28 ESSEX STREET · STRAND · LONDON · W.C.2.

INDEX · VOLUME xxv·I

1954

INDEX

J anuary to D e c emb er

ft "~ 3:1~- 3~., 1 9 5 4 fl'«a 4~ -fr.­""t. ~ -1~1 .. ,. '~r- •I• ""'" • 7CJ - ttl. l ".... ~i.l - 2. .. t. .,. "1... ~ ~3- 32.'

Slit-

oe-;-~V'

}> fi"c.

·A

3)5 41 '· 4• 9-1"1 -1 ,~-- $""' 12..

~·~ -nD

A.C. Voltage Stabilizers, by W. M. Dalton A.C. Voltage Stabilizer, An, by R. G. Ackland Amplified-Torque Clutch, An, by R. Voles

(Letters to the Editor) . . . . Amplifiers, Starved, by G. E. Kaufer AN-5 Casting Resin . . . . . . . . Analogue Divider, A Simple, by J. L. Douce

(Letters to the Editor) . . . . . . Apparatus Design, Minimizing Contact Potential in,

by E. C. J. Marsh . . . . . . . . . . Arc Voltage Drop Measurements on Grid-controlled

Mercury Rectifiers, by T. H. Barton and F. A. Benson . . . . . . . .

Atomic Hydrogen in the Research Laboratory, by R. L. F. Boyd and N. D. Twiddy ..

Attenuator Design , by N. H. Crowhurst ..

B

Page

310 143

13 132 498 26

155 412

148

406

78 76

Batching Counter, A Cold Cathode, by P. E. Tooke 160 Batching Counter, An Industrial, by R. W. Brierley 157

BOOK REVIEWS . . 40, 84, 128, 174, 220, 280, 326, 372, 416, 460, 508, 556

Advances in Electronics, Volume IV 220 Amplification and Distribution of Sound 373 Applied Electronics Annual, 1953-1954 281 Automatic Digital Calculators . . . . 84 Automatic Voltage Regulators and Stabilizers 462 Battery Chargers and Charging 281 Cathode Ray Tubes . . . . . . 460 Circuit Theory and Electron Devices . . . . . . 174 D~ta and Circuits of Television R eceiver Valves Book IIIC . . 461 D1e Laplace-Transformation und hire Anwendung (The Laplace

Transformations and its Application) . . . . . . . . 85 Einschwingvorgange Gegenkopplung, Stabilitat Theoretische

Grundlagen und An wendugen (Transient Phenomena­Counter Coupling, Stability- Theorectical Principles and Applications . . . . 417

Electrical Contractor's Annual . . . . 461 Electrical Earthing and Accident Prevention 328 Electrical Engineers' Reference Book 462 Electron Optics . . . . . . . . 558 Electronic Musical Instrument Manual, The 220 Electronics . . . . . . . . . . 556 Electronics- Physical Principles and Applications 372 Faster than Thought . . . . . . . . . . 86 Fields and Waves in Modern Radio . . 374 Fluorescence Analysis in Ultra-Violet Light 510 Four-Place Tables of Transcendental Functions 221 Fundamentals of Electronic Motion, The 280 Guide to Audio R eproduction . . 221 Faster Than Thought . . . . . . 86 High Voltage Laboratory Technique 373 Industrial Electronic Engineering . . 327 Industrial Electronics . . 372 Industry and Science . . 461 Instrument Manual, The . . . . . . . . . . 40 Insulation of Electrical Equipment, The . . . . . . 418 Introduction to Ultra-High-Frequency Radio Engineering 22 1

Introduction to Valves Introductory Circuit Theory :: . . . . Kempe's Engineers' Year Boo . , 1954 .. Laplace Transforms for Electrical Engineers Low-Frequency Amplification M agnetic Amplifier .. Magnetic Amplifiers . . . . . . Magnetic Amplifiers and Saturable Rc::actors Mechanism of Economic Sy~tems, The Methods of Theoretical Physics .. Microwave Lenses .. Microwave Spectroscopy Modern E lectroplating Nuclear Physics .. Optical Worksho p Principles Oscilloscope at Work, The . . . . . . Physics and Applications of Secondary Emission Physics of Experimental Method . . . . Power System Transients . . . . . . Practical Electrician's Pocket Book 1955 The Practical Television Circuits . . . . ' . . Present State of Physics, The Principles and Practice of R adar Principles of Electronics .. Principles of Physical Optics . . . . Principles of Mass and Flow Production

Page 85

461 174 51() 281 ,,o 40

418 418 175 176 327 417

41 328 510 462 418

. . 557 129, 558

557 556 175 128 462

Principles of Transistor Circuits . . . . . . . . . . Probability and Information Theory, with Applications to Radar Proceedif!gS of the National Electronic Conference, 1953 . . . . Progress m Nuclear Physics, Volume 3 ..

509 326 116 510 374

R adioactivity and R adioactive Substances . . Radio Engineering .. Radio Receiver D esign . . . . . . Relays for Electronic and Industrial Control Rocker Propulsion Rotating Amplifiers . . . . . . Rutherford, By Those Who Knew Him

86 41 , 129

280 460 462 372 509

Servo Mechanisms . . . . . . Simultaneous Linear Equations and Th~ Det~rmin~tion "'~

281 Eigenvalues . . . . . . Small Transformers and Inductors . . . . Soft M agnetic M aterials for Telec(lJ)U]l.Unicat>on Static Electrification . . . . . . . . Statistical Methods of Electrical Engineering Technical Aspects of Sound .. Technique de Ia Television .. Television Antennas and Converters Television Engineers' Pocket Book . . . . Television Engineering Principles and Practice Television Receiver Servicing .. Text Book of Radar, A . . . . . . Thermionic Valves, Their Theory and Design . . . . . . Transistoren-Wirkungsweise, Eigenschaften und Anwendungen

(Transistors-Mode of Action, Properties and Applications) Vacuum Tube Oscillators . . . . . . . . . . . . Vector and Tensor Analysis . . . . . . Wireless and Electrical Trader Year Book, 1954 Year that made the D ay, The

c

84 176 327 327

84 176 175 557

85 508 557 416

558 128 510 328 129

Capacitors, The Zinc Coating of Paper for, by Vacuum Evaporation, by L. Holland and K. Hacking 296

Charges and Currents, Induced, by W. E. Benham 366 Circuits and Logic, More about, by T. L. Craven 302 Clipper with Automatic Mark-Space Ratio Control,

by A. B. Johnson 364

Cold Cathode Counting Tubes in Cascade, The U e of, by D. T. Whelan . . . . . . . . . .

Cold-Cathode Scaling Unit, A, by C. D . Florida and R. Williamson

Colour Television . . . . . . . . Colour Television Broadcasting in the U.S.A. , by C. G.

Mayer.. . . . . Commonwealth Radio Communication Services, by D.

Scott . . · . . . . Communications in the Antarctic . . Computing Components, A Revie~ of Magnetic and

Ferro-electric, by V. L. Newhouse . . . . Conductimetric Tube for Chemical Analysis at Low

Frequency, A Simplified Circuit and, by G. G. Blake .. (Errata) . . . . . . . .

Counter Batching, Multi-Channel, by P. Huggins Counting Tubes, Decimal, by K. Kandiah Count-Rate Meter, A, by E. W. Pulsford Coaxial Standing-Wave Indicator, A, by F. A. Benson

and G. V. G. Lusher (Letters to the Editor) . . . . . .

Current Stabilizers for Electromagnets, Direct, by M. W. Jervis . .

Page

I 18

186 320

342

224 503

192

316 368 308 56

356

534 552

429

COMMENTARIES 1' 45, 89, 135, 179, 223, 283, 329, 375, 419, 465, 513

D Dampometer, The, by C. 0. Olsson and K. Orlik-

Ruckemann 420 o.c. Amplifiers, Methods of Amplifying and Measuring

Small Direct Currents and Potentials, by J. Yarwood and D. H. Le Croissette-Part 1 . . 14 Part 2 . . .64 Part 3 . . . . 114 (Letters to the Editor) 369

Desk Audiometer for Research Work 210 Detector Cars, New Television 455 Diffraction Gratings in Industry 213 Digital Calculating Machines, Valve Reliability in, by

L. Knight . . . . . . 9 Digital Computor Circuits, The Selenium Rectifier in, by

A. D. Booth and A. D. Holt . . . . . . 348 Digital Computor, The Design and Construction of the

Manchester University, by K. Lonsdale 376 Direct Currents, The Measurement of Very Small, by

M. W. Jervis 100 (Letters to the Editor) 412

Divers' Intercommunication Equipment, Development ~ 8

Driven Clamp in the Presence of Noise; The, by P. B. Helsdon 315

E Electrical Backlash Circuit, An, by C. H. Banthorpe 110 Electrical Measurements at Centimetre Wavelengths,

by J. W. Sutherland . . 46 Electro-Magnetic Counter, A High-speed, by G. H.

Townend . . . . . . . . . . . . 21 J Electronic Multiplier, A Simple, by K. H. Norsworthy . . 72 Electrophoresis in the Valve Industry, by L. E. Grey and

R. 0 . Jenkins 402 Empirical Transient Formulae, for Systems with Flat or

Peaked Frequency Responses, by Z. E. Jaworski 396 Epoxy Resins, by R. A. Johnson 136

ELECTRONIC EQUIPMENT- 82, 130, 170, 214, 324,370,414,456,506,554

A.C. Ammeter, Differential . . . . 555 Aerial Multi-Coupler (Type PV 95) . . . . . . . . . . 458 Airborne Communication Equipment, STR. l2D 140-Channel

Airb~~~:·com~·{unicati~n Equipment, STR.20 5.60/623-Chann·e·l V.H.F. . . . .

Altimeter, FM R adio .. Amplifier, Computer . . Amplifier, Computing Amplifier, L.R.F. . . Amplifiers, Magnetic .. Amplifier, Wideband Audio . . Amplifier, Wide Band Distributed Anode Ccnnectors, v.H.F. . . . . Antenna J'attern Recorder, Type £.59 Attenuator, Midget .. Attenuator, lOOdb Step . . . . " A YO" Hi2h Voltage D.c. Multiplier

459

459 459 415 459 325 215 554 215 507 215 131 555 170

" AVO " Valve Tester, Type 160 Balancing Machine, Strobodynamic Berco Rotary Regavolt Blowers, Air . . . . . . Bridge, Incremental Inductance Bulbs, L.E.S. Pilot . . . . . . Capacitor Power Factor Measurement Capacitors, Ceramic .. Capacitors, Duconol .. Capacitors, Electrolytic . . . . . . . . . . . . Capacitors, High K Ceramic Dielectric Varnish Protected Tubular Capacitors, " 'Plimoseal " Silver Mica . . . . . . . . Capacitors, Silvered Mica . . . . . . Capacitors, Super Tropical Paper Tabular . . Capacitors, Variable . . . . Cathode-Ray Tubes, Square Faced Ceramicons Ceramic, Faradex H .. Ceramic, Frequentite S Ceramic Terminal Seals . . . . Composition Element Potentiometers Connectors and Retainers, Valve Top ap Control Lock, Pre-Set .. Control Monitor, Type SM.252 Counter, Electronic .. Cracked Carbon Resistors C.R.T. Miniature C. R.T. Photo-Recorder . . Current Detector, Alternating D.C. Amplifier, Vibrating Capacitor Decade Capacitor Box .. Discriminator Transformers .. D .M .E. Interrogator, New .. Dual Channel Stabilised H.T. Unit Electrometer Voltmeter Electro-Mano~Deter Eyelets . . . . Fasteners, Panel . . . . Filters, Variable Frequency Cut-Off Fuse Holders .. Fuses . . . . . . . . Gauge, Electronic, Type 1106 Genera tor, Type P.G.96, Two-Tone .. Gilderphone .. Glass Bonded Mica . . . . H elical Membrane Coaxial Cables . . Hermetically Sealed Germanium Diodes High K Disks .. High K Tubes . . r.F. Transformer Inductors, High Q . . . . Intensity Meter, Television Signal .. Intercommunication Equipment, Aircraft Ionization Test Set, A.C. Knobs, " Bembridge Series " Lampholders, L.E.S . . . . . Line-E.H.T. Scanning Transformers Loudspeakers . . . . . . . . . . . . . . Measuring Equipments, Field Strength and Radio Noise .. Megohmmeter . . . . Metal Film Resistors . . . . Metallized Polystyrene Capacitors Metallized Terminals .. Meter Tester . . . . Microdensers, Miniature Microwave Instruments . . . . Miniature Lead-Through Capacitors Monitor, Hand and Clothing, l 319A Monitor, R adiation .. Motor Controller, Electronic Mounts, Anti-Vibration .. Multi-range Meter, Electronic Multi-Channel Tuner . . Oil, Transformer . . . . Omni-Directional Sound Diffuser Oscillator, Low Frequency Decade Oscillators, Audio Frequency Oscillator, S-band .. Oscillator, Vibration .. Oscillator, X-Band .. Oscilloscope, Cathode-Ray Oscilloscope, Model 1058 . . . . Oscilloscope, Servo and General Purpose Oscilloscope, Type XT.316 .. Packaged Computer F .P.C. l , New Packaged Computer F.P.C. l Permanent Magnet Focusing Unit Pick-Up Head, Acos HGP.35-l Plug-in Counter Units Plugs and Sockets Polarograph . . . . . . . . Polythene Insulated High Impedance Coil . . Potentiometers, Midge 2-Watt Wirewound Potentiometers, Miniature and Sub-miniature Power Relay, Miniature Power Supply, Twin Stabilized Power Supply Unit, Klystron Power Unit, Stabilized .. Pre-amplifier, Television Masthead . . . . Preselector, Type PV98 and PV98A , 5-Channel H .F. Pre-set Carbon Potentiometer, Miniature Pulse Analyser, Type N .IOI Pulse Generator, Rotary Push-button Switches . . Quadrant Meter . . . . . . Radar, Precision Approach Airfield .. Radio Aid Unit, General Purpose Recorder for Two Variables . . Recorder, Duplex Quick Response Recorder, Miniature . . Relay, Mercury Switch Relay, Miniature Relay, Electronic Rheostats

Page 170 554 171 507 215 414 131 172 171 170 170 173 554 171 83

217 171 173 173 173 171 415

83 457 324 173

. 325 216 507 215 415 173 456 216 214 324 173 131 83

171 173 214 458 458 172 173 172 172 172 173 555 415

" 83 82 172 415 173 131 370 82

173 173 173 370 173 215 173 214 415 506 507 555 173 414 172 217 414 215 457 217 414 214 555

82 457 457 171 170 217 171 370 173 172 554 325 130 555 414 415 458 172 2 15

82 172 554 459 456 216 130 506 371 507 324 171

Scaling Unit, Type 1221B Screened Quad Cables . . . . Selective Amplifier-Detector, Type D-669 Shock Absorbent Packing .. Signal Generator, Television .. Signal Generator, TF 80la/l .. Signal Generator, TF 995A, F.M./A.M. Signal Generator, Type D.l /D Signal Generator, u.H.F. Signal Generator, v .H .F. Silvered Mica Capacitors Soldering Head, Automatic Soldering Irons . . . . Sound Level Indicator, Type 1408 Spectrometer, Infra-red .. Spectrometer, One-third Octave Stacked Foil, Miniature .. Standardizer, Ferrous Metal . . . . . . . . . . Strain Gauge Bridge, Automatic Balancing Three-Channel Strain Gauge Bridge, Automatic Self-Balancing . . . . Strip Connectors, Multiple Switch{ Heavy Duty .. Switch, Minibank . . Switches, Micro-Sensitive Switches, Multi-Contact Switches, Rotary facometer, Electronic . . . . . . . . . . . . fandem Dual Concentric Spindle Carbon Track Volume Control Television Detectors Tester, Audio . . . . . . Testing Set, lOkV Insulation .. Test Set, TF 982, v.H.F. . . Test Set, Quartz Crystal Activity Tetrode, u .H.F. Transmitting . . Toroidally Wound Potentiometers Transformers . . . . Transient Photometric Unit Tra11sceiver, Lightweight Transistor, !unction .. Transistors . . . . . . . . . . Transistors, Point-contact and Junction-type Transmitter, G.l42 Transmitter, 0.143 . . . . . . Transmitter-Receiver, High Power .. T .R . Cells Triodes . . . . . . . . . . Twist Prong Multiple Miniature Units Twist Prong Single Miniature Units u.H.F. Piston Attenuator, Type A.57 Ultras~~ic Thic;kne~~ Gauge, Type 1101 Umts , Polyrmcro . . . . . . Valve Retainers, Cat. No. VRA.6 . . Valve Retainers and Extracting Tongs Valves . . . . . . . . Valve-Voltmeter, Feedback .. Voltage Regulator, Automatic Voltage Stabilizer Waler Switches Wa:>hers, Locking .. Wave Analyser, Type 853 .. Wave Correlator, Type D-727A Waveguides, Electroformed . . Wide Band Oscillocope Mk.II . . . . . . Wire-Wound Resistors, "Precistor" High Stability Wire-Wound Resistors, Resin Encapulated Precision Wiring Jigs . . . . . . . . . . . . ·

F Flight Simulators for Canada .. Frequency, Improvements in U.S.A. Primary Standard of Frequency-Shift Diplex, by S. C. Heward ..

(Letters to the Editor) .. Frequncy-Shift Keying and Radio Teleprinter Systems,

Developments in, by A. G. Williamson

G G.E.C. Laboratories for Semiconductor Research and

Development, New . . . . . . . . Germanium Diodes with Special Reference to Television

Sound Detectors, Some High Frequency Effects in, by D. D. Jones and B. C. Brodribb (Letters to the Editor) ..

Glare Meter, A Simple, by V. J. Jehu .. Glow-Discharge Voltage-Regulator Tubes, Impedance­

Frequency Variations of, by F. A. Benson and G. Mayo

H H.F. Airborne Communication Equipment, by G. L.

Page _ 216 173 216 131 371 457 457 170 507 325 172 172 325 170 370 217 112 506 456 456 371 325 171 170 325 171 414 172 172 324 216 457

82 506 173 415 216 371 507 172 130 459 458 457 171 172 170 170 170 170 170 171 131 172 130 371 324 172 83

214 217 325 217 171 173 171

105 428 268 369

260

474

33 177 359

206

Warner 253 H.F. Communication Systems, A Review of Current

Practice, by A. W. Cole . . 232 H.F. Receivers, New Developments in, by F. W. J.

Sainsbury . . . . . . . . 241 High Power Aerial Switching, by C. Gillam 274 High Power Communication Transmitter, A, by W. J.

Morcom 237 (Errata) 321

Page High Voltage Sawtooth and Rectangular Wave Pulse

Generator, by W. D. Edwards 36 Human Heart-Rate, Continuous Recording of the, by

W. E. Boyd and W. R. Eadie 330 (Letters to the Editor) 505

I Image Amplifier, Marconi . . 497 Impedance Matching Arrangement, A New 291 Impulse Noise Generators, Simulation and Measurement

of Ignition Interference for Tests on Sound and Vision Receivers, by M. V. Callendar 200

Industrial Television, Cheaper 440 Infra-redlPhotoceU, A New 365

L Ladder Network Composed of n Similar Elements, The

Voltage Ratio and Output Impedance of a, by T. S. Fox and K. R. Sturley 447

Leak Detector for Evacuated Vessel, A Differential, by D. A. Lundberg . . 436

LEO, Lyons Electronic Office 162 LEO, Lyons Electronic Office-

Part 1, History and Technical Description, by J. M. M. Pinkerton and E. J. Kaye . . 284 Part 2, Operation and Maintenance, by E. H. Lenaerts 3 3 5 Part 3, A Checking Device for Punched Data Tapes, by E. J. Kaye and G. R. Gibbs . . 386

Low-Pass Filter with a Continuously Variable Cut-off Frequency, A, by J. W. Thompson 120

Linear Accelerator, A 15MeV for Medical Use . . 527 Linear Servo Systems, Step to Frequency Response

Transforms for, by L. C. Ludbrook Part 1 27 Part 2 . . 51 Part 3 . . 122

Linear Servos, The " Least Squares " Criterior Applied tot by R. Voles . . . . 452

Low Power M.F.-H.F. Communications, Naval, by J. R. Humphreys 272

LETTERS TO THE EDITOR- 42, 80, 132, 177, 218,282,322,369,412,504,552

Alternating Current Stabilizer, An . . _ 133, 218 Amplified-Torque Clutch . . . . 132 Amplifier, A Simple Low Frequency 80 Amplifier Output Impedance, Multi-stage 553 Amplifiers, High-Speed Magnetic . . . . . . 323 Anode-Follower Type Circuits, Output Impedance o 552 Amplifier, Wideband Audio . . . . . . 554 Circuit for Moisture Measurement, A Simple 218 Characteristics of Mazda Diode 29cl. . . . . . . 133 Characteristic of the Temperature-Limited Diode, Type 29c1 42 Count-Rate Meter Circuit, A 552 D.C. Amplifiers . . . . . . 369 D.c. Amplifiers, A Negative Supply for 413 D.C. Stabilized Supply, 1.5V. lA . . . . . . . . . . 81 High Efficiency Radio Frequency E.H.T. Supplies, the Design of . . 505 High Efficiency Radio Frequency E.H.T. Supplies, the Design of.. 553 Human Heart-Rate, Continuous Recording of the . . 505 Equivalent Q of R.C. Networks 177

(Errata Notice) . . 219 Frequency Shift Diplex . . . . . . 369 Germanium Diodes, High Frequency Effects in 177 Instrument Cable, Noise-Free . . . . . . . . . . 42 Low-Power Microwave Attenuators, A Comparison of the

Properties of Certain Materials Used In . . 80 Microphony in Voltage Reference Tubes 219, 322, 412 Organ, Wurlitzer . . . . 132 Ratiometer, A Pulse Frequency 412 Stable Multivibrator, A . . . . . . 504 Ten-Volt Effect With Oxide-coated Cathode 282 Theoretical Transistor Symbol . . . . . . . . . . 322 Transistor Performing the Dual Function of Rectification and

Amplification for Chemical Analysis at Radio-Frequencies . . 504 Transistor Symbol . . . . . . 177 Trigger Circuit by a Contact, Setting a . . . . . . 177 Very Small Direct Currents, The Measurement of 219, 412

M Magnetic Amplifiers and Some New Developments, High

Speed, by A. E. Maine 180 (Letters to the Editor) 323

Magnetic Amplifier, An Even-Harmonic, by P. D. Atkinson and A. V. Hemingway 482

Magnetic Amplifiers, Three-Phase High-Speed, by A. E. Maine . . 514

Magnetic Delay Units, Measuring the Accuracy of, by G. Jamieson 203

/

Page Measurement of the Relative Slip Between Two Rollers,

A Relay Operated U nit for the, by G. J. Parish 112 Measurements, Slotted Line Impedance, by E. G. Hamer 163 Meetings this Month 44, 88, 134, 178, 413, 463,

• 0 512, 560 Microwave Oscillators, Voltage Stabilizers for, by F. A.

Benson and G. V. G. Lusher 106 Microwave Measurements, The Transistor as a o.c.

Amplifier for Use in, by, C. F. Davidson 548 Miller Time-Base Circuit, A Rapid Flyback, by W. Fraser

and M. W. Jelffs 71 Mixed Display of a Periodic Function and its Time

Integral, The, by I. G. Baxter 185 Monitor and Trigger, A General-Purpose, by P. Gleghorn 383

N Narrow Band Frequency Shift Telegraph System, A, by

R. Terlekci 265 Noise Cancelling Telephones, A Junction Transistor

Amplifier for . . 521 . Nomogram for Hartree's Threshold Voltage Criterion for

Magnetrons, A. , by J.D. Harmer 0. 341 Null Transmission Networks, New, by E. M. Reid 444

0 0.4 Octave Bandpass Filters for Frequencies Between

10 and 200kc/s, A Set of, by H. Pursey 31 Oscillator, A Time Base, by C. H. Banthorpe 168 Oscillator Feedback Networks of Minimum Attenuation,

by P. W. Ward 318 Oscillator for Centralized Transmitter Drive Units, A

High Stability Variable Frequency 147 Oscilloscope, A Large Magnetically-Deflected, by

P. E. K. Donaldson 442

p

Phase Meter, An Audio Frequency, by F. P. Moss Physical Society Exhibition, The 38th Polytetrafluorethylene (P.T.F.E.), New Uses for .. Power Amplifiers, The Design of Triodes for U.H.F.

Medium-Level, by W. E. Rowlands . . Pulse Generator, A Fast-Rate Variable, by J . C. Baker .. Pulse Duration Modulator Circuit, by F. Butler .. Pulse Generator, A High-Voltage High-Current . . Pulse-Interval Meter, A, by A. M. Andrew and T. D. M.

361 214 492

522 190 153

63

Roberts­Part 1 Part 2

Publications Received

469 543

88, 169, 374, 411 , 463, 512, 560

Q Q as a Mathematical Parameter, by D. Morris 306 Q Meter Readings, The Correction of, by J.P. Newsome 408 Q-Meter, R.F. Cable Characteristics Measured with a,

by Jacob Shekel 540

R Radio Frequency E.H.T. Supplies, The Design of High

Efficiency, by J. Barron (Letters to the Editor)

Radiography, Industrial Radio Teleprinter Systems, by D. H. C. Scholes . . R.E.C.M.F. Exhibition Preview Relay Cable, New Television

393 505, 553

481 256 170 295

Relay of High Sensitivity, A Simple Stable Capacitance Operated, by W. V. Dromgoole . . . .

Relay Scale-of-Two Circuits, by R. C. M. Barnes­Part 1 Part 2 . .

s Short Irregular Lines, Some Steady-State Characteristics

454

432 493

of, by A. Rosen Short New Items

90 43 , 87, 127, 169,222, 279, 321 , 368,

411 , 464, 511,559 1.5 to 30Mc/s at Sea, by D. J. Spooner 250 Some Recent Developments in Electronic Engineering . . 20

Page Square Root-Law Circuit, A, by I. G. Baxter 97 Square Wave Phase Discriminator, A Compensated, by

R. Caldecott . . 401 Surface Movement Indicator at London Airport, New

Airfield 435

T Tachometer, A High-Speed Precision, by W. R. Bland and

B. J. Cooper . . 2 Television and Sound Signals on Magnetic Tape,

Recording 292 Television Camera at Bradford Technical College, A 341 Television in the Isle of Man 30 Television Line Scanning Circuits, Differential Width

Control for, by K. G. Beauchamp 476 Television Receivers, The Noise Performance of, by T. S.

McLeod 165 Television, Underwater 96 Thermistor Bridge, A Simple Direct Reading, by D. C.

Cooper 448 Torquemeter, for Testing Gas Turbine Components, A,

by J. F. Field and D. H. Towns-Part 1 . . 486 Part 2 529

Transistor Characteristics, The Measurement of, by J. Ewels 313

TRIDAC A Three Dimensional Analogue Computor 550 Triode F.M. Discriminator, A, by I. G. Baxter . . 146 Two-Step Controller, Maintaining Optimum Cycling

Intervals, in a, by W. R. Beakely 99

u Ultra Short-Wave.Circuits, Reflexing Applied to . . 75 Ultrasonic Cleaning Plant . . 385

v Valve Circuit, An Improved Reactance 549 v.H.F. Aerial Radiation Pattern Measurements, by E. G.

Harmer 427 Valve, Fiftieth Anniversary of the, by W. J. Baker 466 v.H.F. Broadcasting Transmitters for the BBC, New 167 Voltage Stabilizers, A.c., by W. M. Dalton 310 V.O.R. Beacon, Swiss Order 39

w Waveguides at 3 OOOMc/s, Electrical Breakdown in, by

J. W. Sutherland 538

X Xenon Thyratrons, Gas Clean-up in

AUTHORS

A

199

Ackland, R. G., An A.C. Voltage Stabilizer 143 Andrew, A. M. (with Roberts, T. D. M.), A Pulse­

Interval Meter-Part 1 . . 469 Part 2 0. 543

Atkinson, P. D. (with Hemingway, A. V.), An Even-Harmonic Magnetic Amplifier 482

B Baker, J. C., A Fast-Rate Variable Pulse Generator Baker, J. C., Fiftieth Anniversary of the Valve . . Banthorpe, C. H., An Electrical Backlash Circuit Banthorpe, C. H., A Time Base Oscillator .. Barnes, R. C. M., Relay Scale-of-Two Circuits-

Part 1 .. Part 2 ..

190 466 110 168

432 493

Barron, J., The Design of High Efficiency Radio Frequency E.H.T. Supplies .(Letters to the Editor)

393 505, 553

Barton, T. H. (with Benson, F. A.), Arc Voltage Drop Measurements on Grid-Controlled Mercury

Page

Rectifiers 406 Baxter, I. G., A Square Root-Law Circuit 97 Baxter, I. G., A Triode P.M. Discriminator 146 Baxter, I. G., The Mixed Display of a Periodic Function

and its Time Integral 185 Beakley, W. R., Maintaining Optimum Cycling Intervals

in a Two-Step Controller 99 Beauchamp, K. G., Differential Width Control for

Television Line Scanning 476 Benham, W. E., Induced Charges and Currents . . 366 Benson, F. A. (with Lusher, G. V. G.), Voltage Stabilizers

for Microwave Oscillators . . 106 Benson, F. A. (with Lusher, G. Y. G.), A Coaxial

Standing-Wave Indicator 534 Benson, F. A. (with Mayo, G.), Impedance-Frequency

Variations of Glow-Discharge Voltage-Regulator Tubes . . 206

Benson, F. A. (with Barton, T. H.), Arc Voltage Drop Measurements on Grid-Controlled Mercury Rectifiers 406

Blake, G. G., A Simplified Circuit and Conductimetric Tube for Chemical Analysis at Low-Frequency . . 316 ~~~ 3~

Bland, W. R. (with Cooper, B. J.), A High-Speed Precision Tachometer . . 2

Booth, A. D. (with Holt, A. D.), The Selenium Rectifier in Digital Computor Circuits . . . . . . 348

Boyd, R. L. F. (with Twiddy, N. D.), Atomic Hydrogen in the Research Laboratory 78

Boyd, W. E. (with Eadie, W. R.), Continuous Recording of the Human Heart-Rate . . · 330 (Letters to the Editor) 505

Brierley, R. W., An Industrial Batching Counter . . 1 57 Brodribb, B. C. (with Jones, D. D.), Some High Frequency

Effect in Germanium Diodes with Special Refer-ence to Television Sound Detectors 33 (Letters to the Editor) 177

Butler, F., Pulse Duration Modulator Circuit 148

c Caldecott, R., A Compensated Square Wave Phase

Discriminator 401 Callendar, M. V., Impulse Noise Generators, Simulation

and Measurement of Ingition Interference for Tests on Sound and Vision Receivers 200

Cole, A. W., H.F. Communication Systems, A Review of Current Practice 232

Cooper, B. J. (with Bland, W. R.), A High-Speed Precision Tachometer . . 2

Cooper, D. C., A Simple Direct Reading Thermistor Bridge . . 448

Craven, T. L., More About Circuits and Logic 302 Crowhurst, N.H., Attenuator Design 76

D Dalton, W. M., A.c. Voltage Stabilizers 310 Davidson, C. F., The Transistor as a D.c. Amplifier for

Use in Microwave Measurements . . 548 Donaldson, P. E. K., A Large Magnetically-Deflected

Oscilloscope . . 442 Douce, J. L., A Simple Analogue Divider 155

(Letters to the Editor) 412 Dromgoole, W. V., A Simple Stable Capacitance

Operated Relay of Hig~ Sensitivity 454

E Eadie, W. R. (with Boyd, W. E.), Continuous Recording

of the Human Heart-Rate . . 330 (Letters to the Editor) 505

Edwards, W. D., High Voltage Sawtooth and Rectangular Wave Pulse Generator 36

Ewels, J., The Measurement of Transisto.r Characteristics 313

F Field, J. F. (with Towns, D. H .), A Torquemeter for

Testing Gas Turbine Components-Part 1 486 Part 2 529

Page Florida, C. D. (with Williamson, R.), A Cold-Cathode

Scaling Unit 186 Fox, T. S. (with Sturley, K. R.), The Voltage Ratio and

Output Impedance of a Ladder Network Composed of n Similar Elements 44 7

Fraser, J. (with Jelffs, M. W.), A Rapid Flyback Miller Time-Base Circuit 71

G Gibbs, G. R. (with Kaye, E. J.), LEO Lyons' Electronic

Office, Part 3 (A Checking Device for Punched Data Tapes) 386

Gillam, C., High Power Aerial Switching 274 Gleghorn, P., A General-Purpose Monitor and Trigger . . 383 Grey, L. E. (with Jenkins, R. 0.), Electrophoresis in the

Valve Industry 402

H Hacking, K. (with Holland, L.), The Zinc Coating of

Paper for Capacitors by Vacuum Evaporation . . 296 Hamer, E. G., Slotted Line Impedance Measurements . . 163 Harmer, J. D. , A Nomogram for Hartree's Threshold

Voltage Criterion for Magne.trons . . 441 Helsdon, P. B. , The Driven Clamp in the Presence of

Noise 315 Hemingway, A. V. (with Atkinson, P. D.), An Even-

Harmonic Magnetic Amplifier 482 Heward, S. C., Frequency Shift-Diplex 268

(Letters to the Editor) 369 Holland, L. (with Hacking, K.), The Zinc Coating of

Paper for Capacitors by Vacuum Evaporation 296 Holt, A. D. (with Booth, A. D.), The Selenium Rectifier

in Digital Computor Circuits 348 Huggins, P., Multi-Channel Counter Batching . . 308 Humphreys, J. R., Naval Low Power M.P. H.F. Com-

munications . . 272

J Jamieson, G., Measuring the Accuracy of Magnetic Delay

Units . . 203 Jaworski, Z. E., Empirical Transient Formulae for

Systems with Flat or Peaked Frequency Responses 396 Jehu, V. J., A Simple Glare Meter · 359 Jelffs, M. W. (with Fraser, W.), A Rapid Flyback Miller

Time-Base Circuit 71 Jenkins, R. 0 . (with Grey, L. E.), Electrophoresis in the

Valve Industry 402 Jervis, M. W., The Measurement of Very Small Direct

Currents 100 (Letters to the Editor) 219, 412

Jervis, M. W., Direct Current Stabilizers for Electro-magnets 429

Johnson, A. B., A Clipper with Automatic Mark:-Space Ratio Control · 364

Johnson, R. A., Epoxy Resins 136 Jones, D. D. (with Brodribb, B. C.), Some High Frequency

Effects in Germanium Diodes with Special Reference to Television Sound Dectectors . . 33 (Letters to the Editor) 177

K Kandiah, K., Counting Tubes, Decimal 56 Kaufer, G. E., Starved Amplifiers . . 498 Kaye, E. J. (with Pinkerton , J. M. M.), LEO Lyons

Electronic Office, Part 1 . . 284 Kaye, E. J. (with Gibbs, G. R.), LEO Lyons' Electronic

Office, Part 3 (A Checking Device for Punched Data Tapes) 386

Knight, L., Valve Reliability in Digital Calculating Machines 9

L Le Croissette, D. H. (with Yarwood, J.), D.C. Amplifiers,

Methods of Amplifying and Measuring Small Direct Currents and Potentials-Part 1 . . 14 Put2 .. M (Letters to the Editor) 369

Page Lenaerts, E. H., LEO Lyons' Electronic Office, Part 2

(Operation and Maintenance.) 335 Lonsdale, K., The Design and Construction of the Man-

chester University Digital Computor 378 Ludbrook, L. C., Step to Frequency Response Transforms

for Linear Servo Systems-Part 1 . . 27 Part 2 . . 51 Part 3 . . 122

Lundberg, D. A., A Differential Leak Detector for Evacuated Vessels 436

Lusher, G. V. G. (with Benson, F. A.), Voltage Stabilizers for Microwave Oscillators 106

Lusher, G. V. G. (with Benson, F. A.), A Coaxial Standing-Wave Indicator 534

M McLeod, T. S., The Noise Performance of Television

Receivers 165 Maine, A. B., High-Speed Magnetic Amplifiers and Some

New Developments . . 180 (Letters to the Editor) 323

Maine, A. E., Three-Phase High-Speed Magnetic Ampli-fiers . . 514

Marsh, E. C. J., Minimizing Contact Potential in Apparatus Design 148

Mayer, C. G., Colour Television Broadcasting in the U.S.A. 342

Mayo, G. (with Benson, F. A.), Impedance-Frequency Variations of Glow-Discharge Voltage-Regulator Tubes . . 206

Morcom, W. J. , A High Power Communication Trans-mitter . . 237 (Errata) 321

M · D. Q as a Mathematical Parameter . . 306 Moss, F. 1>'., An Audio Frequency Phase Meter . . 361

N Newhouse, V. L., A Review of Magnetic and Ferro-

Electric Computing Components . . 192 Newsome, J.P., The Correction of Q Meter Readings 408 Norsworthy, K. H., A Simple Electronic Multiplier 72

0 Olsson, C. 0. (with Orlik-Ruckemann, K.), The Dampo-

meter . . 420 Orlik-Ruckemann, K. (with Olsson, C. 0.), The Dampo-

meter . . 420

p

Parish, G. J., A Relay Operated Unit for the Measure-ment of the Relative Slip Between Two Rollers . . 112

Pin"Y...erton, J. M. M. (with Kaye, E. J.), LEO Lyons' b1.cc.tronic Office, (Part 1) . . 284

Pulsford, E. W., A Count-Rate Meter 356 (Letters to the Editor) . . 552

Pursey, H., A Set of 0.4 Octave Bandpass Filters for Frequencies between 10 and 200kc/s 31

R Reid, E. M., New Null Transmission Networks . . 444

Roberts, T. D. M. (with Andrew, A. M.), A Pulse­Interval Meter-Part 1 . . Part 2 ..

Rosen, A., Some Steady-State Characteristics of Short Irregular Lines . . . . . .

Rowlands, W. E., The Design of Triodes for U.H.F. Medium-Level Power Amplifiers

s Sainsbury, F. W. J., New Developments in H.F. Receivers Scholes, D. H. C., Radio Teleprinter Systems . . . . Scott, D., Commonwealth Radio Communication Services Shekel, Jacob, R. F., Cable Characteristics Measured

with a Q-Meter . . . . Spooner, D. J., 1.5 to 30Mci s at Sea . . . . . . Sturley, K. R. (with Fox, T. S.), The Voltage Ratio and

Output Impedance of a Ladder Network Composed of n Similar Elements · . . . . . . . .

Sutherland, J. W., Electrical Measurements at Centimetre Wavelengths . . . . . . . . . . . .

Sutherland, J. W., Electrical Breakdown in Waveguides at 3 OOOMc/s ..

T Terlecki, R., Narrow Band Frequency Shift Telegraph

System (Pilot Carrier Frequency Shift) . . . . Thompson, J. W., A Low-Pass Filter with a Continuously

Variable Cut-off Frequency . . . . Tooke, P. E., A Cold Cathode Batching Counter Townend, G. H., A High-Speed Electro-Magnetic Counter Towns, D. H. (with Field, J. F.), A Torquemeter for

Testing Gas Turbine Components­Part 1 Part 2 . 0 ••

Twiddy, N. D. (with Boyd, R. L. F.), Atomic Hydrogen in the Research Laboratory

v

Page

469 543

90

522

241 256 224

540 250

447

46

538

265

120 160 211

486 529

78

Voles, R., An Amplified-Torque Clutch 13 (Letters to the Editor) 132

Voles, R., The "Least Squares" Criterion Applied to Linear Servos 452 (Errata) 511

w Ward, P. W., Oscillator Feedback Networks 318 Warner, G. L., H.F. Airborne Communication Equip-

ment . . 253 Whelan, D. T., The Use of Cold Cathode Counting Tubes

in Cascade 0 • • 118 Williamson, A. G., Developments in Frequency Shift

Keying and Radio Teleprinter Systems . . 260 Williamson, R. (with Florida, C. D.), A Cold-Cathode

Scaling Unit . . 186

y

Yarwood, J. (with Le Croissette, D. H.), n.c. Amplifiers, Methods of Amplifying and Measuring Small Direct Currents and Potentials-Part 1 . . 14 Part 2 . . 64 Part 3 . . 114 (Letters to the Editor) 369

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