User talk:Chetvorno
ATextbookOfGeneralAstronomy_Frontispiece_i_48color.png){kind=link}
Image:Turkey.Konya007.jpg[edit]
I appreciate your effort to improve the original image. But I'm afraid that your version doesn't resemble the clock as it stands in the museum. The image is just too bright. You have to keep in mind that the interior of the Mevlana museum is rather dark. My photo was made with flashlight and renders the exact colors. I admit the sign on the wall could have been filtered out by me. But you're always free to give it another try. JoJan 15:52, 3 December 2007 (UTC)
- I'm afraid I sacrificed faithfully rendering the lighting in your beautiful original photo for a purpose. I was trying to bring out the clock's details so I could use the picture in the article Wikipedia:Longcase clock. In the original, you can barely see the clock's face. I agree, it does look garish. I uploaded another version. It still looks like it's floodlighted, but the colors are a little more realistic. --Chetvorno 11:54, 4 December 2007 (UTC)
| Image deletion warning | Image:Gold_leaf_electroscope_amateur.jpg has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry. If you created this image, please note that the fact that it has been proposed for deletion does not necessarily mean that we do not value your kind contribution. It simply means that one person believes that there is some specific problem with it, such as a copyright issue. If the file is up for deletion because it has been superseded by a superior derivative of your work, consider the notion that although the file may be deleted, your hard work (which we all greatly appreciate) lives on in the new file. |
You can upload your animated SVG on commons, even if Wikipedia can't display them, that can allow (wiki)graphists to learn more about Animated SVG (which display fine when look directly on the true url , ex. http://upload.wikimedia.org/wikipedia/commons/1/1b/Animate_sbs.svg_tutorial.svg ), and encourage to allow SVG animation directly on wikipedia. 19:01, 23 December 2007 (UTC)
Mignon 4 typewriter[edit]
Thank you for correcting info in Image:Maszyna.do.pisania.XIXw.jpg.
There is small one question regarding this typewriter: you can see three buttons here, but on Image:Maszyna.do.pisania.XIXw.jpg there are only two...
Best regards,
Julo 19:31, 14 January 2008 (UTC)
- I see, you're right. Your machine must be a Mignon 3, not Mignon 4. From The Virtual Typewriter Museum, 'The only difference between the Mignon 3 and 4 was the addition of a backspace key to the right of the mechanism.' I changed the image description. --Chetvorno 19:45, 14 January 2008 (UTC)
Home recording v/s dictation machine[edit]
The machine shown at Image:PhonoCylinderHomeRecord.jpg is a home phonograph with recording head attachment, not uncommon at the era, and not the same as the dictation machines of the era, which had additional machinery, for example enabling stenographers to pause or replay sections of a recording. Cheers, -- Infrogmation 01:54, 4 February 2008 (UTC)
Image:TelescopeLick36in_CharlesAYoung(1916)ATextbookOfGeneralAstronomy_Frontispiece_i_48color.png[edit]
ATextbookOfGeneralAstronomy_Frontispiece_i_48color.png&action=edit&redlink=1){kind=link}
| Image deletion warning | Image:TelescopeLick36in_CharlesAYoung(1916)ATextbookOfGeneralAstronomy_Frontispiece_i_48color.png has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry. If you created this image, please note that the fact that it has been proposed for deletion does not necessarily mean that we do not value your kind contribution. It simply means that one person believes that there is some specific problem with it, such as a copyright issue. |
ATextbookOfGeneralAstronomy_Frontispiece_i_48color.png&action=edit&redlink=1){kind=link}
Chetvorno (talk) 23:15, 28 June 2008 (UTC)
- Deleted this image as a duplicate, no worries. Please just use {{Duplicate}} for such cases in future. -mattbuck (Talk) 23:55, 28 June 2008 (UTC)
You're now a filemover[edit]
Hi Chetvorno, you're now a filemover. When moving files please respect the following advice:
- Use the CommonsDelinker link in the {{Rename}} template to order a bot to replace all ocurrences of the old title with the new one.
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Geagea (talk) 23:05, 28 December 2010 (UTC)
TUSC token 61e8a8d17b805e6ed390836c2e53bcfc[edit]
I am now proud owner of a TUSC account!
Your pictures about negative differential resistance[edit]
I have placed your two pictures about negative differential resistance at the top of Circuit idea story about negative differential resistance as they look very well; I like them. I have only made some corrections in CCNR image. If you have something against, let me know and I will remove them. Circuit-fantasist (talk) 22:22, 16 August 2012 (UTC)
- I think its a little misleading to say the current controlled graph looks like a neon lamp characteristic. The neon lamp has a much flatter curve below the breakdown voltage V2 and a much sharper falloff of voltage above it. I added the statement that the voltage controlled graph looks like a tunnel diode curve because it happened to come out very close to an actual tunnel diode curve, not just to give an example. --Chetvorno (talk) 06:10, 17 August 2012 (UTC)
Your page move of File:Electrical Experimenter Aug 1916 pg228.png was not the best way to create a cropped image for the De Forest advertisement. You should have just created a new page named Audion vacuum tube advertisement.png. The Clapp-Eastman advertisement is lost. I have asked on Commons:Village_pump#Unusual_Page_Move for assistance on correcting this. -- Swtpc6800 (talk) 06:57, 12 January 2013 (UTC)
- Yes, this was a very bad move. The cropped version should have been uploaded as a seperate file, and the original page left alone, with the original correct name. Please study the guidelines for renaming files {and associated talk page} and understand the value of not moving/renaming files unless really necessary. Also large modifications to existing files should almost aways be uploaded as seperate files. In this case the original file is a record of the complete printed page and is part of a set of images of the publication and should not have been over written with something different. --Tony Wills (talk) 07:52, 12 January 2013 (UTC)
- I'm really sorry; I should have known better. I salvaged a copy of the original file and uploaded it to File:Electrical Experimenter Aug 1916 pg 228.png. Hope this will help undo some of the damage. --Chetvorno (talk) 10:30, 12 January 2013 (UTC)
Picture of the Year 2013 R1 Announcement[edit]
File:Broadcasting_a_radio_play_at_NBC_studio.jpg[edit]
Hello! The date listed on the image (1907) seems a bit off, because the first commercial broadcast station (KDKA) went live in 1930. Unless there is time-travel involved, I'm not sure how they did it. :) — Safety Cap (talk) 01:49, 19 April 2014 (UTC)
- Thanks so much for catching that; I should have noticed that little anachronism. You really uncovered a mystery, though. The source I got the picture from, an encyclopedia on Google Books, lists a publication date of 1907, and it's title page is stamped "Harvard Library 1908". Yet the text has references to dates up to 1931!!!! It was obviously written after that date. You must have been right about the time travel.
- BTW, didn't KDKA begin broadcasting in 1919, not 1930?--Chetvorno (talk) 05:06, 19 April 2014 (UTC)
Upcoming Wiki Science Competition[edit]
Hi, I am contacting all active commons users I can find more interested in the management of pictures related to scientific topics. If you have time, could you take a look in Commons:Village_pump#Upcoming_Wiki_Science_Competition. Thank you.--Alexmar983 (talk) 07:43, 17 September 2017 (UTC)
Important message for file movers[edit]
A community discussion has been closed where the consensus was to grant all file movers the suppressredirect user right. This will allow file movers to not leave behind a redirect when moving files and instead automatically have the original file name deleted. Policy never requires you to suppress the redirect, suppression of redirects is entirely optional.
Possible acceptable uses of this ability:
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Please note, this ability should be used only in certain circumstances and only if you are absolutely sure that it is not going to break the display of the file on any project. Redirects should never be suppressed if the file is in use on any project. When in doubt, leave a redirect. If you forget to suppress the redirect in case of file name vandalism or you are not fully certain if the original file name is actually vandalism, leave a redirect and tag the redirect for speedy deletion per G2.
The malicious or reckless breaking of file links via the suppressredirect user right is considered an abuse of the file mover right and is grounds for immediate revocation of that right. This message serves as both a notice that you have this right and as an official warning. Questions regarding this right should be directed to administrators. --Majora (talk) 21:35, 7 November 2019 (UTC)
File:FET Armstrong oscillator.svg error[edit]
Hello Chetvorno. I think the picture FET Armstrong oscillator.svg has a little error. The dot next to L2 should be next to the bottom of L2, not next to the top. This dot shows how the windings are wired. With a source circuit, output signal is phase-reversed to input signal. The wiring top of L1 is next to bottom of L2 phase-reverses the signal, too. Two phase-reversals are the same as no phase-reversal and the oscillator oscillates. Please fix the picture AndreAdrian (talk) 09:05, 4 December 2019 (UTC)
Superhet image[edit]
Looking at image:
I believe the image called Mixer input (and thus output as well) is incorrect.
According to the filter function in RF filter, S1 should be left at the original strength, while the larger signal to its left should be reduced by some 60 to 70% of its original stength. Likewise, the other signals in the RF range around S1 should also be much smaller by the time they get to the mixer.
Maury Markowitz (talk) 11:25, 22 May 2020 (UTC)
- Darn, I was hoping no one would notice that. After I drew the RF filter characteristic and the rest of the drawing, I realized that as you say the outlier signals at the ends would have to be shrunk 60%. This is just due to the unrealistically wide frequency separation of the signals I showed on the graph; in a real superhet I think the RF filter is far too broad to play any significant role in bandpass filtering, it is just there to filter out the image frequency. I didn't want to give readers this erroneous impression, so I attenuated those end signals some, maybe 30%, but not as much as they should have been. Ok, I'll fix it. Thanks Chetvorno (talk) 15:18, 21 July 2021 (UTC)
A barnstar for you![edit]
|
The Graphic Designer's Barnstar |
| Thanks for providing a diagram for electronic band structure! Ciderpoem (talk) 08:20, 4 May 2021 (UTC) |
- @Ciderpoem: A much delayed thank you! Sorry, my wikitime has been chaotic this year. This is the first barnstar I've ever gotten, I'll cherish it. Cheers and happy holidays Chetvorno (talk) 01:25, 11 December 2021 (UTC)
|
File:Transmitter tank inductor.jpg has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry.
If you created this file, please note that the fact that it has been proposed for deletion does not necessarily mean that we do not value your kind contribution. It simply means that one person believes that there is some specific problem with it, such as a copyright issue. Please see Commons:But it's my own work! for a guide on how to address these issues. |
— billinghurst sDrewth 08:30, 21 July 2021 (UTC)
Ummmmm[edit]
Can you use a Crystal Radio with multiple Antenna to generate enough power to set off a PMT device and Tesla Coil. 12.202.76.50 05:08, 25 July 2022 (UTC)
Round 1 of Picture of the Year 2022 voting is open![edit]
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Dear Wikimedian,
Wikimedia Commons is happy to announce that the 2022 Picture of the Year competition is now open. This year will be the seventeenth edition of the annual Wikimedia Commons photo competition, which recognizes exceptional contributions by users on Wikimedia Commons. Wikimedia users are invited to vote for their favorite images featured on Commons during the last year (2022) to produce a single Picture of the Year.
Hundreds of images that have been rated Featured Pictures by the international Wikimedia Commons community in the past year are all entered in this competition. These images include professional animal and plant shots, breathtaking panoramas and skylines, restorations of historical images, photographs portraying the world's best architecture, impressive human portraits, and so much more.
For your convenience, we have sorted the images into topical categories. Two rounds of voting will be held: In the first round, you may vote for as many images as you like. The top 30 overall and the two most popular images in each category will continue to the final. In the final round, you may vote for just three images to become the Picture of the Year.
Round 1 will end on UTC.
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Delivered by MediaWiki message delivery (talk) 09:14, 20 April 2023 (UTC)
File:Onde electromagnetique.svg[edit]
@Chetvorno: Greetings. This image is the lede image on "Electromagnetic radiation" but Wikipedia is not picking it up as the Page image because width/height > 2. Would you consider modifying this image so that W/H <= 2? Constant314 (talk) 00:03, 13 December 2023 (UTC)
