File:Leutz Phantom 9 tube TRF receiver.jpg
Leutz_Phantom_9_tube_TRF_receiver.jpg (657 × 332 pixels, file size: 56 KB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionLeutz Phantom 9 tube TRF receiver.jpg |
English: Top view of the Leutz Transoceanic "Phantom" radio receiver with its cover removed, from 1927. Leutz, C.R., Inc was an American maker based in Altoona PA and/or New York, active in 1921-1931 [1]. The "Phantom" was a 9 tube tuned radio frequency (TRF) receiver, with 4 tuned radio frequency stages, a grid leak detector stage, and 4 audio amplifier stages. The organization of the receiver is obvious from the layout of the parts. The 4 TRF and one detector stages are visible in the shielded compartments from right to left. Visible in each compartment is the triode vacuum tube, the air core interstage coupling transformer, and the variable capacitor which forms the tuned circuit. The 4 audio amplifier tubes are in the righthand compartment. The capacitor for each of the 5 tuned stages is adjusted by a dial on the front panel. To make tuning easier, the capacitors can also be connected together mechanically (ganged) with the horizontal shaft running through the compartments, so they can be tuned together. The meter and two rheostat knobs at the right end of the panel control the filament currents. With plugin coils the receiver can cover the range from 3600 to 35 meters wavelength (83 kHz to 8.6 MHz). Caption: "THE SHIELDED COMPARTMENTS OF THE RECEIVER - At right are the four low frequency stages in one compartment. The four high frequency stages and the detector stage, each in a separate compartment, are seen to the left of the low frequency compartment. Note also the common shaft of the rotors of the tuning condensers" |
Date | |
Source | Retrieved July 27, 2014 from Popular Radio magazine, published by Popular Radio, Inc., New York, Vol. 11, No. 6, June 1927, p. 559 on AmericanRadioHistory.com website. |
Author | Unknown authorUnknown author |
Permission (Reusing this file) |
This 1927 issue of Popular Radio magazine would have the copyright renewed in 1955. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. [2] Search of the Renewals for Periodicals for 1954, 1955, and 1956 show no renewal entries for Popular Radio. Therefore the magazine's copyright was not renewed and it is in the public domain. |
Licensing
[edit]Public domainPublic domainfalsefalse |
This work is in the public domain 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 copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), 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. العربية ∙ Deutsch ∙ English ∙ español ∙ français ∙ galego ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ português ∙ português do Brasil ∙ русский ∙ sicilianu ∙ slovenščina ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/− |
Annotations InfoField | This image is annotated: View the annotations at Commons |
1st tuned radio frequency (TRF) stage
2nd tuned radio frequency (TRF) stage
3rd tuned radio frequency (TRF) stage
Triode vacuum tube
Interstage coupling transformer
Variable tuning capacitor
4th tuned radio frequency (TRF) stage
Grid leak detector stage
4 stage audio amplifier
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 10:25, 24 August 2014 | 657 × 332 (56 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org