[Elecraft] [K3] KIO3 failure mode

[Walter Underwood]

You could get one of these “router EMF guards". Tinfoil hat is optional. Do not click on this if stupidity makes your brain hurt.

https://smile.amazon.com/dp/B07MXD75TR/ <https://smile.amazon.com/dp/B07MXD75TR/>

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Aug 24, 2022, at 11:20 AM, Nick - WB5BKL <wb5bkl at gmail.com> wrote:
> 
> What Dave said.  Almost identical here.
> 
> Now, during t-storms, the K3 is a box sitting on the desk with _nothing_  repeat _nothing_ connected.  If I thought wrapping it with tinfoil* would help...
> 
> cln - Nick
> WB5BKL
> Lake Buchanan, TX
> 
> *  One of my neighbors has a plentiful supply.
> 
> 
> 
> On 8/24/22 11:49, elecraft-request at mailman.qth.net wrote:
>> Message: 9
>> Date: Tue, 23 Aug 2022 14:47:24 -0700
>> From: David Gilbert<ab7echo at za*****.com>
>> To:
>> Subject: Re: [Elecraft] [K3] KIO3 failure mode
>> 
>> 
>> When my KIO3 got zapped, I had everything disconnected.? Antenna and all
>> accessories from the K3 ... power supply as well.? The one thing I
>> didn't have disconnected was the RS-232 link between the laptop and the
>> KIO3.? Somehow a transient from a nearby lightning strike (not a direct
>> one to my tower) traveled through the laptop power brick and to an
>> otherwise completely floating K3.? If I remember correctly, the laptop
>> power supply was even plugged into a quality surge protected UPS.
>> 
>> It takes very little to zap the KIO3.? I now disconnect EVERYTHING in
>> the shack during lightning season.
> 
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