[RFI] High CUR on Carolina Windom
Kenneth Goodwin
krgoodwin at comcast.net
Tue Nov 7 12:42:04 EST 2023
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
________________________________
From: rfi-request at contesting.com
Sent: Tuesday, November 7, 2023 11:00 AM
To: rfi at contesting.com
Subject: RFI Digest, Vol 250, Issue 9
Send RFI mailing list submissions to
rfi at contesting.com
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.contesting.com/mailman/listinfo/rfi
or, via email, send a message with subject or body 'help' to
rfi-request at contesting.com
You can reach the person managing the list at
rfi-owner at contesting.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of RFI digest..."
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 at gmail.com>
To: Elecraft List <elecraft at mailman.qth.net>, RFI List
<rfi at contesting.com>
Subject: [RFI] HI CUR warning on K3
Message-ID: <a5389af3-2e69-4662-91db-d5042d8891bc at 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 at unh.edu>
To: Pete Smith N4ZR <pete.n4zr at gmail.com>, Elecraft List
<elecraft at mailman.qth.net>, RFI List <rfi at contesting.com>
Subject: Re: [RFI] HI CUR warning on K3
Message-ID:
<BL3P223MB038571F3C82584606173AAE7E4A9A at 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 at contesting.com> on behalf of Pete Smith N4ZR <pete.n4zr at gmail.com>
Sent: Tuesday, November 7, 2023 10:31 AM
To: Elecraft List <elecraft at mailman.qth.net>; RFI List <rfi at 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
_______________________________________________
RFI mailing list
RFI at contesting.com
https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.contesting.com%2Fmailman%2Flistinfo%2Frfi&data=05%7C01%7Cmike.carter%40unh.edu%7Cfb5c2dea1c504cf20cfa08dbdfa6b4b0%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638349679330548847%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=bo1Yz5uyXwXNO21bur5fVt7fV1Y22Zsocg5KMjAI%2FwU%3D&reserved=0<http://lists.contesting.com/mailman/listinfo/rfi>
------------------------------
Message: 3
Date: Tue, 7 Nov 2023 16:35:34 +0000
From: David Eckhardt <davearea51a at gmail.com>
To: Rob Atkinson <ranchorobbo at gmail.com>
Cc: rfi <rfi at contesting.com>
Subject: Re: [RFI] FW: 65-foot cell tower in Chandler golf community
can't be sto
Message-ID:
<CAODdWWH=uStZk1HS4xpBL4_XmZCQCYHJJbnzgKCDkogHrD4w5w at 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 at 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 at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
--
*Dave - W?LEV*
------------------------------
Subject: Digest Footer
_______________________________________________
RFI mailing list
RFI at contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
------------------------------
End of RFI Digest, Vol 250, Issue 9
***********************************
More information about the RFI
mailing list