[Elecraft] [K3] KIO3 failure mode

[Clay Autery]

Yup....  Glad my hutch/desk are on ball bearing transfers.... Because I 
remove EVERY cable/wire too.  A year ago March I lost over 20k in 
electronics, et al from a lightning strike on a TREE 20 feet from the 
UN-GROUNDED pedestal.  I'm STILL fighting them to recover.  And with a 
FULLY stuffed K3s/P3 and NO SPARES, I keep a close eye on it.

Clay E. Autery, Jr.
KY5G

On 8/24/2022 1:20 PM, Nick - WB5BKL 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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