[Elecraft] (OT) - Unplanned Discovery

[JT Croteau]

I'm really surprised you had an issue with the KX33 supply.

- JT

On Sun, Nov 19, 2017 at 7:31 PM, rich hurd WC3T <rich at wc3t.us> wrote:
> Wow.
>
> Going to try that.   Thanks for this great post.
>
> On Sun, Nov 19, 2017 at 19:23 stan levandowski <sjl219 at optonline.net> wrote:
>
>> Most people on this Reflector are well educated and intelligent.
>> Apparently, I'm the exception because this one got by me.  I'm only
>> owning up to this in the hope that it might help someone else on the
>> Reflector.
>>
>> For the last couple of years I've been bothered by a high background
>> noise level.   It happened on my K1, K2, K3, KX2 and KX3.   I attributed
>> this to the fact that my antenna has been in my attic for the last
>> fifteen years and propagation hasn't been good lately.
>>
>>
>> I just got official permission from the HOA to install an end fed wire
>> outside.  I was thrilled.  I put it up.  The darn thing wasn't any
>> better than the attic doublet.  Noisy as heck!  What a letdown!
>>
>>
>> So I'm laying in bed last night reflecting on how my little KX1 was the
>> only Elecraft radio that never had noise problems and seemed to have a
>> receiver quieter than my K3.
>>
>>
>> Whoa!  The KX1 always ran on batteries...could it be?????
>>
>>
>> I just took delivery on a brand new Kx33 Low RFI power supply a couple
>> days ago. It was advertised in the last QST.   Previous to that, I've
>> been using a Samlex 1235M.  For the heck of it,  I connected my K2 to an
>> SLA battery and the noise was still there.  But when I disconnected the
>> Kx33 power supply from the wall, the noise level dropped dramatically.
>> Then I switched to the Samlex and the noise came back.  Back on the
>> battery, the noise dropped again as long as the power supplies were
>> unplugged and dead.
>>
>>
>> I have a laptop next to the computer.  When I pulled the plug on the
>> laptop supply, the rest of the noise went away.  I was down to S0/S1 and
>> CW signals were popping out all over the band again.  Running the
>> computer on its internal battery did NOT contribute any noise.  It was
>> the computer power supply.
>>
>>
>> Now that I am totally on batteries, I also appear to be immune from both
>> the gas furnace and the dishwasher motor both of which caused me
>> problems when using the AC supplies.  YES, I HAD CHOKES ON ALL SUPPLIES,
>> CABLES, WIRE.
>>
>>
>> I've been on the air all day with my new outside antenna, on battery
>> power,  making contacts near and far and I feel like I've hit the
>> jackpot.  Since I'm totally QRP and CW, being limited to batteries is
>> not an issue.
>>
>>
>> If you're going to check your own supplies out, remember they've got to
>> be OFF/UNPLUGGED from the wall. Just disconnecting them from the
>> radio/computer isn't enough.  It's RF.
>>
>>
>> 73, Stan WB2LQF
>>
>>
>>
>>
>>
>>
>> 1
>>
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>
> --
> ---
> 72,
> Rich Hurd / WC3T / DMR: 3142737
> PA Army MARS, Northampton County RACES, EPA-ARRL Public Information Officer
> for Scouting
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