[Elecraft] K3 KAT3 strange behaviour

[Guy Olinger K2AV]

At our IOTA site we were using 450 line as tuned feeders to a pair of
orthogonal multiband doublets.  We had the 450 line tied for support
in the almost constant 15 knot sea breeze. At some point something
flapped into a loop and pinched the conductors closer together on one
of the lines.  It wacked all the K3 auto-tuner settings and you
couldn't switch back and forth without retuning.  It took us a while
to spot the problem.

73, Guy.

On Mon, Dec 6, 2010 at 2:44 AM, Gary Gregory <garyvk4fd at gmail.com> wrote:
> Hi Tony,
>
> The open wire feeder was at fault as the route I had used had a bend which
> made a parallel path and when I straightened this out the issue went away.
>
> All is now as it should....:-)
>
> Thanks for the info mate.
>
> Gary
>
> On Mon, Dec 6, 2010 at 7:58 AM, Tony Estep <esteptony at gmail.com> wrote:
>
>> >
>> > On 12/05/2010 11:40 PM, elecraft-request at mailman.qth.net wrote:
>> > > From: Gary Gregory<garyvk4fd at gmail.com>
>> > >...using a double extended zepp I find it tunes all bands except 20M
>> > > consistently but for a couple of weeks it has been fine.
>> > >
>> > > The KAT3 will tune to 1.1:1 BUT the swr meter fluctuates...
>>
>>  Gary, in my case the fluctuating SWR indication turned out to be
>> attributable to my station ground setup. It seems that just a small amount
>> of RF on the feedline can create this symptom. My non-resonant antenna
>> comes
>> into a balun, then the coax goes through a line isolator, and thence to the
>> rig. There is a counterpoise arrangement connected at the balun which has
>> served satisfactorily to ground everything with a couple of antennas.
>> However, when I put up a new one, I got the symptom you describe. Some
>> tweaking of the grounding scheme completely cured it.
>>
>> Tony KT0NY
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>
>
>
> --
> Gary
> VK4FD - Motorhome Mobile
> http://www.qsl.net/vk4fd/
> K3 #679, P3 #546
> For everything else there's Mastercard!!!
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