英語でSPARK TRANSMITTERはどんな意味ですか？
スパークギャップトランスミッタ
スパークギャップトランスミッタは、スパークギャップを用いて高周波電磁波を発生させる装置である。 これらの装置は、最初の30年間無線のほとんどの無線電信システムの送信器として機能し、実用的な無線の最初のデモは、それらを使用して実行されました。 その後、高速Alexandersonオルタネータや静的Poulsen Arcジェネレータのような回転機械をベースにして、やや効率的なトランスミッタが開発されましたが、スパークトランスミッタは依然としてほとんどのオペレータに好まれていました。 これは、複雑でない設計のためであり、電信キーが解放されたときに運送業者が停止したため、オペレータは応答を「聴く」ことができました。 他のタイプの送信機では、キャリアを容易に制御することができず、キャリアを変調し、送信機の漏れが受信機の感度を低下させないようにするための精巧な手段が必要であった。 第一次世界大戦後、これらの問題を克服した真空管をベースとした大幅に改良されたトランスミッターが利用可能になり、1920年代後半には、
英語辞典でのspark transmitterの定義
ディクショナリにおけるスパーク送信機の定義は、スパークギャップと直列にインダクタを介してキャパシタを放電することによって電力が生成される初期のタイプの無線送信機である。
«SPARK TRANSMITTER»に関連する英語の本
以下の図書目録から
spark transmitterの使いかたを見つけましょう。
spark transmitterに関する本と英語文献で使われた文脈を提供するための簡単な抜粋文。
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.
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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, 7月 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, 4月 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, 3月 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, 1月 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, 1月 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, 11月 10»