चित्र:Reflex klystrons and microwave cavities.jpg
इससे बड़ा रेसोल्यूशन उपलब्ध नहीं हैं।
Reflex_klystrons_and_microwave_cavities.jpg ((418 × 275 पिक्सेल, फ़ाइल का आकार: 18 KB, MIME प्रकार: image/jpeg))
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यह फ़ाइल विकिमेडिया कॉमन्स से है। वहाँ पर इसका विवरण पृष्ठ निम्नोक्त है। कॉमन्स मुक्त लाइसेंसों के अंतर्गत उपलब्ध मीडिया फ़ाइलों का संग्रह है। आप भी इसमें मदद कर सकते हैं। |
सारांश
| विवरण |
English: Two reflex klystrons attached by waveguide to microwave cavities, from an ad by Varian, Inc. in an electronics magazine. At top is the Varian VA-1281 cavity with the VA-201 klystron, at bottom is the VA-1282 cavity and X-26 klystron. The reflex klystron is an obsolete vacuum tube used around World War 2 to produce microwaves. The microwave cavities, consisting of closed cylindrical metal containers, serve as tuned circuits, determining the resonant frequency.of the oscillators. Cavity resonators are used instead of tuned circuits at microwave frequencies because the size of discrete inductors and capacitors required would be very small. They can have much higher Q_factor than LC circuits, approaching the frequency stability of quartz crystals. |
| दिनांक | |
| स्रोत | Retrieved December 29, 2014 from Tele-Tech magazine, Caldwell-Clements Inc., New York, Vol. 14, No. 10, October 1955, p. 18 on http://www.americanradiohistory.com |
| लेखक | अनजान |
| अनुमति (इस चित्र का पुनः उपयोग करना) |
This image is from an advertisement by Varian, Inc. without a copyright notice published in a 1955 magazine. In the United States, advertisements published in collective works (magazines and newspapers) are not covered by the copyright notice for the entire collective work. (See U.S. Copyright Office Circular 3, "Copyright Notice", page 3, "Contributions to Collective Works".) Since the advertisement was published before 1978 without a copyright notice, it falls into the public domain. |
लाइसेंस
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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.
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फ़ाइलका पुराना अवतरण देखने के लिये दिनांक/समय पर क्लिक करें।
| दिनांक/समय | थंबनेल | आकार | सदस्य | प्रतिक्रिया | |
|---|---|---|---|---|---|
| वर्तमान | 12:31, 25 मई 2015 | | 418 × 275 (18 KB) | Chetvorno | User created page with UploadWizard |
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