[Elecraft] K3S "HI-RFI" warning a bit too sensitive?

[Helmut Berka]

Hi Chris,

Did you tell her / them how dangerous high power RF is and how negative 
it affects a baby?


vy 73 de

Helmut DL2MAJ



Am 17/06/16 um 13:30 schrieb Chris L:
> I believe the manual states that it takes a watt or two of power at the
> antenna connector to set off the HI-RFI warning. Imagine my surprise when I
> began seeing the warning on my brand new K3S just days after I'd assembled
> it. Almost everyone else who has seen this error has been using a K3 in a
> contest environment with multiple transmitters, so I was particularly
> stumped as there are no other transmitters in my shack (everything is
> boxed) and no active hams in my neighborhood. I did some testing and traced
> it to a signal coming in on my 6 meter antenna, which when I disconnected
> it caused the HI-RFI warning to go away. Using a VHF capable SDR in
> wideband mode, I found a strong FM signal on 49.850 and traced it to...
>
> A baby monitor. Yep, not one block from my house lives a couple with a
> cheap 49MHz baby monitor blasting away on 49.850MHz all hours of the day
> and night. A short "fox hunt" with a service monitor confirmed this. There
> is 100KHz worth of splatter coming from this thing and my old Icom 706
> shows it as S9 with the attenuator on (and S9 +60 without). I spoke with
> someone at the house and confirmed that this was the problem by shutting
> down the device for an hour. Unfortunately, the couple's mother-in-law
> lives with them and insists on using the baby monitor all day and night.
>
> I will continue to press for a diplomatic solution (possibly offering to
> buy them a newer 800/900MHz unit), but should I fail at that, is this
> something I should worry about as far as damaging my K3S? I find it hard to
> believe that a baby monitor is pumping out more than 1 watt, so I'm
> inclined to believe that the K3S is being a bit overprotective. This plus
> the fact that my 6 meter antenna is a PAR Omniangle which is
> omnidirectional and according to PAR has no appreciable gain. I'm tempted
> to program the K3S to ignore the HI-RFI warning for the time being.
> Thoughts?
>
> Chris
> KB9SDX
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