ಮೂಲ ಕಡತ (೫೨೧ × ೬೭೩ ಚಿತ್ರಬಿಂದು, ಫೈಲಿನ ಗಾತ್ರ: ೬೮ KB, MIME ಪ್ರಕಾರ: image/jpeg)

ಸಾರಾಂಶ

ವಿವರ
English: A UHF transmitter from 1938 consisting of two HK-354 triode vacuum tubes in a push-pull tuned-grid tuned-plate oscillator circuit using quarter-wave parallel rod resonant stubs for tuning the grid and plate. The source says the oscillator can produce "high power" on the 2.5 meter (120 MHz) and 5 meter (60 MHz) bands. The plate rods (right) are tuned by a movable shorting strap at the end, while the grid rods (left) are shorted at the bottom and tuned by moving the grid connections up or down. The rods are 2.25 ft (69 cm) long for the 2.5 m band, and 4.5 ft for the 5 m band.
ದಿನಾಂಕ
ಆಕರ Retrieved October 12, 2014 from W. W. Smith, ed. The Radio Handbook, 5th Ed. published by Radio, Ltd., Los Angeles, 1938, p. 427, fig. 23 on American Radio History website
ಕರ್ತೃ Unknown authorUnknown author
ಅನುಮತಿ
(ಈ ಕಡತವನ್ನು ಮರುಬಳಕೆ ಮಾಡಲಾಗುತ್ತಿದೆ)
This book published in 1938 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 here. [1] Search of the Renewals for books for 1965, 1966, and 1967 show no renewal entries for The Radio Handbook. Therefore the copyright was not renewed and it is in the public domain.

ಪರವಾನಗಿ

Public domain
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.

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