52 p. ; 19 cm
Topic: Telegraphy
24
24
Mar 3, 2021
03/21
by
Russell, P. J.
texts
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Topics: Telegraphy, MinistryOfCulture
20
20
Mar 2, 2021
03/21
by
The Director-General of Telegraphs; Stow, Ben J.
texts
eye 20
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Topics: Telegraphy, MinistryOfCulture
54
54
Jul 15, 2021
07/21
by
Elmer E. Bucher, Jeff Behary
texts
eye 54
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Practical Wireless Telegraphy by Elmer E. Bucher
Topics: Wireless Telegraphy, Marconi, Tesla Coils, Radio, Telegraphy
California Digital Library
1,141
1.1K
Jun 27, 2007
06/07
by
United States. Army. Signal Corps
texts
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128 p. 25 cm
Topic: Telegraphy, Wireless
Topics: Telegraphy, Address registration.
The author has already referred to the standardisation of the perikon detector, for the same conditions of frequency and coupling, by comparison with a thermo-element. He now makes use of this arrangement, a galvanometer of 2000 ohms' resistance and sensitiveness 1.28*10/sup -9/ amp being used with the dector. In the following table are given the received current and received energy, measured in this way for various sending stations, the measurements being made at the U.S. Naval Wireless...
Topic: radiotelegraphy/ B6210F Telegraphy
Microfilm
Topic: United Wireless Telegraphy Company
7
7.0
Jun 10, 2021
06/21
by
(tskauli)
data
eye 7
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This is a compact 3D-printed manual Morse key. The design offers precise movement with adjustable force and travel, in a very simple 3D-printed design. Compact and lightweight, the key is suitable for portable use. There is a choice of different knob shape options (according to parameter "knobtype" in the code). The default type is the most mature design. The key design is parametric so that dimensions can be varied to suit different tastes. It is also easy to adjust the code to...
Topics: thingiverse, Electronics, telegraphy, stl
Longitudes of some of the principal places in Canada by electric telegraph. Published in the Nautical Magazine Volume 29 Pages 1-11
Topics: Longitude, Wireless telegraphy, Canada
Source: Google Books
Topics: Telegraphy, Change of address.
347
347
Mar 8, 2015
03/15
by
Heilbrun, Richard
texts
eye 347
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Mode of access: Internet
Topics: bub_upload, Telegraphy, Telephone
Source: http://books.google.com/books?id=oIRRAAAAMAAJ&hl=&source=gbs_api
CHAPTER 1. FUNDAMENTAL ELECTRICAL THEORY Electrical Circuits CHAPTER 2. SHORT HISTORY OF RADIO, WITH REFERENCE TO ARC RADIO TRANSMITTERS. First Radio System. CHAPTER 3. THE ARC RADIO TRANSMITTER. General Arc System. CHAPTER 4. TYPES OF ARC RADIO TRANSMITTER. CHAPTER 5. DEVELOPMENT OF ARC RADIO COMMUNICATION. PART II. CHAPTER 1. FEDERAL ARC RADIO TRANSMITTERS. CHAPTER 2. DETAILED DESCRIPTION OF 2 KW. AND 5 KW. FEDERAL ARC RADIO TRANSMITTERS. CHAPTER 3. 2 KW. AND 5 KW. ARC CONVERTER UNIT—...
Topics: Radio, Telegraphy -- Handbooks, Manuals, Etc, Telegraphy, Arc Transmitter, Telegraph, Wireless,...
Tissot has already pointed out the advantages of high spark-frequency when thermal detectors are employed. The author demonstrates that a high spark-frequency is also advantageous from the point of view of the telephone receiver. Rayleigh's and Wien's results are quoted as showing the rapid increase of sensitiveness with the frequency, and a curve of volt-sensitiveness is given for a pair of 800-ohm Schmidt-Wilckes head telephones of the type used for radio-telegraphic work. The change in...
Topics: radiotelegraphy, acoustics, Telephony B6210F Telegraphy
58
58
Oct 3, 2019
10/19
by
United States. Army. Signal office. [from old catalog]
texts
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favorite 0
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203, [1] p. 22 cm
Topics: Storms, Weather telegraphy, Weather signals
Digitized by Google.
Topics: Cipher and telegraph codes, Telegraphy
v, 95 p. incl. diagrs., forms. 21 cm
Topics: Telegraphy -- Operators' manuals, Railroads -- Telegraph
How to Construct an Efficient Wireless Telegraph
Topics: wireless, telegraphy, coherer, sounder, relay, tapper, armature, filings, circuit, apparatus,...
Digitized by Google.
Topics: Telegraph, Electricity, Stars, Electricity, 1859, Telegraphy
52
52
movies
eye 52
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Bioscoopjournaals waarin Nederlandse onderwerpen van een bepaalde week worden gepresenteerd. De Rijkstelegraaf bestaat 100 jaar. In Den Haag is, tgv dit feit, een tentoonstelling ingericht over berichtenverkeer vroeger en nu. SHOTS: - Een gelukstelegram wordt aangeboden bij een loket in een postkantoor, waarna een telegrafiste de tekst uittypt op een telegraaf; uit de zijkant van de machine rolt een smalle papierstrook met de gedrukte tekst; - int. tentoonstellingszaal: op de muur een kopie van...
Topic: telegrafie, jubilea, tentoonstellingen, telegraphy, jubilees, exhibitions
Source: BG_34107
…
Topics: fay sholes, typewriter, speed typing, telegraphy
How To A Become Wireless Operator: A Practical Presentation Of The Theory Of Electrical Waves, Their Propagation, And Their Adaptation To Wireless Communication, Including Simple And Clear Instructions How To Operate Wireless Devices And How To Comply With Government Requirements For Operators CONTENTS Fundamentals of wireless telegraphy 1 Discovery of electric waves 1 Essentials of wireless method 3 Nature of waves 5 Elementary electrical principles 7 Static and current electricity 7 Potential...
Topics: Telegraph, Wireless, Telegraphy, Radio, Telegraph, Wireless
At head of title: W.B. no. 1005. United States Department of agriculture. Weather bureau
Topics: Cipher and telegraph codes, Weather telegraphy
ii, 14 pages : 30 cm
Topics: Cipher and telegraph codes, Weather telegraphy
Digitized by Google.
Topics: Telegraph -- Periodicals, Telegraphy, Telegraph, Telephone, Morse Code
20
20
Apr 12, 2021
04/21
by
Jeff Behary
texts
eye 20
favorite 1
comment 0
For Induction Coil / Wireless Telegraphy
Topics: Wireless Telegraphy, Induction Coil, Mercury Turbine Interrupter
"La T.S.F. [telegrafia senza fili] per quelli che sanno e quelli che non sanno – Teoria e costruzione", seconda edizione
Topics: libro, radiotecnica, telegrafia, book, radio engineering, telegraphy
43
43
Apr 12, 2021
04/21
by
Jeff Behary
texts
eye 43
favorite 0
comment 0
Quenched Spark Gap for Wireless Telegraphy
Topics: Quenched Spark Gap, Undamped Oscillations, Wireless Telegraphy
Telegraph Age, Vol. XXIV, 1906
Topics: Telegraph -- Periodicals, Morse Code, Telephone, Telegraph, Telegraphy
The relation between the energy of oscillation in two coupled circuits and the coefficient of coupling is investigated. The primary aircraft is excited by means of a vibrator worked by an electromagnet, and this circuit excites the two coupled circuits under observation. The arrangement is taken as representing a sender and a receiving circuit with a detector circuit coupled to it. It is the energy relations in the last two which are studied. A Pt-Te thermo-couple or a zincite-chalcopyrite...
Topics: radiotelegraphy, oscillations and waves (electric)/ B6210F Telegraphy
This paper refers to experiments carried out daring 1909-1910 between the Fesscnden high-power station at Brant Hock and the U.S. cruisers /b Birmingham/ and /b Salem/. A series of experiments enabled data to be obtained as to the laws governing the radiation and reception of electric waves, and the subject of atmospheric absorption up to a distance of 1000 miles to be studied. At Brant Rock 50 to 60 kw. were employed, the two ships' stations being equipped with 10-kw. 500-~ motor-generators. A...
Topics: radiotelegraphy, oscillations and waves (electric)/ B6210F Telegraphy
867
867
Oct 28, 2008
10/08
by
Heilbrun, Richard
texts
eye 867
favorite 0
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Book digitized by Google from the library of University of Wisconsin - Madison and uploaded to the Internet Archive by user tpb.
Topics: Telegraphy -- Handbooks, manuals, etc, Telephone -- Handbooks, manuals, etc
Source: http://books.google.com/books?id=oIRRAAAAMAAJ&oe=UTF-8
"Il centro radiotelegrafico di Coltano", serie "Pubblicazioni dell'Istituto Elettrotecnico e Radiotelegrafico della R. Marina" n° 28. Estratto da "L'elettrotecnica", vol. 11, n° 1 e 2, 5-15 gennaio 1924.
Topics: libro, radiotecnica, telegrafia, Coltano, book, radio engineering, telegraphy
4
4.0
Apr 27, 2021
04/21
by
Jam Miller (OldManJohnson)
data
eye 4
favorite 0
comment 0
Alfred Vail made this key in 1844, believed to be from the first Baltimore-Washington telegraph line, as an improvement on Samuel Morse's original transmitter. My model is based on a 3D scan of the original key from the Smithsonian 3D Digitization web site. It can be seen and downloaded here : https://3d.si.edu/object/3d/morse-vail-telegraph-key:ed99f44d-3c60-4111-b666-e2908e1b64ef The only parts of the model that are not 3D printed are (2) 5mm x 20 bolts and nuts for the upper adjustment...
Topics: thingiverse, Models, stl, telegraph, telegraphy, Smithsonian, Samuel Morse
LibriVox recording of The National Geographic Magazine Vol. 07 - 03. March 1896 by Various. Read in English by Rapunzelina; MaryAnnS; Phil Schempf; BettyB The National Geographic Magazine, an illustrated monthly, the March Number. It includes the following articles: The So-Called Jeannette Relics, by Professor William H. Dall Nansen's Polar Expedition, by General A. W. Greely The Submarine Cables of the World, by Gustave Herrle Peter Cooper and Submarine Telegraphy The Russo-American Telegraph...
Topics: librivox, audiobooks, Nansen, polar expedition, telegraphy, indian territory
Queen's University Library
315
315
Jul 30, 2013
07/13
by
Dominion School of Telegraphy and Railroading
texts
eye 315
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40 p. : ill., ports. ; 23 cm
Topics: Dominion School of Telegraphy and Railroading, Railroads, Telegraphers
Folkscanomy Miscellaneous
99
99
Jan 16, 2020
01/20
by
G. Pession; G. Montefinale; A. Marzoli
texts
eye 99
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"Il centro radiomarittimo di Coltano (1929-1932) – Comunicazione alla XXXVII riunione annuale dell'A.E.I., Firenze 25 settembre - 1° ottobre 1932". Alla scansione sono allegati un articolo più recente di una rivista non indentificata e due foto (vedi JPEG) della Palazzina Marconi in stato di abbandono.
Topics: libro, radiotecnica, telegrafia, Coltano, book, radio engineering, telegraphy
The experiments were made with a buzzer as transmitter, capable of giving wave-lengths from 350 m to over 2000 m. The chalcopyrite-zincite (perikon) detector was used as a standard for comparison, measurements showing that the deflections obtained with this detector are proportional to the squares of the oscillatory currents as measured by thermo-element. For the comparison of detectors of other types with the perikon, the shunted telephone method and the variable coupling method were used....
Topics: radiotelegraphy, measurements and use of instruments, Telephony B6210F Telegraphy
8
8.0
Jun 20, 2021
06/21
by
(tskauli)
data
eye 8
favorite 0
comment 0
This design is for two different versions of 3D-printed iambic paddles for sending Morse code. The design is simple, but provides precise movement with adjustable force and travel. Design features include printed rocker hinges, force adjustment by a sliding spring, travel adjustment using a modified screw, ergonomic grip and general simplicity and precision. The design is compact and well suited for portable use. The design can be tuned or modified by changing the OpenSCAD code, for example to...
Topics: morse, morse_key, NSFW, thingiverse, key, telegraphy, Electronics, stl
49
49
Apr 12, 2021
04/21
by
Radicon, Frank Jones, Jeff Behary
texts
eye 49
favorite 0
comment 0
Instructions for spark gap transmitter remote control bus from Japan, 1950s. The first true "remote control" toy.
Topics: Radicon, Bus, Remote Control, Coherer, Spark Gap, Telegraphy, Nikola Tesla
"Elementi di telegrafia senza filo – Ad uso del dilettante", collana "Biblioteca del popolo" n° 602.
Topics: libro, radiotecnica, telegrafia, book, radio engineering, telegraphy, Biblioteca del popolo
9
9.0
Jan 5, 2021
01/21
by
Scott Baker (scottbaker)
data
eye 9
favorite 0
comment 0
This thing is a 3D-printed lightweight Morse code straight key suitable for portable (QRP) amateur radio operation. It uses 5mm diameter a 2mm thick neodymium magnets for spring force. To build this thing you will need to purchase one 3.5mm stereo jack**, four M3x10mm screws and two m3x18mm screws. This project requires wiring and soldering to connect key to the stereo jack. Refer to the provided wiring diagram. ** Note: stereo jacks come in all shapes and sizes. The stereo jack used here has a...
Topics: Telegraphy, stl, Morse Code, thingiverse, Morse Key, Ham Radio, Qrp, Electronics
One of the earliest radio manuals produced for the US Army, 1909, though it had limited circulation. Prepared by Lt. George A Wieczorek to teach wireless telegraphy, specifically at the station at Fort Wood, New York.
Topics: United States Signal Corps, wireless telegraphy, Wieczorek, Signal Corps Manuals, radio history
"Guglielmo Marconi e la telegrafia senza fili", collana "Biblioteca del popolo - Gli uomini illustri" n° 358.
Topics: libro, Guglielmo Marconi, biografia, telegrafia, radio, book, biography, telegraphy, Biblioteca del...
Bell System Technical Journal, 29: 3. July 1950 pp 468. Contributors to this Issue.
Topics: telephone, bell, hartley, electrical, yale, engaged, telegraphy, waveguide, dielectric, boolean,...
6
6.0
Mar 19, 2021
03/21
by
Ro So (Lord_Scorpion)
data
eye 6
favorite 0
comment 0
version for good one printers
Topics: Qrp, qrp pixie, telegraphy, QRP_transceiver, thingiverse, Engineering, pixie, ham radio, stl
LibriVox recording of Short Nonfiction Collection, Vol. 046 by Various. Read by LibriVox Volunteers Twenty short nonfiction works in the public domain, independently chosen by the readers. Topics include meteor showers, smallpox inoculation, telegraphy, fear of death, church bell change-ringing , painting as a pastime, prejudice against Jews from Mark Twain's perspective, the view from Braddock Heights, Maryland, philosophical reflections by Saint Bonaventure, Paracelsus, and Friedrich Jacobi,...
Topics: librivox, audiobooks, twain, death, Jews, painting, telegraphy, meteors, synteresis, smallpox,...
Morsum Magnificat Issue 32 February 1994
Topics: morse, wireless, code, radio, operator, marconi, telegraphy, wpm, operators, wireless telegraphy,...
842
842
May 19, 2008
05/08
by
Fahie, John Joseph
texts
eye 842
favorite 2
comment 0
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Topics: electric, telegraphy, wire, telegraph, history, wires, needle, experiments, davy, electricity,...
Source: http://books.google.com/books?id=0Mo3AAAAMAAJ&oe=UTF-8
Morsum Magnificat Issue 64 July 1999
Topics: morse, telegraph, code, wireless, navy, radio, telegraphy, dashes, morsum, signal, morse code, navy...
