[RFI] Ferrite bead disintegration

[Pete Smith]

Not unless the lightning could find the choke on the cable rack in my 
garage.

73, Pete N4ZR

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On 8/23/2010 10:37 PM, Kim Elmore wrote:
> Lightning will most certainly do that!  I had a strike that blew up
> the beads on a 1:1 balun on my F12 Sigma 80. It also vaporized the
> center conductor of the transmission line within the balun. If you
> had a lightning hit, the beads would have experienced extremely rapid
> heating internally. Chances are that's what shattered the beads .
>
> Kim Elmore, N5OP
>
> At 09:24 PM 8/23/2010, you wrote:
>
>    
>>> I took apart a home-made 100 bead receiving-only common mode choke
>>> yesterday.  As I peeled off the electrical tape I was surprised when
>>> each bead that came out of the wrapping disintegrated into dozens of
>>> fragments.  I think I saved about 5 beads out of a 100-bead choke.
>>>        
>> As I recall from traffic on the Elecraft reflector, you recently took
>> a lightning strike that damaged the IO board in your K3. Perhaps the
>> same event blew up the ferrites. Stranger things have happened when
>> lightning strikes.
>>
>> 73...
>> Randy, W8FN
>>
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