrote:
I’ve had a similar experience: lightning came in via the cable line,
Lightning also induces current on wiring inside our homes.
took out the cable modem, the router, the PC, and the serial interface
on the K3.
This is a VERY common problem. It is caused by failure to do proper
bonding, and by the use of SHUNT-mode surge protectors like MOVs.
SERIES-mode protectors, like those made by Brick Wall and Surge-X do NOT
cause these failures. They're not cheap, but neither is the equipment
they're protecting. Pin One Problems are another cause, and every ham
rig I've ever inspected has them, including the K3.
Study Ward Silver's excellent ARRL book on the topic, and/or
http://k9yc.com/GroundingAndAudio.pdf and get VERY serious about
bonding both in your shack and throughout your home.
At this point the replacement PC communicates with the internet using WiFi.
That's a very good replacement for wired Ethernet, and eliminates one
part of the problem. I've used it for about 16 years, starting in a
Chicago residential neighborhood and continuing when I moved to the
Santa Cruz Mtns in 2006.
73, Jim K9YC
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