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Locked
Re: Owen Duffys blog closed
In case you are interested the way back machine has archived content from
owenduffy.net. This appears to be the last time they were able to successfully get new content from the site. I was not aware of this site ands it appears to be a great loss to the community. Regards, Roger On Mon, Jan 27, 2025 at 10:47?AM Fred_M via groups.io <dl4zao= [email protected]> wrote: Sad news: |
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F.S. Common Mode test fixture
I built this fixture some time ago. It makes measuring chokes, baluns and ununs common mode very simple. The SOL(T) CAL loads are built onto the PCB.
My interest in common mode reduction now lies in VHF and UHF where this jig will not function because of lead lengths. All mounting hardware (except the banana sockets) has been replaced with stainless steel. $50 includes USPS shipping in the USA. Regards, Dale W4OP |
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Re: Owen Duffys blog closed
There has been some discussion of this here in VK1 land and at least one
local is trying to convince Owen to pass the baton to someone else, but for now it seems that the Internet Archive may well be your best bet: -- MC VK1MC |
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Re: Owen Duffys blog closed
That is hilarious!!!
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On 1/28/25 14:38, Ray W8LYJ via groups.io wrote:
As my friend Tom (SK) use to tell me 80% of what you read about antennas on the internet is BS. Only trust information written by the Brits. I guess I would include articles, studies by Cebik. |
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Re: test board, how to use
On Monday 27 January 2025 01:36:32 pm Larry Goga via groups.io wrote:
Attached to this messages a 2-page PDF that includes some images of the PCB and shows how some of the pads are inter-connected. ?See page-2.Thanks for that. I have one of those boards, have started to solder the sockets but didn't get the whole way through the process. I didn't get the resistors mentioned in the pdf, but not a big deal... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
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Re: Owen Duffys blog closed
As my friend Tom (SK) use to tell me 80% of what you read about antennas on the internet is BS. Only trust information written by the Brits. I guess I would include articles, studies by Cebik.
Ray W8LYJ |
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Re: Owen Duffys blog closed
On Tue, Jan 28, 2025 at 06:27 AM, Rick Murphy wrote:
Rick, I agree with your comment. Owen Duffy has the copyright to all material he created on his site. The Wayback machine may have scraped it but that does not affect his copyright. Anyone re-posting his blog articles should have his explicit permission to do so. That is only legal way to proceed and shows common courtesy and respect for someone who has published so many articles for free that have benefited the technical community. Roger |
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Re: Owen Duffys blog closed
I sorry to say Owen has responded with the following.
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"Hello Mikek, Thanks for your kind words. I have made a decision to close the site. There are a lot of factors at play, but essentially I need to be aware of the benefit that the public web site might provide to others and myself, my capacity to maintain its quality, and the cost. Important to the quality issue is my own cognitive capacity. In a timely way I am retiring from the publishing phase before too many people are saying "he has lost it." The content is not available for hosting elsewhere. 73 Owen On 29/01/25 02:56, Mikek wrote:
There is a discussion on the NanoVNA IOgroups discussing how much we will miss the information on your site. |
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Re: Owen Duffys blog closed
I sent an email to a good address as of 12-2024 telling him about this discussion and asking if someone else could host the site.
Hosting is not something I can do, but I would make a donation if/when needed. Mikek |
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Re: Owen Duffys blog closed
As far as I know, he¡¯s still alive. Just took down his web content.
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On Jan 28, 2025, at 10:17, Mike N2MS via groups.io <mstangelo@...> wrote: |
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Re: Owen Duffys blog closed
Actually he has...? Look at the last entry in the wayback machine...? I saw something there, but can no longer locate it... It was the last entry...
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73, and thanks, Dave (NK7Z) ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 1/28/25 06:27, Rick Murphy via groups.io wrote:
Has Owen expressed any opinion on someone resurrecting his content? |
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Re: Owen Duffys blog closed
I agree that a resource like Owen Duffy's should be preserved. Here's what he called "The fine print" on his blog. Note the next-to-last line about copyright.
"The fine print The information presented on the pages of this website are, unless stated otherwise the personal work of Owen Duffy and are not usually peer-reviewed. Although a great deal of effort is made to ensure the accuracy of content, it may contain residual errors. Readers should not depend on the content without independent verification. The author welcomes feedback on the web content, and if suspected errors are identified, every effort will be made to promptly investigate the reports and update the relevant pages, email the webmaster. As a result of this process, pages may be updated with changes or corrections from time to time. Use at your own risk, not warranted for any purpose. Do not depend on any results without independent verification. All work is ? Copyright: Owen Duffy 1995, 2015. All rights reserved. Last update: 8th March, 2015, 8:09 PM" |
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Re: Owen Duffys blog closed
Agreed. Does anyone know how to get in touch with Owen Duffy or his estate? we should get permission before contributing any data.
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Mike N2MS On 01/28/2025 9:27 AM EST Rick Murphy via groups.io <k1mu.nospam@...> wrote: |
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Re: Owen Duffys blog closed
If anyone is willing to do the work, please raise your hand. Obvious first step is to get his permission. In that context of a contact, if here wants to just get out of supporting the site, I am willing to add his site registration the one I already hold.
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Again I have no skills in this area but will support anyone who does have skills and intent with site registration and hosting services. Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y W8YCM/6Y 6Y8LV (Reformed USNSG CTM1) lester@... 452 Stable Ln Keyser WV 26726 USA GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741 W (GPSDO) Telephones: Home: +1-304-289-6057 US cell +1-304-790-9192 Jamaica cell: +1-876-456-8898 -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Rick Murphy via groups.io Sent: Tuesday, January 28, 2025 9:27 AM To: [email protected] Subject: Re: [nanovna-users] Owen Duffys blog closed Has Owen expressed any opinion on someone resurrecting his content? He's the copyright owner. It' s his choice on whether or not this should be brought back. As a simple courtesy, before you decide to do anything, I'd reach out for permission. Better that than getting a legal demand to take the site down after a bunch of work. -Rick On Tue, Jan 28, 2025 at 9:18?AM Lester Veenstra via groups.io <m0ycm= [email protected]> wrote: I am willing to get and support a site but I do not have the web HTML etc-- Rick Murphy, D. Sc., CISSP-ISSAP, K1MU/4, Annandale VA USA |
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Re: Owen Duffys blog closed
Has Owen expressed any opinion on someone resurrecting his content?
He's the copyright owner. It' s his choice on whether or not this should be brought back. As a simple courtesy, before you decide to do anything, I'd reach out for permission. Better that than getting a legal demand to take the site down after a bunch of work. -Rick On Tue, Jan 28, 2025 at 9:18?AM Lester Veenstra via groups.io <m0ycm= [email protected]> wrote: I am willing to get and support a site but I do not have the web HTML etc-- Rick Murphy, D. Sc., CISSP-ISSAP, K1MU/4, Annandale VA USA |
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Re: Owen Duffys blog closed
I now own and can host RFDUFFY.com
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Who will step up and recreate the site from Duffy's orginal? Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y W8YCM/6Y 6Y8LV (Reformed USNSG CTM1) lester@... 452 Stable Ln Keyser WV 26726 USA GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741 W (GPSDO) Telephones: Home: +1-304-289-6057 US cell +1-304-790-9192 Jamaica cell: +1-876-456-8898 -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Mikek Sent: Monday, January 27, 2025 3:25 PM To: [email protected] Subject: Re: [nanovna-users] Owen Duffys blog closed Is there any chance of someone else hosting the info on their site? We lost a treasure load of info when The Radioboard was lost after the long time owner turned it over to someone and then they got a severe case of Covid. They were so sick they didn't pay the website fee and it was all lost. Very sad. Mikek |
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Re: Owen Duffys blog closed
I am willing to get and support a site but I do not have the web HTML etc skills to resurrect his site. Who can and will?
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Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y W8YCM/6Y 6Y8LV (Reformed USNSG CTM1) lester@... 452 Stable Ln Keyser WV 26726 USA GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741 W (GPSDO) Telephones: Home: +1-304-289-6057 US cell +1-304-790-9192 Jamaica cell: +1-876-456-8898 -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Mikek Sent: Monday, January 27, 2025 3:25 PM To: [email protected] Subject: Re: [nanovna-users] Owen Duffys blog closed Is there any chance of someone else hosting the info on their site? We lost a treasure load of info when The Radioboard was lost after the long time owner turned it over to someone and then they got a severe case of Covid. They were so sick they didn't pay the website fee and it was all lost. Very sad. Mikek |
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Re: Owen Duffys blog closed
If I were to get a suitable URL; would anyone be willing to reconstruct his site as a project?
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Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y W8YCM/6Y 6Y8LV (Reformed USNSG CTM1) lester@... 452 Stable Ln Keyser WV 26726 USA GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741 W (GPSDO) Telephones: Home: +1-304-289-6057 US cell +1-304-790-9192 Jamaica cell: +1-876-456-8898 -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Roger Need via groups.io Sent: Monday, January 27, 2025 12:43 PM To: [email protected] Subject: Re: [nanovna-users] Owen Duffys blog closed You can add my name to the long list of readers that will miss Owen Duffy's blog. There is a lot of misinformation on the Web when it comes to RF topics and many of his posts were a well written technical rebuttal to many of these myths and falsehoods. His treatise of a given topic was always backed up with facts, example calculations and graphics. His online calculators were very useful and unfortunately no longer available. Owen reads this group's messages and he had a particular interest in how to get the most out of a NanoVNA. Many posts were about getting accurate results and methods to achieve this. His other contributions were his modifications and bug fixes to the NanoVNA app (which OneOfEleven donated to the community). He also corresponded with DiSlord and suggested improvements to the firmware which enhanced the NanoVNA feature set. On a personal level we communicated several times via email and I enjoyed the technical exchange. I appreciated his expertise and the mentoring that he provided to me. Publishing a blog that is technically accurate and has useful articles takes considerable time and effort. There is also the financial cost associated with keeping a domain name. I guess after many years he felt it was time to move on to other interests. Owen you will be missed. Roger Need in Canada |
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Re: 1.2.40 strange displayed S11 Smith value
Only in some directions, average. The anisotropy of the Cosmic Microwave Background (CMB) is about 1 part in 1E5.
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(and the temperature you radiate to in a blackbody sense only partly accounts for your temperature... given that most cal loads are shiny metal, I'd bet they get pretty hot out in space, if the sun shines on them - that epsilon/alpha ratio is important - as you burn your hand on the shiny seat belt buckle) -----Original Message-----
From: <[email protected]> Sent: Jan 27, 2025 8:10 AM To: <[email protected]> Subject: Re: [nanovna-users] 1.2.40 strange displayed S11 Smith value This is why the true calibration aficionados only calibrate in the cold of outer space. There, the temperature is a nice, steady 2.72548±0.00057 K. -- ww6x On Sun, Jan 26, 2025, at 8:52 PM, KENT BRITAIN wrote: Uhhhh ..... that level of accuracy is only true at one Altitude, |
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Re: Owen Duffys blog closed
Indeed, hopefully temporary.? But meanwhile it seems that most posts are available via the web archive at archive.orgSent from my Galaxy
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-------- Original message --------From: "Mike via groups.io" <mail@...> Date: 28/1/25 7:54?pm (GMT+10:00) To: [email protected] Subject: Re: [nanovna-users] Owen Duffys blog closed I am so sorry to hear this. I made a lot of use of Owen's online calculators and he reviewed a couple of projects I'd been working on (favourably). Sometimes Owen would pick up on posts I'd made to qrz.com and email me with his advice.We can only hope that it's a temporary glitch?-- Mike G8GYW
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Roger Need
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