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Below are some scanned and cleaned up articles from my collection of Wireless World magazines
1950 to 2003 Wireless World went downhill after 2000 At present I am looking for black/grey KT66s in any condition for a future project and web articles about the QUAD IIs ~ February 2023 ~ |
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 Some of the pdf files have odd fonts and have watermarks embedded and may not look correct in applications other than Adobe Acrobat ~ Some pages have odd sizes but if printed at 100% and centred should print at the original size on A4 or larger paper or choose fit to printer margins for a full page image which may be easier to read |
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| Loudspeakers Exposed ~ John Watkinson ~ watch out for the GRIM speaker | |
| Error feedback in audio power ~ William de Bruyn ~ M. Hawksford ~ E. M. Cherry | |
| 300V/µs power ~ Giovanni Stochino ~ possibly the fastest high power audio …? | |
| Class–A power ~ After two and a half decades … ~ John L. Linsley Hood | |
| A fresh look at valve power ~ Morgan Jones ~ Valve amplifiers | |
| Ironing out Distortion ~ Edward Cherry ~ How to reduce distortion ~ parts 1&2 | |
| Proof for the golden ears hypothesis? ~ No proof just an advert for Audio Precision | |
| Trial by three tones ~ Ivor Brown | |
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Audio current conveyor ~ The PA630 IC ~ where is it now?
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| Evolutionary Audio ~ Solid–State Audio Power ~ John L. Linsley Hood | |
| Designing low–noise audio amplifiers ~ Wilfried Adam | |
| High–resolution frequency counter ~ Stephen Theobald | |
| Noise in electronic systems ~ D. A. Bell ~ lots of good references | |
| Helical antennas for 435MHz ~ James Miller ~ G3RUH | |
| How to make electric charge from a radio wave ~ R. C. Jennison | |
| Micro-controlled radio-code clock ~ N. E. Sand | |
| 80-100 Watt Mosfet Audio Amplifier ~ John L. Linsley Hood | |
| Fast amplitude stabilisation on an RC oscillator ~ I. M. Filanovksy ~ V. A. Piskarev ~ K. A. Stromsmoe | |
| Phase-shifting oscillator ~ Roger Rosens | |
| Cardboard clock ~ Michael McLoughlin ~ Haberdashers' Aske's School Elstree | |
| Electronic Thermometer ~ A. S. Henderson | |
| Measuring transient intermodulation in audio amplifiers P. Antoniazzi ~ C. Buongiovanni ~ S. Tintori |
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| Wien–bridge oscillator with low harmonic distortion ~ John L. Linsley Hood | |
| Introduction to low-noise amplifier design ~ A. Foord | |
| Nanocomp ~ R. Coates | |
| An acoustically small loudspeaker ~ R. I. Harcourt | |
| Non-echoic acoustic measurement vith the HP 3582A spectrum analyser ~ R. N. Grubb | |
| Electrostatic headphones ~ N. Pollock | |
| Speaker directivity and sound quality ~ James Moir and Associates | |
| Bookshelf loudspeaker MkII ~ Jim Wilkinson ~ Sony Broadcast | |
| Audio preamplifier with no t.i.d. ~ Yuri Miloslavskij | |
| Valves versus Transistors ~ 3 amps all from QUAD ~ James Moir and Associates | |
| Current Dumping ~ does it really work? ~ J. Vanderkooy and S. P. Lipshitz | |
| A new distortion measurement ~ R. A. Belcher ~ BBC Research department | |
| Audible amplifier distortion is not a mystery ~ by Peter J. Baxandall | |
| Distortion in low–noise amplifiers ~ Eric F. Taylor | |
| Eliminating adjacent-channel interference ~ P. L. Taylor ~ University of Salford | |
| Non-linear distortion in audio amplifiers ~ M. Otala ~ Oulu Finland | |
| Acoustic noise units ~ James Moir | |
| Self-setting time code clock ~ N. C. Helsby ~ University of Essex | |
| Wideband compander design ~ John Vanderkooy ~ University of Waterloo Ontario | |
| Low–noise low–cost cassette deck ~ John L. Linsley Hood | |
| Transistor driver for valve amplifiers ~ Seth Berglund ~ Lunds University Sweden | |
| Time-code receiver clock ~ A. F. Cross ~ Thames Television Ltd | |
| Current dumping audio amplifier ~ P. J. Walker and M. P. Albinson ~ QUAD 405 | |
| Time by radio ~ D. A. Bateman | |
| Wireless World Dolby noise reducer ~ Geoffrey Shorter | |
| Synthesized communications receiver ~ The Racal RA 1772 ~ R. F. E. Winn | |
| Mains rejection Tracking filter ~ K. F. Knott ~ University of Salford | |
| Reducing Amplifier Distortion ~ A. M. Sandman | |
| Not such a dummy head ~ Artificial head recording ~ D. J. Meares ~ BBC | |
| Baxandall tone control revisited ~ M. V. Thomas | |
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Thyristor control of shunt wound d.c. motors ~ F. Butler
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| Electronic Sound Synthesizer ~ T. Orr B.Sc. and D. W. Thomas Ph.D M.I.E.R.E.. | |
| An approach to audio amplifier design ~ J. R. Stuart M.Sc. ~ Lecson Audio Ltd. | |
| Letters to the Editor July 1973 | |
| Frequency Shifter For "Howl" Suppression ~ M. Hartley Jones | |
| Audio Power Amplifier ~ P. L. Taylor ~ M.A. University of Salford | |
| Circards—7 Power Amplifiers ~ J. Carruthers ~ J. H. Evans ~ J. Kinsler ~ P. Williams | |
| Distortion Reducer ~ D Bollen | |
| The Semiconductor Story ~ K. J. Dean ~ G. White ~ Transistor 25th anniversary | |
| The Wireless World Desk Calculator ~ Roger Alexander ~ Brian Crank | |
| Letter From America ~ Quadraphonic systems JVC-RCA CBS SQ ~ G. W. Tillett | |
| Linearity of the Transistor Amplifier ~ W. T. Cocking | |
| Low-noise Audio Amplifiers ~ H. P. Walker | |
| The Transmission—line loudspeaker Enclosure ~ A. R. Bailey | |
| London Audio Fair 1971 ~ Review of a show attended more than 70,000 | |
| Electrostatic Headphone Design ~ Philip D. Harvey | |
| The Liniac ~ John L. Lindsey Hood | |
| Charging ~ A further look at CR coupling ~ 'Cathode Ray' ~ M. G. Scroggie | |
| Ceramic Pickup Equalisation ~ B. J. C. Burrows | |
| Stereo Mixer ~ H. P. Walker B.A. ~ A good phono stage albeit with feedback | |
| FM Stereo Tuner ~ L Nelson-Jones | |
| Low Distortion Tone-control Circuit ~ P M Quilter | |
| High-gain Audio Voltage Amplifier ~ D Leblebici | |
| New Approach to Class B Amplifier Design ~ Peter Blomley ~ Plessey | |
| Negative Feedback in Transistor Amplifiers ~ S. W. Amos ~ BBC | |
| The Boxcar Detector ~ J. D. W. Abernethy | |
| Simple Class A Amplifier and Modular Pre-amp ~ John L. Linsley Hood | |
| The Design and Use of Moving—coil Loudspeaker Units ~ E. J. Jordan | |
| 15-20W Class AB Audio Amplifier ~ John L. Linsley Hood | |
| Noise in Transistors ~ F. N. H. Robinson M.A. D.Phil. | |
| Class Distinction in Audio Amplifiers ~ John L. Linsley Hood | |
| Communications Receivers ~ Pat Hawker ~ G3VA | |
| Low-cost Horn Loudspeaker System ~ ToneBurst | |
| Dynamic Range versus Ambient Noise ~ George Izzard O'Veering | |
| Tone–Balance Control ~ R. Ambler ~ The QUAD Tilt control explained | |
| Stereo Gramophone Pickups ~ Stanley Kelly | |
| Low–Cost 15-W Amplifer ~ Ian Hardcastle of Texas Instruments ltd. and Basil Lane ~ Introduction to the differential pair front end but using a single supply | |
| Modular Pre-amplifier Design ~ John L. Linsley Hood | |
| Simple Class A Amplifier ~ A 10W design ~ J L Linsley Hood M.I.E.E | |
| Solid–State Oscilloscope ~ Michael Phillips | |
| High–quality Electrostatic Headphones ~ J. P. Wilson ~ Keele University | |
| Noise in Transistor Circuits ~ parts 1 & 2 ~ P. J. Baxandall | |
| Voltage Following ~ Peter Williams B.Sc. ~ Paisley College of Technology | |
| Low–cost High–quality Loudspeaker ~ parts 1 & 2 ~ P. J. Baxandall | |
| High Input–impedance Amplifier Circuits ~ T. D. Towers | |
| Stereophonic Image Sharpness ~ H. D. Harwood ~ BBC Research department | |
| 30 Watt High Fidelity Amplifier ~ Arthur R. Bailey | |
| Low Distortion Class B Output ~ QUAD 303 output tripples explained | |
| Developments in Microphones ~ H. D. Harwood ~ BBC Research Dept. | |
| Wide–range General Purpose Signal Generator ~ L. Nelson–Jones | |
| New B.B.C. Monitoring Loudspeaker ~ H. D. Harwood ~ BBC Research Dept. | |
| Electronics in Concorde | |
| Wireless World Digital computer ~ Part 1 | |
| A Stereo Decoder ~ D. E. O'n. Waddington ~ Marconi Intruments Ltd. | |
| A.F. Amplification with the Cascode ~ G. A. Stevens | |
| Wireless World June 1966 | |
| Letters to the Editor ~ WW December 1966 ~ Current sources | |
| Letters to the Editor ~ WW September 1966 ~ Current sources | |
| Transistor High Quality Amplifier MkII ~ J. Dinsdale | |
| New Low-Noise Transistor Circuit for Electrostatic Microphones ~ P. J. Baxandall | |
| Colour Television Systems ~ P. R. Darrington | |
| Transient testing of A.C. Amplifiers ~ R. C. Bowes | |
| New Phase Splitter ~ A. R. Bailey ~ Radford MA12 MA15 | |
| Splitting the Load ~ O. Greiter | |
| Transfer Functions ~ M. G. Scroggie ~ 'Cathode Ray' | |
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Transistor Audio Power Amplifier ~ R. Tobey and J. Dinsdale
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| Parametric Amplication with Transistors ~ Ulrich L. Rohde | |
| Automatic Wavemeter Calibration ~ D. P. Thurnell | |
| Disc Recording Characteristics ~ J. D. Smith ~ Letters to the Editor ~ W. H. Livy E.M.I. Studios London ~ Formulae for calculating lumped RIAA equalisation | |
| Cascode A.F. Amplifier ~ Long—tailed cascode pair ~ L. B. Hedge | |
| The Nyquist Diagram at Work.pdf ~ 'Cathode Ray' | |
| UL Output Transformers ~ D. M. Leakey and R. B. Gilson | |
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| Neon F.M. Tuning Indicator ~ John D. Collinson ~ QUAD FM Tuning indicator | |
| Valve Curve Diagrams ~ M. G. Scroggie ~ 'Cathode Ray' | |
| Measurement of Non~Linearity Distortion ~ M. G. Scroggie ~ 'Cathode Ray' | |
| Wide Range Electrostatic Loudspeakers ~ with Negligible Distortion ~ P. J. Walker | |
| More Distortion ~ What Causes Musical Unpleasantness? ~ 'Cathode Ray' | |
| Distortion ~ "Cathode Ray" ~ Output Transformer Design ~ R. F. Gibson | |
| Valve Codes ~ M. H. N. Potok ~ What valve numbers mean by manufacturer | |
| Further notes on ~ How to Choose a Valve ~ Thomas Roddam | |
| Amplifiers and Superlatives ~ D. T. N. Williamson and P. J. Walker ~ QUADII | |
| Valve Voltmeter – without calibration drift ~ M. G. Scroggie ~ 'Cathode Ray' | |
| The Williamson Amplifier ~ Articles reprinted from Wireless World 1947~1952 | |
| Preface to Wireless World July 1951 ~ The search for Audio Nirvana at this time | |
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Intermodulation Distortion in Gramophone Pickups ~ S. Kelly
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Loudspeaker Diaphragm Control ~ J. Moir
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| Gramophone Turntable Speeds ~ G. F. Dutton ~ E.M.I. Engineering Development | |
| How to Choose a Valve ~ Thomas Roddam ~ gm/Vg curves and distortion | |
| Phase-Shift Oscillators ~ W. G. Raistrick ~ PYE Cambridge Ltd. | |
| Bass Without Big Baffles ~ K. A. Exley | |
| Solving Parallel Problems ~ D. A. Pollock ~ BBC Engineering Division | |
| Negative Feedback ~ E. Griffiths ~ BBC Engineering Division | |
| Preferred–Value Attenuators ~ E. W. Berth–Jones | |
| Electronic Circuitry ~ Coupling d.c. Amplifiers ~ J. McG. Sowerby | |
| Electronic Circuitry ~ Some notes on Phase Splitters ~ J. McG. Sowerby | |
| High–Quality Amplifier: New Version ~ D. T. N. Williamson ~ Ferranti research | |
| Push-Pull Input Circuits ~ Part2 ~ Cathode follower phase splitter ~ W. T. Cocking | |
| The Cathode Follower ~ What it does and how it does it ~ "Cathode Ray" | |
| The See–Saw Circuit ~ A Self balancing phase splitter ~ M. G. Scroggie | |
| Phase–Splitting in Push–Pull Amplifiers ~ W. T. Cocking |
"Nothing here but history ~ Can you see what has been done"