[Elecraft] KPA1500 RFI on 12m

[Michael Walker]

Hi Eric

I think you are asking a lot for a tuner to run at any power into a
non-resonant antenna and break a pile up.  :)

You would actually have better success with a 12M dipole then trying to get
a non-resonant beam to direct your signal.

If I was in your shoes, I would quickly toss up a 12M dipole with some
string and bubble gum as you would have a much higher radiated signal.

Mike va3mw


On Thu, Oct 24, 2019 at 4:08 PM eric norris via Elecraft <
elecraft at mailman.qth.net> wrote:

> My Force 12 C3 antenna is not resonant on 12m.  Using the K3 barefoot, the
> internal atu tunes the antenna fine.  Bypassing the K3 atu, but still
> running barefoot into the KPA1500 atu, the KPA atu loses it's mind and goes
> in and out of TUNE mode uncommanded.  Even though the KPA has found a
> match, trying to transmit through it at the 100w level is impossible
> because of the constant retuning.
> I have put my small collection of mix-31 ferrites on the antenna output,
> input, and KPA control line at the KPA, each at a time, with no success.
> Any ideas?  I would like to be able to run the KPA at least a few hundred
> watts to have the proverbial snowball's chance to break the VP6R pileup on
> 12m CW.
> Any useful comments appreciated.
> 73 Eric WD6DBM
>
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