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plate. The
Barkhausen-Kurz was the first tube that could oscillate in the UHF range, and by the mid 30s could generate microwave frequencies. It was the only source of microwaves until the klystron was invented. The output frequency is determined by the geometry of the tube and the 4 cm half-wave antenna soldered directly to the grid terminal. The tubes and antennas are mounted at the focus of parabolic reflectors which are pointed at each other. In the receiver the Barkhausen-Kurz tube is operated below oscillation as an amplifier
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mode for both transmitting and receiving. In
Barkhausen-Kurz mode the plate is biased near zero voltage while the grid is biased at a high positive voltage. The electrons oscillate back and forth through the grid, attracted by the grid and repelled by the low voltages on both the cathode and
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296:), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
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magazine would have the copyright renewed in 1966. Online page scans of the
Catalog of Copyright Entries, published by the US Copyright Office can be found
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because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the
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This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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If the file has been modified from its original state, some details may not fully reflect the modified file.
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The following pages on the
English Knowledge (XXG) use this file (pages on other projects are not listed):
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218:. Search of the Renewals for Periodicals for 1978 and later show no renewal entries for
152:. Alterations to image: Edited two images together and added label pointing out B-K tube
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182:. The source said it was based on an article in a recent issue of the French magazine
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for US works (depending on the date of the author's death), such as Canada (70 years
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Note that it may still be copyrighted in jurisdictions that do not apply the
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magazine, Popular Book Corp., New York, Vol. 8, No. 9, January 1938, p. 476
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Click on a date/time to view the file as it appeared at that time.
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but there is no indication that the images were from that magazine
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Add a one-line explanation of what this file represents
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C. W. Palmer, "Transmitting and receiving on 15 cm" in
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Commons is a freely licensed media file repository.
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116:Barkhausen-Kurz xmtr & rcvr 1938.png
52:Barkhausen-Kurz_xmtr_&_rcvr_1938.png
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278:. For further explanation, see
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170:Retrieved March 30, 2015 from
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479:Flag of the United States
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220:Short-Wave and Television
212:Short-Wave and Television
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873:利用者:加藤勝憲/バルクハウゼン - クルツ管
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81:. Information from its
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84:description page there
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927:20:36, 30 March 2015
853:لامپ بارکهاوزن-کوتز
835:Barkhausen–Kurz tube
630:determination method
280:Commons:Hirtle chart
266:This work is in the
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404:português do Brasil
210:This 1938 issue of
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766:File history
550:January 1938
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161:January 1938
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92:You can help
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22:File history
431:slovenščina
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132:transmitter
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230:Licensing
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123:English:
58:image/png
881:Metadata
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37:Metadata
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178:on
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130:AM
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
