КНИГИ НА АНГЛИЙСКИЙ ЯЗЫКЕ, ИМЕЮЩЕЕ ОТНОШЕНИЕ К СЛОВУ «SPARK TRANSMITTER»
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The 201-A. I Home of the League Where can I get information on the American
Radio Relay League? — Stanley Wauchope, Jr. American Radio Relay League,
Hartford, Conn. Sparks Not in Favor Can amateurs use a spark transmitter with a
...
2
The Worldwide History of Telecommunications
Wien's squenched spark transmitter, which increased the efficiency of the
transmitter and enabled the generation of higher frequencies. and Braun's crystal
detector became the basis for the radio equipment produced by Telefunken.
Instead of ...
3
Encyclopedia of 20th-Century Technology
No designer, however, could overcome the spark transmitter's inherent noisiness
in order to make radio telephony practical. Spark transmitter designs did
eventually make radio telegraphy practical. In 1897, Marconi secured a patent in
Great ...
Colin Hempstead, William Worthington, 2004
4
Syntony and
Spark: The Origins of Radio
What this meant in practice was that it was inherently impossible to tune a spark
transmitter to a single frequency. The damping factor could be reduced by
various means and (as was later learned) resonant circuits could be inserted
between ...
Two- Circuit Spark Transmitter A type of transmitter which is preferred to that of
Fig. 31 is shown in Fig. 32. It also depends upon the condenser discharge for
generation of radio frequency current in the antenna. Here a condenser C
receives ...
The pitch of the tone will depend upon the spark frequency; if a spark transmitter
having 120 cycle power supply is used, with one spark per half- cycle, 240 sparks
per second will be produced and the signal tone will sound slightly lower than ...
7
Project Mapole (magnetic Dipole
Spark Transmitter).
The report describes theoretical and experimental work on the development of a VHF high-power closed-ring spark transmitter, a device theoretically capable of producing gigawatt peak powers in the nanosecond pulse-length region.
Marcel P. Fraser, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB., 1967
8
The Artist as Producer: Russian Constructivism in Revolution
Despite constant improvements to the technology of spark-gap transmission, two
problems cannot be entirely eliminated. First, the spark-transmitted signal is
unsuitable for the transmission of the human voice since the spark transmitter
sends ...
Fessenden had realized, as we have already noted previously, that the stop and
go system, the spark transmitter, was incapable of transmitting satisfactorily voice
and music. A means of sending and receiving continuous waves was required.
T. K. Sarkar, Robert Mailloux, Arthur A. Oliner, 2006
... which we may call Class I. This class includes practically all of the numerous
variations of spark and buzzer sending arrangements; and the class may be
subdivided by reason of the particular characteristics of each form of spark
transmitter.
НОВОСТИ, В КОТОРЫХ ВСТРЕЧАЕТСЯ ТЕРМИН «SPARK TRANSMITTER»
Здесь показано, как национальная и международная пресса использует термин
spark transmitter в контексте приведенных ниже новостных статей.
Spark transmitter on BBC TV
At 4:05 into the show there is a brief explanation of how radio beacons are used to track sharks, but the highlight of the show is at 18:18 when Ellie Harrison ... «Southgate Amateur Radio Club, Июл 15»
Amateur Radio Special Events to Mark International Marconi Day:
The VPC suffix recalls the call sign of the Marconi spark transmitters in Stanley. The 150 kW transmitter built in 1915 fed seven 305-foot masts and operated on ... «eHam.net, Апр 15»
NPR's 'All Things Considered' Segment Includes Spark Gap Morse …
The ARRL Lab has a working spark transmitter, so Kutzko got the desired text from NPR, which he sent by hand and recorded. "They said it was 'perfect,'" he ... «eHam.net, Мар 14»
Curious street with transmitter mast and gun emplacements
A 2.5 kilowatt spark transmitter provided a wireless telegraph service to ships within ... These days the site of the former transmitter is called Te Ahumairangi Hill. «The Dominion Post, Янв 14»
How Transmitter Power Supplies Evolved
Actually, the power supply of a modern radio transmitter is probably one of the ... The fully charged batteries alone could power the spark transmitter for quite ... «Radio World, Янв 11»
“Coming Home” to HamJam 2010
Hal Kennedy, N4GG, supplied the other historical bookend with a description and demonstration of his authentic recreation of a spark transmitter, known as ... «ARRL, Ноя 10»
