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This article is surreptitious advertising and not a scientific paper! Take this page with a pinch of salt!
It is also highly limited in scope; to medical imaging. 192.25.144.225 15:32, 5 May 2006 (UTC)
Advertising? How? Yes, the wording is a bit strange in places, and it is overly concerned with medical matters, but I don't see any advertising. Crooks and Coolidge aren't collecting revenues any more, and haven't been for some decades. -- Speedevil 11:47, 6 September 2007 (UTC)
This page suffers from horrible duplication. Much of the comment on each variant tube is simple rewording of the others. -- Speedevil 12:34, 17 September 2007 (UTC)
Under this heading is: "CRT's running at 30 to 40 kV"...They run at about 15-20 kV. Substantial X-rays aren't produced until 40 kV is dropped between the anode-cathode. Even then, most glass had lead in it, and few X-rays would be emitted unless cathode current was high. A rectifier tube usually runs in a saturation region--high filament/cathode current--and, hence, the potential drop is usually only a few kV. Otherwise, the rectifiers wouldn't be efficient. 68.231.189.108 ( talk) 15:01, 16 October 2009 (UTC)
It is not clearly stated, that Röntgen used a Crookes' Tube when he discovered X-rays. In fact, he stated in his very first letter here, that all kinds of discharge tube are equally suited. Dschoni ( talk) 17:09, 30 March 2017 (UTC)
You picture is of an early; self-rectified, vacuum-regulated X-Ray tube; not a Crookes' tube. They are pear-shaped, with only two electrodes. 68.231.189.108 ( talk) 15:12, 16 October 2009 (UTC)
Also, you mentioned X-Ray power supplies were "rectified high-voltage transformers" (until switching power supplies became more practical/affordable with solid state devices.)Rectified hi-voltage was used, for a short while, but then most tubes went to beefier electrodes to become the "Self-rectified" type. Unless for very high currents, these are still generally used for exposures of one second or less. 68.231.189.108 ( talk) 15:12, 16 October 2009 (UTC)
I am not an expert and don't want to put misinformation in the article if I'm wrong. But I think the first caption has "left" and "right" mixed up. If someone more knowledgeable could look at this I would be greatful. Specifically, I think:
Coolidge X-ray tube, from early 1900s. The heated cathode is on the right, and the anode is left. The X-rays are emitted downwards.
should be
Coolidge X-ray tube, from early 1900s. The heated cathode is on the left, and the anode is right. The X-rays are emitted downwards.
207.172.220.9 ( talk) 22:41, 20 January 2008 (UTC)
Hi, it will be a great value add for having a section covering Grid Controlled X-ray tubes in this article. This technique is useful in reducing continuous X-ray dosage to patients in Fluoroscopy. I will be grateful if someone knowledgeable looks into this. — Preceding unsigned comment added by SirajIssani ( talk • contribs) 05:29, 19 March 2011 (UTC)
What is the purpose of the rotating anode type? Probably it's a better thermal restistance, but it is not mentioned. So we rather should explain the benefits of this setup, then how a induction motor works. 46.5.54.206 ( talk) 17:20, 14 December 2015 (UTC)
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![]() | This article is rated C-class on Wikipedia's
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|
This article is surreptitious advertising and not a scientific paper! Take this page with a pinch of salt!
It is also highly limited in scope; to medical imaging. 192.25.144.225 15:32, 5 May 2006 (UTC)
Advertising? How? Yes, the wording is a bit strange in places, and it is overly concerned with medical matters, but I don't see any advertising. Crooks and Coolidge aren't collecting revenues any more, and haven't been for some decades. -- Speedevil 11:47, 6 September 2007 (UTC)
This page suffers from horrible duplication. Much of the comment on each variant tube is simple rewording of the others. -- Speedevil 12:34, 17 September 2007 (UTC)
Under this heading is: "CRT's running at 30 to 40 kV"...They run at about 15-20 kV. Substantial X-rays aren't produced until 40 kV is dropped between the anode-cathode. Even then, most glass had lead in it, and few X-rays would be emitted unless cathode current was high. A rectifier tube usually runs in a saturation region--high filament/cathode current--and, hence, the potential drop is usually only a few kV. Otherwise, the rectifiers wouldn't be efficient. 68.231.189.108 ( talk) 15:01, 16 October 2009 (UTC)
It is not clearly stated, that Röntgen used a Crookes' Tube when he discovered X-rays. In fact, he stated in his very first letter here, that all kinds of discharge tube are equally suited. Dschoni ( talk) 17:09, 30 March 2017 (UTC)
You picture is of an early; self-rectified, vacuum-regulated X-Ray tube; not a Crookes' tube. They are pear-shaped, with only two electrodes. 68.231.189.108 ( talk) 15:12, 16 October 2009 (UTC)
Also, you mentioned X-Ray power supplies were "rectified high-voltage transformers" (until switching power supplies became more practical/affordable with solid state devices.)Rectified hi-voltage was used, for a short while, but then most tubes went to beefier electrodes to become the "Self-rectified" type. Unless for very high currents, these are still generally used for exposures of one second or less. 68.231.189.108 ( talk) 15:12, 16 October 2009 (UTC)
I am not an expert and don't want to put misinformation in the article if I'm wrong. But I think the first caption has "left" and "right" mixed up. If someone more knowledgeable could look at this I would be greatful. Specifically, I think:
Coolidge X-ray tube, from early 1900s. The heated cathode is on the right, and the anode is left. The X-rays are emitted downwards.
should be
Coolidge X-ray tube, from early 1900s. The heated cathode is on the left, and the anode is right. The X-rays are emitted downwards.
207.172.220.9 ( talk) 22:41, 20 January 2008 (UTC)
Hi, it will be a great value add for having a section covering Grid Controlled X-ray tubes in this article. This technique is useful in reducing continuous X-ray dosage to patients in Fluoroscopy. I will be grateful if someone knowledgeable looks into this. — Preceding unsigned comment added by SirajIssani ( talk • contribs) 05:29, 19 March 2011 (UTC)
What is the purpose of the rotating anode type? Probably it's a better thermal restistance, but it is not mentioned. So we rather should explain the benefits of this setup, then how a induction motor works. 46.5.54.206 ( talk) 17:20, 14 December 2015 (UTC)
Hello fellow Wikipedians,
I have just added archive links to 2 external links on
X-ray tube. Please take a moment to review
my edit. If necessary, add {{
cbignore}}
after the link to keep me from modifying it. Alternatively, you can add {{
nobots|deny=InternetArchiveBot}}
to keep me off the page altogether. I made the following changes:
When you have finished reviewing my changes, please set the checked parameter below to true to let others know.
An editor has reviewed this edit and fixed any errors that were found.
Cheers.— cyberbot II Talk to my owner:Online 14:37, 8 January 2016 (UTC)
Hello fellow Wikipedians,
I have just added archive links to one external link on
X-ray tube. Please take a moment to review
my edit. If necessary, add {{
cbignore}}
after the link to keep me from modifying it. Alternatively, you can add {{
nobots|deny=InternetArchiveBot}}
to keep me off the page altogether. I made the following changes:
When you have finished reviewing my changes, please set the checked parameter below to true to let others know.
An editor has reviewed this edit and fixed any errors that were found.
Cheers.— cyberbot II Talk to my owner:Online 12:58, 10 February 2016 (UTC)