[Elecraft] K3: USB Adapter cooked

[Brian Machesney]

Lee,

I usually have trouble with my DSL connection when I operate high power on
160 and 80, even though the antenna is 200 feet from the shack. I have been
attributing it to RF pickup by the long-ish phone lines and AC wiring in the
house.

This weekend, I had trouble with my amp, so I moved it onto the bench a few
feet away from the main operating position where I could observe it in
action. Surprisingly, the DSL connection worked flawlessly!! The only thing
that changed was the positioning of the cables from the rig to the amp and
from the amp to the window sash through which the cables exit.

The lesson I take from this is that there must be enough RF current on the
coax shields that they radiate enough to disrupt "sensitive" electronics.
Perhaps ferrites over the coax would prevent this happening to you again.

Brian K1LI

On Mon, Jan 26, 2009 at 9:37 AM, Lee Buller <k0wa at swbell.net> wrote:

>
> Now, I know that there are some issues in my shack concerning my Inverted-L
> feed.  The feed point is less that 15 feet from the shack/rig/tuner/amp.
> All were grounded to a single point.  Still, the USB adapter cooked and I
> attribute this to high amounts of RF in the shack.  And, since I am not
> going have any more children...it seems that I just lost the USB adapter.
>
> This only happened on 160 meters.
>
> Any comments?
>
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