[RFI] Ferrite bead disintegration

[Kim Elmore]

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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