Electrical terms explained hi-res stock photography and images

Locomotive appliances . fast, the tension spring (No. 93) may be too tight,which prevents solenoid (No. 65) from separatingcarbons sufficiently to form proper arc, or spring (No.92) may be too loose, allowing back edge of clutch(No. 44) to be jarred up and release the carbon. An oval, bent glass for the headlight case is espe-cially recommended. ELECTRICAL TERMS EXPLAINED. As there are many men who have no definite idea of what elec-tricity really is, and as a slight knowledge is necessary to properlycare for electric headlight equipment, and to get the best resultstherefrom, a few ^extracts f Stock Photo

RM2AWKK0M–Locomotive appliances . fast, the tension spring (No. 93) may be too tight,which prevents solenoid (No. 65) from separatingcarbons sufficiently to form proper arc, or spring (No.92) may be too loose, allowing back edge of clutch(No. 44) to be jarred up and release the carbon. An oval, bent glass for the headlight case is espe-cially recommended. ELECTRICAL TERMS EXPLAINED. As there are many men who have no definite idea of what elec-tricity really is, and as a slight knowledge is necessary to properlycare for electric headlight equipment, and to get the best resultstherefrom, a few ^extracts f

BY C. DE KUBICKI. Some Electrical Terms Explained. JEANTAUD ELECTRIC CAB WITH M. JEANTAUD ON THE BOX., scientific american, 1899-11-18 Stock Photo

RM2ABXJJ7–BY C. DE KUBICKI. Some Electrical Terms Explained. JEANTAUD ELECTRIC CAB WITH M. JEANTAUD ON THE BOX., scientific american, 1899-11-18

. Science of railways . of holderNo. 80Q.. If it is higher than this, there will be too muchheat onCTutchNo. 304. ,;3^1i9 foHowirig is the approximate focal point of reflectors of^foliow^ing sizes: 16 X 8 inches 2% inches 17% X 10i/-> inches 1% inches 18 X 8% inches 2^6 inches 18 X 9 inches 2^/4 inches 18 X 12 inches 1% inches 23 X 14 inches 2% inches ELECTRICAL TERMS EXPLAINED. As there are many men who have no definite idea of whatelectricity really is, and as a slight knowledge is necessaryto properly care for electric headlight equipment, and to getthe best results therefrom, a few extr Stock Photo

RM2CH1R6B–. Science of railways . of holderNo. 80Q.. If it is higher than this, there will be too muchheat onCTutchNo. 304. ,;3^1i9 foHowirig is the approximate focal point of reflectors of^foliow^ing sizes: 16 X 8 inches 2% inches 17% X 10i/-> inches 1% inches 18 X 8% inches 2^6 inches 18 X 9 inches 2^/4 inches 18 X 12 inches 1% inches 23 X 14 inches 2% inches ELECTRICAL TERMS EXPLAINED. As there are many men who have no definite idea of whatelectricity really is, and as a slight knowledge is necessaryto properly care for electric headlight equipment, and to getthe best results therefrom, a few extr

. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Stock Photo

RM2CRTC78–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained .

RM2CRTBHA–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Anienna Plate Batfery VariableInductance VariableCapacitance.

RM2CRTAXD–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . LoadingVariometer Grid,Leak FixedSecondaryInduct.. i7^r/^ Condenser

RM2CRTA5P–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . si .QOQOib-^ -T—^nn^p— .AA/ «=C „V. Tpm^-

RM2CRTA6M–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . JSl^c .s^e. 1—vJ?.Q.QQQy

RM2CRTA5N–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . 1—vJ?.Q.QQQy. si .QOQOib-^ -T—^nn^p— .AA/ «=C „V

. Announcement ... Dept. of engineering. n, and the student is nextinstructed in the class of phenomena embraced under Static Elec-tricity. Here the difference betweenconductors and insulators, the mean-ing of certain electrical terms, theaction of electrified bodies upon eachother, an explanation of the variouselectro-static machines, properties ofatmospheric electricity and the valueof lightning rods are thoroughly explained. Current Electricity is next dis-cussed in a very thorough manner,showing the difference existing be-tween electrical currents and electricalcharges ; what constitutes a Stock Photo

RM2CEFWDR–. Announcement ... Dept. of engineering. n, and the student is nextinstructed in the class of phenomena embraced under Static Elec-tricity. Here the difference betweenconductors and insulators, the mean-ing of certain electrical terms, theaction of electrified bodies upon eachother, an explanation of the variouselectro-static machines, properties ofatmospheric electricity and the valueof lightning rods are thoroughly explained. Current Electricity is next dis-cussed in a very thorough manner,showing the difference existing be-tween electrical currents and electricalcharges ; what constitutes a

RM2CRTAWN–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . mped oscillations, and itsvariations are not only in step with the antenna oscillations butits amplitudes are proportional to the amplitudes of antennaoscillations at every instant. S

RM2CRTA64–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . transformer. plate battery voltage is necessary to pass sufficiently largeplate currents through the coupling resistances. For thisreason it is common practice to use specially design

RM2CRTC6D–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . e with the first. In the first case the second fork was forced to vibrate atthe same mechanical frequency (of vibration) as the firstfork, because it was in resonance. In the second c

RM2CRTBGE–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . her potential is applied to the gridthan to the filament its potential is positive with respect tothe filament. The reverse is also, of course, true. A graph is shown in Fig. 16, whic

RM2CRTBJ2–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . •f QPos. , PlateBattery JrTegr. & Current IndicatingDevice Fig. 18—Continuous variations of grid potentials. plate current is at every instant greater than the normal value.If the gen

RM2CRTBEY–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Fig. 13—Various forms of vacuum tubes and sockets. the glass stem. The grid must, in any case, be rigid enoughto withstand considerable jarring. The plate may be of molybdenum, nickle

RM2CRTBF8–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . o-frequency potentialvariations are applied to the grid, whose amplitudes decayfrom a maximum to zero during each group of oscillations, asshown in Fig. 23. As also shown in the graph

RM2CRTAXT–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . areapplied to the second or detector tube. Let it be assumed thatthese amplified potentials are sufficient to operate the detectortube to good advantage. The rectified plate current v

RM2CRTAWW–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . y Equal Grid? PotentialVariations Fig. 29 (a)—Amplification of continuous oscillations. These amplitudes in turn depend upon the amplitudes of theaudio-frequency plate current variati

RM2CRTA8M–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . ill exert a some-what greater influence. By adjusting both the grid and platevariometers, however, a local oscillation frequency will besecured which will produce the desired beat ton

RM2CRTAT0–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Ffl. Battery - OscillationGenerator. FilamentRheostat 7 Fig. 28—Schematic circuit for the production of beats. produced by a local oscillation generator whose frequency is101,000 cy

RM2CRTAY6–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . CouplingVariometer Grid LeakResistance rp UGnW * 6ridCondenser 42. VariableCondenser Tickler (Coupling toVariofneterisVariable). Fig. 38—Single Circuit Regenerative Receiver. Fig. 38

RM2CRTBEW–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . requency rate (frequency with the limits of audible sound),air waves of the same audible frequency will be produced bythe receiver diaphragm. The radio-frequency oscillations aremolde

RM2CRTAT4–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . e receiver might be only in resonance at the 3000 meter wave. A receiver having such a circuit may be called a singlecircuit, regenerative receiver. The inductance and capacitance are

RM2CRTBGA–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . value of current strength attained in eachdirection of current flow during each cycle is called the ampli-tude. If successive amplitudes are of equal values as long asthe current flow

RM2CRTBG1–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . tothe lower bend of the curve. If, then, the applied alternatingpotentials never exceed this value of negative potential, no gridcurrent will flow at any time. There is no rectificati

RM2CRTAXK–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . y turn the variation mightnot be smooth enough. That is, it might be necessary tosecure a variation of inductance less than that of one turnon the coil. In this case a variometer may

RM2CRTBFG–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . y be pointed out here that thenormal potential of the grid with respect to the filament isalways zero. During a group of oscillations the negativecharge on the grid is built up to a c

RM2CRTAWF–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . ll depend upon the ratio of the total antenna induc-tance to total antenna capacity. By increasing the inductanceand simultaneously decreasing the capacitance a value ofeach will be f

RM2CRTBHH–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . step with the frequency of thesound waves acting upon the distant transmitter. Fig. 25 givesan idea of how this is accomplished in the receiving circuits.In all of the above considera

RM2CRTA56–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . fn9 s GridVariometer VariableAntennaInduct PlateVariometer Audio Freq. Coupling ^Transformers VariableTuningCondenser. Ground Plate Battery Fig. 47—Suggestion for Short Wave Regenerat

RM2CRTAXY–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Antenna CouplingVario-meter =5= Variable/- Condenser Grid LeakResistance .Grid Grid Condenser. TelephoneReceivers 35p Ground Fig. 37—Simple Single Circuit Receiver. and there are rec

RM2CRTA4X–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . + Plate Batteryfor Amplifier Plate Batteryfor Detector w Coupling Grid Transformer. ziZt*. VariableCoupling Plate Battery tH lining Fig. 45—Two circuits for radio-frequency amplificat

RM2CRTBGH–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . xplained. When air is exhausted from any kind of a vessel a vacuumremains and the degree of vacuum depends upon the degreeof air exhaustion. The vacuum within a so-called vacuumtube i

RM2CRTC5J–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . rection then the other and causes the 26 A B C OF VACUUM TUBES water, therefore, to flow in each direction periodically. Thewater does not flow past the elastic partition at any time.

RM2CRTA92–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . -smfo-1—I—II—1A joj OridWof. Variable Coupling PlateBattery or Phones ■Negative Plate BatteryTerminal Grounded here(Puts that Terminal atGround Potential toAvoid Capacity Effect) W G

RM2CRTA6A–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Ground Plate Battery Fig. 47—Suggestion for Short Wave Regenerative Receiver and Two Stage Audio-frequency Amplifier. on an extremely weak signal which could not possibly beheard with

RM2CRTAWT–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . the grid circuit VACUUM TUBE AMPLIFIER 81 and connecting the negative battery terminal to the grid.Another and better method is to include a portion of the fila- 100908070 +.-60 c I 5

RM2CRTBF7–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Plate + <Pos. Plate = Battery-§Neg. Current IndicatingDevice Fig. 15—One method of varying the grid potential. flow in the grid circuit, from grid to filament inside the tube.Th

RM2CRTC60–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . and is the first fundamental law of electrical circuits. Direct Current If the E. M. F. applied in a circuit is steady and only actsto force the current to flow in one direction throu

RM2CRTC6H–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . door-bellit is necessary to connect the bell to a battery by means ofinsulated wires and if the path, or circuit, is broken at anypoint the bell will not ring. A push button may be us

RM2CRTA8G–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . or Short and Medium Waves. In Fig. 43 is shown the schematic circuit of a two stageaudio-frequency amplifier coupled to a detector. If in any ofthe previous circuits the grid circuit

RM2CRTA51–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . he plate battery voltage from time to timeas the filament ages. The coupling transformers have closed iron cores like theillustration of Fig. 44. The upper Fig. 45 shows a two stage r

RM2CRTBJB–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Glass Wall of Tube ■-Filament Support (Springy) Plate (cut away) Grid Support -WiresSealed here<■ Leading-inWires -Brass Shell Base <—-ProngsFig. 12—Construction of a typical v

. An elementary manual of radiotelegraphy and radiotelephony for students and operators . S TELEGRAPHY. Explained insimple terms for the non-technical reader. 54 Illustrations. Second Edition, revised.280 pp. 3J-. 6.y. net. THE SOCIETY FOR PROMOTING CHRISTIAN KNOWLEDGE, NORTIILI.MBERLAND AVENUE, ChARING CR0S.S, LONDON, W.C. MAGNETS AND ELECTRIC CURRENTS. .An Elementary Treatise for the use of Electrical Artisans and .Science Teachers.Third Edition. 136 Illustrations. 408 pp. y- ^^- i*^- E. & F. N. SPON, LTD.,57, Haymarket, London, S.W. AN ELEMENTARY MANUAL OF RADIOTELEGRAPHY ANDRADIOTELEPHONY Stock Photo

RM2CRW8D5–. An elementary manual of radiotelegraphy and radiotelephony for students and operators . S TELEGRAPHY. Explained insimple terms for the non-technical reader. 54 Illustrations. Second Edition, revised.280 pp. 3J-. 6.y. net. THE SOCIETY FOR PROMOTING CHRISTIAN KNOWLEDGE, NORTIILI.MBERLAND AVENUE, ChARING CR0S.S, LONDON, W.C. MAGNETS AND ELECTRIC CURRENTS. .An Elementary Treatise for the use of Electrical Artisans and .Science Teachers.Third Edition. 136 Illustrations. 408 pp. y- ^^- i*^- E. & F. N. SPON, LTD.,57, Haymarket, London, S.W. AN ELEMENTARY MANUAL OF RADIOTELEGRAPHY ANDRADIOTELEPHONY

RM2CRTC65–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . FULLY ILLUSTRATED New York THE NORMAN W. HENLEY PUBLISHING CO. 2 West 45th Street 1922 Copyrighted, 1922 BY The Norman W. Henley Publishing Co. 427^7 PRINTED IN U. S. A.. PREFACE The

RM2CRTBGD–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . .2 c o .H b£ ■*-> ■i— G C o s > 1. (s|iun Xaej4iqiB) ^.uajJOQ aieid 56 A B C OF VACUUM TUBES fication of the plate current. Coincident with this actionthere is also an actual re

RM2CRTA61–. The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained . Tpm^-. /s t <u U o Ho <u -»-o<u ccoo u E < o CU cr < c -i-l Q a£< oc crs- T3 io8 A B C OF VACUUM TUBES frequency amplifier, detector and three stage audio-frequenc

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