Talking to the masses as well as the original poster.
Many of us, this writer included, have experienced RFI, and it almost
never involves something wrong with the K3, or any transceiver, for
that matter. It was lack of bonding and/or grounding, loose leads,
plugs only halfway in, PL259's or BNC's not fastened down all the way,
broken or unsoldered or untightened shield connections, some
unfortunate wide-open physical path into the shack, an RF open barn
door, and more, a long list, sometimes humorous, but all physical,
physical, physical.
Sometimes double digit volts RF wandering around on station conductors.
Need RF blocking? Read K9YC's web page until you understand it, do the
work, don't cheat, don't cheep, don't use junk toroids you can't
positively identify, follow the formula. Do it everywhere, all the
way, by the book.
Many people simply cannot provide sufficient linear separation and the
station is unavoidably in the near field of one antenna or another.
Then the station wiring, RF wise, needs to get clean and tight, just
because the RF is so unavoidably high. Your club buddy can get away
with some stuff, but you can't.
Everyone I personally know that went after RFI studiously and
seriously, also solved it. And it was never fixed by modifying the
transceiver, and I'm talking about multiple brands and models.
If you get RFI now and then, and if you get in contests, be firmly
assured that Murphy knows it, and he will strike in the middle of the
best run you ever had. :>)
Do the work.
73 and good luck,
Guy K2AV
On Wed, May 31, 2017 at 5:49 AM, Richard Hoffman, K1DJ via Elecraft
wrote:
> My recent model K3S feeds a SteppIR 3-element beam with the 30/40 meter
> trombone-shaped driven element on a (short) 40-foot tower. Thanks to the
> SteppIR's tuneability, the SWR is always at or close to 1:1. I operate
> primarily CW, primarily using the internal keyer.
>
> I have noticed that on 20 meters, primarily, but not only, when I am sending
> a contest-type message from the K3S's internal memories, the rig occasionally
> seems to go into some kind of self-oscillation loop. Because it seems to
> happen more often when my beam is pointed in particular directions, I think
> it's most likely an as-yet unsolved RFI/insufficient or improper grounding
> problem in my shack.
>
> But I would appreciate hearing whether you have experienced, and hopefully
> solved, similar problems with the K3 or K3S?
>
> Please let me know, and thanks!
>
> Rich, K1DJ
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