The Windom has some very odd R + jX characteristics especially at or near
resource. Try at the high end of the band and see if the problem doesn't go
away. Ken K5RG
Sent from Nine
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Subject: RFI Digest, Vol 250, Issue 9
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Today's Topics:
1. HI CUR warning on K3 (Pete Smith N4ZR)
2. Re: HI CUR warning on K3 (Michael Carter)
3. Re: FW: 65-foot cell tower in Chandler golf community can't
be sto (David Eckhardt)
----------------------------------------------------------------------
Message: 1
Date: Tue, 7 Nov 2023 10:31:43 -0500
From: Pete Smith N4ZR <pete.n4zr@gmail.com>
To: Elecraft List <elecraft@mailman.qth.net>, RFI List
<rfi@contesting.com>
Subject: [RFI] HI CUR warning on K3
Message-ID: <a5389af3-2e69-4662-91db-d5042d8891bc@gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
I send a few characters of CW into my Carolina Windom on 40M and after a
delay (1-5 seconds after I stop sending) the K3 flashes a HI CUR
warning, and the audio gain is reduced significantly.? Touch the AF gain
control and it instantly returns the gain to normal, but frequently the
HI CURR warning returns over and over, without any additional
transmissions.? This sequence does not happen, even with 1500 watts,
into my dummy load, nor does it happen on the same antenna on 80M, or on
20 meters on my tribander.
I've read the HI CUR warning discussion on page 65 of the manual, but it
doesn't seem relevant, because I don't have external speakers.? The fact
that it? only happens when feeding an actual antenna on one band
suggests RFI, but the fact that the HI CUR warning and gain reduction
recur again and again long after any RF has me puzzled.? Any suggestions
gratefully accepted!
--
73, Pete N4ZR
------------------------------
Message: 2
Date: Tue, 7 Nov 2023 16:14:59 +0000
From: Michael Carter <Mike.Carter@unh.edu>
To: Pete Smith N4ZR <pete.n4zr@gmail.com>, Elecraft List
<elecraft@mailman.qth.net>, RFI List <rfi@contesting.com>
Subject: Re: [RFI] HI CUR warning on K3
Message-ID:
<BL3P223MB038571F3C82584606173AAE7E4A9A@BL3P223MB0385.NAMP223.PROD.OUTLOOK.COM>
Content-Type: text/plain; charset="us-ascii"
Hi Pete,
I had a similar set of symptoms with my K3
several years back. Turns out it was not the
K3 at all, but a failing filter capacitor in
my linear regulated power supply. I
had sporadic audio dropouts after transmitting
in much the same way as you described,
always at QRP TX levels.
Try a different power supply of newer vintage.
I tested the ESR of the filter capacitors in
my supply and found it to be much too high.
73,
Mike, K8CN
________________________________
From: RFI <rfi-bounces+mike.carter=unh.edu@contesting.com> on behalf of Pete
Smith N4ZR <pete.n4zr@gmail.com>
Sent: Tuesday, November 7, 2023 10:31 AM
To: Elecraft List <elecraft@mailman.qth.net>; RFI List <rfi@contesting.com>
Subject: [RFI] HI CUR warning on K3
CAUTION: This email originated from outside of the University System. Do not
click links or open attachments unless you recognize the sender and know the
content is safe.
I send a few characters of CW into my Carolina Windom on 40M and after a
delay (1-5 seconds after I stop sending) the K3 flashes a HI CUR
warning, and the audio gain is reduced significantly. Touch the AF gain
control and it instantly returns the gain to normal, but frequently the
HI CURR warning returns over and over, without any additional
transmissions. This sequence does not happen, even with 1500 watts,
into my dummy load, nor does it happen on the same antenna on 80M, or on
20 meters on my tribander.
I've read the HI CUR warning discussion on page 65 of the manual, but it
doesn't seem relevant, because I don't have external speakers. The fact
that it only happens when feeding an actual antenna on one band
suggests RFI, but the fact that the HI CUR warning and gain reduction
recur again and again long after any RF has me puzzled. Any suggestions
gratefully accepted!
--
73, Pete N4ZR
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------------------------------
Message: 3
Date: Tue, 7 Nov 2023 16:35:34 +0000
From: David Eckhardt <davearea51a@gmail.com>
To: Rob Atkinson <ranchorobbo@gmail.com>
Cc: rfi <rfi@contesting.com>
Subject: Re: [RFI] FW: 65-foot cell tower in Chandler golf community
can't be sto
Message-ID:
<CAODdWWH=uStZk1HS4xpBL4_XmZCQCYHJJbnzgKCDkogHrD4w5w@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I totally agree with Rob. If the cell network went away, we (my wife and
I) would not miss anything. For one, we have no cell service at home in
the foothill of the Rocky Mountains. We don't miss it. We own a
smartphone but it is used only for traveling, and sparsely at that. As I
write it's sitting to my left OFF and useless. So what?!
When Estes Park had the big flood a few years ago, they were cut off from
the world. Yes, once again, the cell network ceased -
completely....dead......useless. Once again, amateur radio was the only
comm. they had with the outside world.
My wife and I are thankful we do not have cell service at home. We don't
miss it at all.
Dave - W?LEV
On Tue, Nov 7, 2023 at 12:03?PM Rob Atkinson <ranchorobbo@gmail.com> wrote:
> >The difference may be that phone service is vital to 99% of the
> population and
> >most people use it personally daily.
>
> That's your opinion. I guess you think it is vital. And I bet
> millions of people _believe_ it is vital. But the human race did fine
> without cell phones for a hundred thousand years, and speaking for
> myself, if they magically vanished from the world today and we all
> went back to 1975 technology, I'd do quite well thank you. What is
> supremely ironic, is that when cell phones come close to being vital,
> after a Katrina level event, they are wiped out and useless and then
> the much belittled ham radio steps in.
>
> Yes I'm sure the FCC places a high value on the utility of cell phones
> but an awful lot has to do with who can afford lots of really good
> lawyers.
>
> Thank you Don, for your rational analysis.
> http://lists.contesting.com/archives//html/RFI/2023-11/msg00031.html
>
> Rob
> K5UJ
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
--
*Dave - W?LEV*
------------------------------
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