Binaural Public Address, Charles F. Adams. Feb. 24. Binaural Radio Broadcasting, Harold T. Sherman. Jan., 14. Great Mystery of Dannemora Dungeon, Emory Cook. Oct. 50. Two-Channel Conversion for AM-FM Receivers, C. G. McProud. Jan., 25. System Design It Can Be Attractive, C. G. McProud. Nov., 30. Matched Line of Hi-Fi Sound Equipment, Harry F. Olson. Aug., 29. Simplified Program Switching Panel, Harold Reed. Feb., 25. Tools for Building Temples of Tone. Oct., 54. Tone Controls Flexible Tone-Control Circuit, Basil T. Barber. Sept., 29. Selection of Tone-Control Parameters, Edgar M. Villchur. Mar., 22. Three-Channel Tone-Control Amplifier, Joseph F. Dundovic. Apr., 28. Three-Element Bass Control, Glen Southworth. Oct., 24. Transformers Audio Transformer Design, N. H. Crowhurst. Feb., 26. Making the Best of an Audio Transformer, N. H. Crowhurst. Jan., 40. Output Transformer Design Considerations, AUDIOLOGY. Apr., 14. Tubes Power Tube Figure of Merit, Warren G. Bender. Mar., 21. Volume Controls, A Note on, Charles P. Boegli. Apr., 40.

S U B E J C T

I N D X E
Accurate design of phono equalizers; Charles F. Hempstead and Hamilton Barhydt. I, Aug, 22; II, Sept, 24. ACOUSTICS Sound diffusion in rooms; M. Rettinger. Aug, 19. Adventures with a bass reflex; Milton S. Snitzer. Jan, 26. Allen organ, The; Richard H. Dorf. July, 20. AMPLIFIERS Bandwidth; AUDIOLOGY, Feb, 12. Control unit for the Williamson, A; Charles R. Miller. Sept, 19. Dual-channel control amplifier for stereophonic systems; Wayne B. Denny. May, 17. Juke Box goes hi-fi, The; C. G. McProud. Dec, 33. Medium power tetrode amplifier with stabilized screen supply; Cullen H. Macpherson. Feb, 30. New Golden Ear amplifier; Joseph Marshall. I, Jan, 17; II, Feb, 22. Low distortion tone-control amplifier; W. B. Bernard. Aug, 17. New amplifier has bridge-circuit output; D. J. Tomcik and A. M. Wiggins, Nov, 17. Simple high-quality phono amplifier; R. D. Middlebrook. Aug, 20. Simplexing a standard amplifier; R. S. Houston. Nov, 36. Some experiments with miniature power tubes; Geoffrey H. Grey. Apr, 19. Transformerless 25-watt amplifier for conventional loudspeakers; D. P. Dickie, Jr. and A. Macovski. June, 22. Transient response of audio amplifiers; AUDIOLOGY. Mar, 10. Transistor phono preamp for magnetic pickups; Basil T. Barber. Oct, 38. Transistor remote amplifier, A; Paul Penfield, Jr. Sept, 26. Variable damping factor control; Charles A. Wilkins. Sept, 31. At Home with AUDIO, Lewis C. Stone. I, Apr, 28; II, May, 22; III, June, 24; IV, July, 28; V, Dec, 26. ATTENUATORS Chart of resistor values for L-pads, H. Peter Meisinger. Nov, 25. AUDIO AUDITIES, Saul J. White. I, May, 55; II, June, 27; III, July, 12; IV, Aug, 74. AUDIOLOGY, W. R. Ayres Amplifier bandwidth. Feb, 12. Feedback from output transformer tertiary. Jan. 10. Transient response of audio amplifiers, Mar, 10.

AMPLIFIER Amplifier performance: specifications and e v a l u a t i o n ; Herman Burstein. Feb. 24. A m p l i f i e r using the new 6CZ5's ; Nathan Grossman. July 23. Auto audio system ; William B. Fraser. Mar. 19. Compact two-channel amplifier for stereo systems; C. G. McProud. Aug. 54. Damping factor chart; Phil Phillips. Nov. 24. For stereothe bi-ortho output circuit; C. Nicholas Pryor. Nov. 22. High-power audio amplifiers ; Mannie Horowitz. Mar. 34. H y b r i d feedbacks for power amplifiers; Herbert I. Keroes. Sep. 30. Improving the tape amplifier; Herman Burstein and Henry C. Pollak, July 17. Integrated audio monitor for home and studio use; Ronald L. Ives. Apr. 24. "Isodyne" phase splitter; E. F. Worthen, Aug. 26. Low-distortion 50-watt amplifier; W. I. Heath and G. R. Woodville. Jan. 19. Measurement of amplifier internal impedance; W. H. Anderson. Sep. 22. Simplified audio a m p l i f i e r ; R. G. Chaplick. Oct. 24. Stereo compatibility translator; Herbert M. Honig. Aug. 24. Stereophonic recording and playback amplifier ; Wayne K. Denny. Sep. 24. Three channel remote amplifier; Albert Stratmoen. June 24. Transients in feedback amplifiers; George Fletcher Cooper. Mar. 31. Two-way stereophonic a m p l i f i e r ; B. B. Bauer. J. M. Hollywood, and G. P. Maerkle. Oct. 19. Variable stereo suppresion control; John E. D'Errico. Aug. 23. BELL TELEPHONE SYSTEM REPRINTS Hearing, the determining factor for h i g h fidelity transmission; Harvey Fletcher. July 24, Aug. 45, Sep. 34. Loudnessits definition, measurement, and calculation; Harvey Fletcher and W. A. Munson, Jan. 32, Feb. 34. New system of sound recording; H. C, Harrison. May 34. Universal phonograph reproducer; H. A. Henning. Mar. 40. BOOK REVIEWS Music and the western m a n ; ed. by Peter Garvie. Oct. 12. Tape Recorder Circuits; Herman Burstein and Henry C. Pollak. Feb. 55. CABINET Design of a high-quality stereo console; R. A. Joss. Nov. 38. CONTROLS Complete tone compensator; Robert M, Voss. June 18. Improved loudness control; J. P. Wentworth. Jan. 30. DAMPING FACTOR Damping factor chart; Phil Phillips. Nov. 24. DISTORTION Feedback and distortion; George Fletcher Cooper. Feb. 30. ELECTRONIC SWITCH Simple electronic switch ; P, Cremaschi. Feb. 26. ENCLOSURES Compart ultra-linear speakers for stereo; Vic-tor Brociner. Aug. 38. Compass-1a new loudspeaker design; Milton D. Thalberg. Apr. 34. Custom-built corner horn enclosures; Laurent Gagnon. Feb. 20. Improvement, in "air suspension" sneaker enclosures with tube venting; Philip B. Williams and James F. Novak. Nov. 18. EQUALIZATION Equalisation in tape recorders; Herman Burstein. Mar. 28. EQUIPMENT REVIEWS Aero Ultra-Linear II Amplifier. Dec. 42. Ampex stereo system. Mar. 48. Audio Tech speaker. Oct. 52. Baker 12" loudspeaker. June 34, Connoisseur pickup and phono arm. Feb. 36. Conrac Fleetwood TV. Mar. 52. EICO HFT-90 FM tuner kit. June 36. ESL Series 60 pickup. Apr. 42. Fairchild 248 stereo amplifier. Dec. 46. General Electric stereo cartridges. Dec. 45. Glaser-Steers GS-77 changer. Apr. 39. Harman-Kardon A-224 stereo amplifier/preamplifier. Nov. 46. F-10 FM tuner. Sep. 44, Oct. 56. Heathkit EA-2 amplifier. July 30. W-6M amplifier. Jan. 42. ISI A-10 speakers. Feb. 36. KLH speaker line. May 38. Karg "Tunematic" FM tuner and multiplex/ stereo units. Oct. 54. Lektrostat record cleaner. July 30. Madison Fielding 320 stereo amplifier and 330 stereo tuner. Sep. 42. Miracord XS-200 changer. June 34. Neshaminy Z-200 speaker system. Mar. 52. Pentron tape-recording equipment. June 36. Pickering ''Isophase" loudspeaker. Jan. 42. Pilot SP-125 stereo preamplifier and SM-244 stereo amplifier. June 38. Sargent-Rayment 300-M70 FM tuner and 70watt amplifier combination. Feb. 38. Scott 135 Stereo-adaptor. May 39. Shure 330 and 430 microphones. Jan. 46. Tannoy "Belvedere" speaker. Oct. 56. Tandberg Model 3-Stereo tape recorder. July 28. Telematic speaker. Oct. 52. United Speaker Systems' X-100 speaker. Nov. 46. Viking 85 tape deck and RP-61 amplifier. Dec. 43. FANTASY New steampax recorder; Llessur Mahknit. Oct. 28. FEEDBACK Feedback and distortion; George Fletcher Cooper. Feb. 30. Hybrid feedbacks for power amplifiers; Herbert I. Keroes. Sep. 30. Transients in feedback amplifiers; George Fletcher Cooper, Mar. 31. FILTERS Comb filters, anyone? hurst. June 17. Norman II. CrowTransistor beta tester with linear scale; Sergio Bernstein. July 21. Understanding the db, dbm, and the VU; Julian L. Bernstein. Nov. 30. VU meter in tape recording; Herman Burstein. Dec. 17. MICROPHONES M-S stereophony and compatibility; Gerhart Bore and Stephen F. Temmer. Apr. 19. MIXER Ten-channel audio mixer-preamplifier; Harold Reed. Jan. 27. MULTIPLEX Compatible stereo multiplex a d a p t e r ; Leonard Feldman. Oct. 30, Nov. 42. FM/Multiplex converter; Harold R. Day. Aug. 19. Questions and answers on stereo and m/x; Louis J. Kleinklaus. Aug. 20. NETWORKS EC filter design for high impedance crossover networks; Charles W. Harrison, Jr. Nov. 34. Use of twin-t type networks; Norman H. Crowhurst. May 19. PATENTS Trinity of the patent lawinvention, novelty, and utility; Albert W. Gray. Mar. 44. PHONOGRAPH EQUIPMENT Adapting a Garrard changer to stereo pickups ; May 32. Convert y o u r Collaro to stereo; Stanley G. Neufeld. Aug. 42. PHONOGRAPH PICKUPS How to make a stereo pickup; C. G. McProud. Feb. 17. Manufacture of a high-quality cartridge; Ruben E. Carlson. Aug. 30. Toward an optimum stereo cartridge; Herbert H. Horowitz. Oct. 44. Universal phonograph reproducer; H. A. Henning. Mar. 40. PREAMPLIFIERS Complete tone compensator; Robert M. Voss. June 18. Paging preamplifier; Mannie Horowitz. Apr. 22. Simplified control unit; R. G. Chaplick. Sep. 17. Ten-channel audio m i x e r - p r e a m p l i f i e r ; Harold Reed. Jan. 37. PSYCHOACOUSTICS Hearing, the determining factor for highfidelity transmission; Harvey Fletcher. July 24, Aug. 45. Sep. 34. Londnessits definition, measurement and calculation; Harvey Fletcher and W. A. Munson. Jan. 32, Feb. 34. Standing wavesan audio booby t r a p ; William D. Bell. Oct. 22. RECORDING, DISC Compatible stereophonic record; B. B. Bauer, Peter C. Goldmark, and William S. Bachman. May 26. Improving the performance of stereophonic disc playback systems; B. B. Bauer. Aug. 34, New approach to stereo discs; Maximilian Weil. June 28. New electromechanical method of matrixing the two components in stereophonic disc recording; Hans-Joachim Klemp. Horst Redlieh, a n d Stephen F, Temmer. Nov. 26. New sytems of sound recording; II. C. Harrison. May 34. Phasing in stereophonic recording; William S. Bachman. Nov. 17. RECORDING, TAPE Equalization in tape recorders; Herman Burstein. Mar. 28. Improving the tape amplifier; Herman Burstein and Henry C. Pollak. July 17. Stereophonic recording and playback amplifier; Wayne B. Denny. Sep. 24, Tape tensionthe neglected dimension ; Erwin J. Saxl. Dec. 34.

kle. Oct. 19. Variable stereo-suppression control; John E. D'Errico. Aug. 23.
SYSTEMS Auto audio system ; William B. Fraser. Mar. 19. Hi-fl with that coffee aroma; Edwin A. Snape. Dec. 20. Sound recording and reinforcing at the Monterey jazz f e s t i v a l ; Russell J. Tinkham. Dec. 22. Trends in audio ; Herman Burstein. Apr. 28. TRANSIENTS Testing for transients; George Fletcher Cooper. Apr. 26. Transients in feedback amplifiers; George Fletcher Cooper. Mar. 31. TRANSISTORS Amateur sound film equipment; H. Thiele. Jan. 24. Simple transistor tester; Richard Burwen. May. 30. Transistor beta tester with linear scale; Sergio Bernstein. July 21.
AMPLIFIERS Amplifier distortion story; Norman H. Crowhurst. Apr. 35, May 24. Determining grid No. 2 dissipation in ultralinear amplifiers; Leonard Kaplan. Dec. 24. Eight-position mixer; Morris Dollens. Apr. 25. Low-loading self-biased amplifier; L. B. Dalzell. Dec. 19. "Panphonic" stereo control amplifier; George Manning Lewis. Sep. 44. Purple cow; J. C. Witherspoon. Jan. 30. Push-pull in hi fi; Manuie Horowitz. Apr. 19. Puzzled about amplifiers? Norman H. Crowhurst. Nov. 24. Realistic audio engineering philosophy; Norman H. Crowhurst. Oct. 52. Realistic bass without "boom;" Bruno Staffen. Feb. 21. 60-watt power amplifier with a silicon rectifier power supply; L. H. Dalzell. Mar. 36. Standard methods of measurements for amplifiersIHFM-A-200. Oct. 26. "Stereo-Plus" system; Richard Shottenfeld and Walter Staudt. Oct. 23. Technique of measuring I.M. distortion in audio amplifiers; Leon Kuby. Oct. 64. Ten-watt all-triode a m p l i f i e r ; Robert M. Voss and Robert Ellis. Sep. 40. Transistorized hi-fi preamplifier; Ernest Severin. Dec. 48. Transistorized microphone preamplifier; Horace E. West. Nov. 50. Transistorized remote-broadcast a m p l i f i e r ; C. M. Edmonds. Jan. 24. TW/PA2a comprehensive tape preamplifier; A r t h u r W. Wayne. Jun. 17. Universal stereo control center; Francis A. Gicca. Nov. 19. Variable electronic crossover and b i a m p l i fier; George C. Kane. Aug. 42. ATTENUATORS Parabolic a t t e n u a t o r ; H. A. Schwan. Dec. 25. BOOK REVIEW The Audio Cyclopedia ; Howard Tremaine. Aug. 99. BROADCASTING A compatible stereophonic sound system; Floyd K. Becker, May 17. Double-duty disc-hop consolette; John Whitacre. Feb. 30. Transistorized remote-broadcast amplifier, C. M. Edmonds. Jan. 24. CONTROLS A continuously variable stereo dimension control; Peter A. Stark. Jul. 22. Stereophonic tape recorder control; R. A. Greiner. Dec. 28. Universal stereo control center; Francis A. Gicca. Nov. 19. CROSSOVERS Choice of a crossover frequency; James Moir. Apr. 22. Variable electronic crossover and biamplifier; George C. Kane. Aug. 42. DAMPING FACTOR Direct-read ing damping-factor meter; W. H. Anderson. Jan. 22. DECIBELS Decibelfact or fable? Walter R. Westphal. Mar. 27. DISTORTION Amplifier distortion Story; Norman H. Crowhurst. Apr. 35, May 24. Loudspeaker distortion due to the Doppler effect; Virginia Rettinger. Jul. 28. Technique of measuring I.M. distortion in audio amplifiers; Leon Kuby. Oct. 64. Transformer distortion; Dunford Kelly. Feb. 38, Mar. 42. ENCLOSURES Calculation chart for vented cabinets; Victor Brociner. Nov. 22. Design of the wide-range ultra-compact Regal speaker system; Robert C. Avedon, Jack E. Burchfield, and Wayne Kooy. Mar. 22. Hi-fi for lo-do; S. G. Lucas. Aug. 50. Hi-fi speaker enclosure damping materials; James A. Huff, Jr. Aug. 26. New high fidelity loudspeaker enclosure; W. J. D. Van Dijck. Jan. 27. Realistic baas w i t h o u t "boom"; Bruno Staffen. Feb. 21. Simple single-cabinet corner stereo speaker; C. G. McProud. Jan. 19. Speaker system for perfectionists; James A Mitchell. Nov. 52. EQUIPMENT PROFILES Acoustic Research AR-3 loudspeaker; Dec. 64. Ampex 960 stereo tape equipment; Jul. 40. 880 stereo microphones; Jul. 44. 881 headphones; Jul. 44. Arkay AM-5 AM tuner kit; Apr. 48. Bell "Carillon" stereo preamplifier/amplifier; Mar. 48. Blonder-Tongue Audio Baton; Feb. 48. Collaro "Constellation" record changer; Oct. 76. Connoisseur Type B transcription turntable; Jun. 40. Dual Model 1006 record changer; Jun. 38. Dynakit stereo control; Feb. 46. Dynakit "Stereo 70" stereo amplifier; Sep. 54. EICO HF85 stereo preamplifier; Dec. 66. Fisher 400 stereo preamplifier; Jan. 44. X101A stereo preamplifier/amplifier; Nov. 64. General Electric MS-4000 "Stereo Classic" stereo preamplifier/amplifier; Jan. 40. Glaser-Steers record changer cover; Jun. 42. Harman-Kardon A250 stereo amplifier; Apr. 42. Hartley 217-Duo stereo speaker; Apr. 47. Jensen "Galaxy II" stereo speaker system; Oct. 74. Kingdom "Omega" speaker system ; Jun. 42. Knight KN-120 DeLuxe stereo tuner; Jan. 48. Knight-Kit 83YX776 stereo preamplifier; Mar. 50. Koss stereo headphones; Nov. 62. Lafayette KT-600 stereo preamplifier; May 34. Leak amplifier line; Sep. 50. Lesa CD2/21 record changer; Jul. 46. Madison Fielding Series 360 Master Stereophonic Console; Dec. 64. Microlift phono tone arm control; Jun. 42. Pilot SP-216A stereo preamplifier; Sep. 48. Precise Mark XXIV "Integra" stereo preamplifier/amplifier; Jul. 44. Reslo ribbon microphones; Jan, 46. Sargent Rayment line; Oct. 72, Scott 299 Stereo amplifier; Nov. 59. 222 stereo amplifier; Nov. 62. Sony TFM-151 AM-FM transistor portable; Jan. 42. Sony Sterecorder tape machine; Dec. 60. Tandberg Model 5-2 stereo tape machine; Apr. 46. Telectro Series 900 tape decks; Feb. 50. Uher Universal tape equipment; Oct. 74. University TMS-2 "Trimensional" stereo speaker; Sep. 50. FANTASY Elimination networks for hi-fi systems; Daniel R. Butterly. Jan. 40. What is high fidelity? J. Gordon Holt. Oct. 45. FILTERS Transistorized band-pass filter; Charles R. Miller. Oct. 24. INSTRUMENTS Audio oscillator circuits, old and new; Norman H. Crowhurst. Jul. 23. Series-tuned push-pull oscillator; B. J. Cuddy. Nov. 48. Visual stereo monitoring; George L. Foster and Burwell Graham. Nov. 45. LAW Errors and mistakes of engineers; Albert Woodruff Gray. Aug. 56, LOUDSPEAKERS Calculation chart for vented cabinets; Victor Brociner. Nov. 22. Choice of crossover frequency; James Moir. Apr. 22. Design of the wide-range ultra-compact Regal speaker system; Robert C. Avedon, Jack E. Burchfield, and Wayne Kooy. Mar. 22. Hi-fi for lo-do; S. C. Lucas. Aug. 50. Hi-fi speaker enclosure damping materials; James A. Huff, Jr. Aug. 26. High-fidelity performance from small speakers; Charles F. Mahler, Jr. Dec. 22. Loudspeaker distortion due to the Doppler effect; Virginia Ret linger. Jul. 28. New high fidelity loudspeaker enclosure. W. J. D. Van Dijck. Jan. 27. Realistic bass without "boom;" Bruno Staffen. Feb. 21. Simple single-cabinet corner stereo speaker; C. G. McProud. Jan. 19. Speaker phasing with an oscilloscope; Bob E. Tripp. May 10. Speaker system for perfectionists; James A. Mitchell. Nov. 52. "Trimensional" speaker system; Victor Brociner. Jun. 21. MEASUREMENTS Audio oscillator circuits, old and new; Norman H. Crowhurst. Jul. 23. Decibelfact or fable? Walter R. Westphal. Mar. 27. Direct-reading damping-factor meter; W. H. Anderson. Jan. 22. Standard methods of measurements for amplifiers IHFM-A-200. Oct. 26. Standard methods of measurements for tunersIHFM-T-100. May 42, Jun. 48. Technique of measuring I.M. distortion in audio amplifiers; Leon Kuby. Oct. 64, Visual stereo monitoring; George L. Foster and Burwell Graham. Nov. 45. MICROPHONES Acoustic-front damping in dynamic microphones; W. T. Fiala. Mar. 28 Microphones for recording; Herman Bur stein. Oct. 32. Transistorized microphone preamplifier; Horace E. West. Nov. 50. MIXERS Eight-position m i s e r ; Morris Dollens. Apr. 25. MULTIPLEX Heterodyne FM multiplex adapter; W. B. Bernard. Dec. 50. What about stereo multiplexing and matrising? Norman H. Crowhurst. Sep. 26. NOISE Radio interference in audio equipment; John C. Rice. Jul. 27. PATENTS Contributory infringement of patents; Albert Woodruff Gray. Sep. 24. Reduction to practicea patent essential; Albert Woodruff Gray. Apr. 40. PHASING Speaker phasing with an oscilloscope; Boh E. Tripp. May 10. PHONOGRAPH EQUIPMENT Magnetic counteran essential component; John E. Turner, Jan. 28. PHONOGRAPH PICKUPS Loading the piezoelectric cartridge; Herman Burstein. Mar. 21. Moving-magnet stereo; Herbert Horowitz. May 19. POWER SUPPLIES 60-watt power amplifier with a silicon rectifier power supply; L. B. Dalzell. Mar. 36. PRODUCT PREVIEW Amplifiers and preamplifiers. Aug. 67. Arms. Sep. 74. Loudspeakers. Aug. 74. Microphones. Sep. 75. Miscellanous. Aug. 111, Sep. 80. Record changers. Aug. 79. Stereo cartridges. Sep. 70. Tape accessories. Aug. 110. Tape equipment. Aug. 82. Tuners. Aug. 71. Turntables. Aug. 81. PSYCHOACOUSTICS Realistic bass without Staffen. Feb. 21. "boom;" Bruno

HUM Hum chasing is engineering? Norman H. Crowhurst. Dec. 26
LOUDSPEAKERS Acoustic matrixinga basis for new loudspeaker developments; Norman H. Crowhurst. Nov. 19 Audio power requirements and statistics; C. Nicholas Pryor. Dec. 46 Bi-phonic coupler, Model 440; Abraham Cohen. Mar. 20 Electronic crossover design; Norman H. Crowhurst. Sept. 19 Linearity of acoustic-suspension speakers; Edgar M. Villchur. Jan. 24 More on the air spring and the ultracompact loudspeaker; Robert C. Avedon. June 22 New design chart for bass-reflex enclosures; R. D. Herlocker. Apr. 19 Polystyrene foam loudspeaker cones; P. B. Williams and James F. Novak. May 23 Series-parallel speaker array; Charles F. Mahler, Jr. Nov. 54 What's a good loudspeaker? L. G. Bostwick. Jan. 22 1.02 cubic feet and 45 cps; R. Sequerra. Aug. 20 MEASUREMENTS Junk-box FM alignment u n i t ; Allen R. Greenleaf and Charles H. Chandler. Dec. 23 MICROPHONES Microphone calibration; Daniel P. Peters. Aug. 19 New microphone has unique directivity; Harold S. Mawby. Apr. 26

DECEMBER, 1960

Distortion in tape recording; May 32, June 36 Equalization; Herman Burstein. Aug. 28 Improving the signal-to-noise ratio; Herman Burstein. Jan. 34, Feb. 33 Maintaining frequency response in recorders ; Herman Burstein. Mar. 28, Apr. 30 More about tape heads; Herman Burstein. J u l y 28 Stereo considerations. Herman Burstein. Nov. 32 Tape's future; Herman Burstein. Dec. 32
STEREO REPRODUCTION Aural zero nullfor stereo balancing; Leonard Feldman. Feb. 24 Converting the Grundig to stereo; William G. Dilley. May 38 Second thoughts on stereo; Norman H. Crowhurst. Feb. 19 SYSTEMS Be professionalrack mount; William G. Dilley. Nov. 42 Development of a tailored sound system; Fred Gordon. July 26 Engineer's high fidelity system; R. A.
Greiner. Nov. 22, Dec. 36 Start with monobuild up to stereo; C. F. Barton. Aug. 22 TRANSFORMERS Output transformers; James; Moir. Feb. 30, Mar. 34
Transistorized stereo phono preamp; W. B. Bernard. June 19 Transistorized stereo control unit; Richard Y. Moss. Oct. 19
AMPLIFIERS Amplifiers with positive and negative feedback; Charles P. Boegli. Apr. 18. Another power amplifier! R. A. Greiner. Sept. 19. Feedback techniques in low-level amplifiers; Donald L. Shirer. May 19. Stereo-plus-center to two recording channels; Harold Reed. Nov. 28. Switching mono to stereo, to stereo plus center; Harold Reed. Sept. 50. Triode operation of KT88's; Robert M. Voss and Robert Ellis. Mar. 30. Vacuum-tube OTL a m p l i f i e r ; M. W. P. Strandberg. Dec. 18. BOOK REVIEW "Noise Reduction," Leo L. Beranek, editor. June 68. BROADCASTING Low-cost stereo conversion for studio console; C. G. McProud. Nov. 44. CABINETRY A case for the custom console; F. H. Jackson. Feb. 18. COMPUTERS Computers in audio design; R. G. Buscher. I, Feb. 22; II, Mar. 22. ENCLOSURES Maximum fun. medium fi. minimum cost; L. F. Goeller. Apr. 38. #4, 80 pounds, a Super-8. and the shim method; John L. Grauer. Jan. 19. EQUALIZATION Interconversions of various equalization terminology; Kenneth Betsh. Mar. 19. Equipment failure alarms; Allan M. Ferres. Dec. 42. EQUIPMENT PROFILES Audio Dynamics ADC-1 cartridge; May 52. Altec 838, 845 loudspeakers; Apr. 52. Astatic "Cantata" cartridge 45D; Sept. 62. Bogen RP-40A AM-FM stereo receiver; Oct. 60. Crosby R80 AM-FM stereo receiver; June 48. Dual 1006-Custom record changer; Oct. 64. Dynatuner F M - 1 FM tuner; July 34. EICO ST-40 stereo amplifier; May 50. EICO ST-96 FM-AM stereo tuner; Sept. 60. Electro-Voice Patrician 700 and Stereon 200 speakers; Jan. 39. Empire "Troubador" turntable system; Nov. 62. Ercona "Nordic I" loudspeaker; Feb. 56. Fairchild 440-2 turntable; Feb. 52. Fairchild 510 "Compander"; Nov. 66. Fisher FM-200 FM tuner; May 46. Fisher X-1000 stereo amplifier; Sept. 60. Fisher XP-4 loudspeaker system; J u n e 42. Garrard Type A record changer; May 48. Goodmans "Alpha" speaker system; M a y. Gray 208-S/16 professional phono arm; Oct. 62. Harman-Kardon Citation III tuner kit; Jan. 38. Jensen TF-3 loudspeaker system; July 38. Korting 158S tape recorder; Sept. 58. Lafayette KT-550 power amplifier kit; J u n e 44. Lafayette KT-650 FM-tuner kit; Oct. 59. Lafayette RK120 miniature tape recorder; Mar. 40. Luxor "Magnefon" MP410A tape recorder; Dec. 50. Marantz Model 7 stereo preamp; Apr. 48. Miracord Studio H turntable-changer; Sept. 56. Neshaminy Jan-Kit 41 speaker system k i t ; Mar. 40. Neumann DST stereo cartridge; June 46. Neumann PA2a turntable; June 46. Norelco "Continental 200" tape recorder; Nov. 62. Ortofon SMG-212 phono ami and SPU/ GT stereo cartridge; Dec. 56. Paco RT-45PA stereo tuner kit; Mar. 38. "Realistic" Model 210 stereo power amplifier kit; Dec. 52. Roberts Model 990 tape recorder; J u l y 36. Sargent-Rayment SR-8000 stereo tunerpreamp; Feb. 48. Sargent-Rayment SR-202 reverberation unit; Feb. 48. Schober "Autotuner" organ tuner kit; Dec. 58. Scott LT-10 FM tuner kit; Feb. 54. Scott S-2 loudspeaker system; Oct. 60. Sherwood S-2200B AM-FM stereo tuner; Apr. 46. Shure M212 and M216 Studio Dynetic stereo cartridge and arm; Feb. 50. Sonotone S2 ceramic stereo cartridge; Oct. 62. Sony TFM-121A transistorized portable A M - F M receiver; July 38. Thorens TD-124 turntable; Dec. 54. University Classic II loudspeaker system; Nov. 64. Viking "76 Compact" tape recorder; June 48. Weathers K-834 2-speed turntable and pickup system; Apr. 50. FANTASY AND FICTION Confessions of a high-fidelity widow; Christopher Fay. May 24. One step at a time; Burt Hines. Sept. 54. FEEDBACK Amplifiers with positive and negative feedback; Charles P. Boegli. Apr. 18. Feedback techniques in low-level amplifiers; Donald L. Shirer. May 19. FM-STEREO Filters for FM-stereo; Norman H. Crowhurst. Aug. 26. Signal sampling for FM stereo; R. S h o t t e n f e l d and S. Abilock. Dec. 22. An FM-stereo adapter - the GE System; Antal Csicsatka and Robert M. Linz. June 24. FM-multiplex stereo adapter; Daniel R. von Recklinghausen. J u n e 21. Product detector for FM-stereo; Fred L. Mergner. A u g. 23. S y n c h r o n o u s oscillator FM-stereo adapter; Leonard Feldman. July 25, Timedivision approach to FM-stereo; Carl G. Eilers. A u g. 20. W h a t hath FCC wrought? David Sasl a w. June 18. LOUDSPEAKERS Common-bass stereo speaker system; Francis F. Chen. Nov. 19. Hanging hi-fi system; Harold C. Mangels. Dec. 46. Line Radiator; R. J. Pawlowski. July 1ft. Loudspeaker design; Norman H. Crowhurst. Feb. 36. Loudspeaker magnet design; Norman H. Crowhurst. Sept. 44. Maximum f u n , medium fi, minimum cost; L. F. Goeller. Apr. 38. #4, 80 pounds, a Super-8, and the shim method; John L. Grauer. Jan. 19. Performance of series-parallel speaker arrays; James F. Novak. Sept. 23. "Reflection Coupler" gives stereo spread; Leon J. Knize. June 30. Submarine sonics; Victor L. Brociner. J u l y 22. To phase or not to phase; R. A. Snape. July 32. MUSICAL INSTRUMENTS Electronic organ t u n i n g ; H. D. Herlocker. Dec. 30. The electronic organhigh fidelity musical instrument. David Wolkov. Nov. 35. PATENTS Loss of patent by prior use or sale; Albert Woodruff Gray. Oct. 50. Patent applications and the taint of public use; Albert Woodruff Gray; Mar. 34. POWER SUPPLIES Regulate that voltage; Dilley. Jan. 28.

William G.

PREAMPLIFIERS Designing a transistorized preamp; R. J. Bosselaers. Jan. 24. PSYCHOACOUSTICS Ersatz stereo unlimited; C. H. Malmstedt. Feb. 20. How high is fi? George Fletcher Cooper. May 40. "Sineward" distortion in high fidelity ampliflers; John W. Campbell. Nov. 52. Speaker power; Paul W. Klipsch. Oct. 54. Stereo misconceptions; James C. Cunn i n g h a m ; Sept. 38. To phase or not to phase; E. A. Snape. July 32.

DECEMBER, 1961

The indispensable engineer; H. Crowhurst. May 36.
REVERBERATION Artificial reverberation; Fred L. Mergner. Apr. 28. STEREO Filters for FM-stereo; Norman H. Crowhurst. Aug. 26. Signal sampling for FM stereo; R. Shottenfeld and S. Abilock. Dec. 22. FM-stereo adapter the GE System; A n t a l Csicsatka and Robert M. Linz. June 24. FM-Multiplex stereo adapter; Daniel R. von Recklinghausen. June 21. Product detector for FM-stereo; Fred L. Mergner. A u g. 23. Synchronous oscillator FM-stereo adapter; Leonard Feldman. July 25. Stereo misconceptions; James C. Cunningham. Sept. 38. Switching mono to stereo, to stereo plus center; Harold Reed. Sept. 50. Time-division approach to FM stereo; Carl G. Eilers. Aug. 20.
RECORDING, MAGNETIC Characteristics of tape noise; William B. Snow. Feb. 26. "Fidelimatic" tape recording system; John Whitacre. Oct. 19. Tape copyinghome style; R. A. Joss, Dec. 35. Tape indexing; Jerry Lerner. Jan. 22. Understanding the tape oscillator; Herman Bui-stein and Henry C. Foliate. Feb. 28. RECORDING TECHNIQUES More about recording perspective; William G. Dilley. July 28. Recording perspective; William G. Dilley. Apr. 32. Stage sound; Richard S. Levy. May 26. Stereo-plus-center to two recording c h a n n e l s ; Harold Reed. Nov. 28.
To phase or not to phase? E. A. Snape, July 32. What hath FCC wrought? David Saslaw. J u n e 18. SYSTEMS Low-cost stereo conversion Cor studio console. C. G. M c P r o u d. N o v. 44. A unique motel installation; Bob Kampf. Mar. 20. TEST EQUIPMENT FM sweep alignment unitausterity model; Allen R. Greenleaf. Oct. 42. TRANSISTORS Designing a transistorized preamp; R. J. Bosselaers. Jan. 24. A feel for transistors; L. F. Goeller. Oct. 35. Transistor protector; George Fletcher Cooper. Dec. 38.
AMPLIFIERS Feedbackhead cook and bottle washer! Norman H. Crowhurst. Jan 40. High Fidelity with transistors; George Fletcher Cooper. May 22. High-quality, low-power stereo amplifier; Joseph Giovanelli. July 23. High-quality transistorized stereo preamplifier; Erhard Aschinger. I, Nov 30; II, Dec 36. High-stability feedback amplifier; Arnold J. Kauder. Oct 18. Measuring and matching tape playback and microphone amplifiers; Mannie Horowitz. Sept 42. Power supply with protection; George Fletcher Cooper. June 27. Reduction of feedthrough in audio switching; R. D. Herlocker. Feb. 28. Series Feedback; George Fletcher Cooper. Dec. 34. Taillight transistor-protector; Norman Kramer. Sept 48. The transistor amplifier; George Fletcher Cooper. Feb 23. The transistor amplifier, economy model; George Fletcher Cooper. Apr 24. Transistor output-stage response; George Fletcher Cooper. Oct 62. Transistorized 200-watt stereo amplifier; Richard S. Burwen. Nov 40. ATTENUATORS A 125.5-db 1-megacycle audio attenuator; Weaver Dodge. Dec 23. BLINDNESS and Technology; Joseph Giovanelli. Sept 68. CONTROLS Light-actuated gain control; William G. Dilley, Sept 38. EQUIPMENT PROFILES ADC Pritchard phono arm. Sept 52. AKG Model K-50 headphones. July 33. Dual TG12SK tape recorder. Dec 42. EICO RP-100 stereo tape deck kit. July 34. Electro-Voice Sentry II loudspeaker. Oct 80. EMI Model DLS-529 loudspeaker. Sept 52. Fisher KX-200 stereo amplifier kit. Mar 40. Fisher KM-60 FM-stereo tuner kit. Mar 40. Fisher Model FM-1000 FM tuner. Oct 76. Harman-Kardon stereo tuner amplifier. TA-5000X. July 49. Harman-Kardon Citation A transistorized preamplifier. Oct 75. Harman-Kardon Citation MA FM-stereo adapter. Feb 46. Heathkit Model AD-22 stereo tape recorder. Nov 62. Heathkit Model IO-21 oscilloscope. Mar 43. Isotone "Eroica" loudspeaker. Feb 48. Knight-Kit a.c. vacuum-tube voltmeter, 83YU608. June 38. Knight-Kit KX-60 50-watt transistorized amplifier. Sept 54. Koss Model SP-3 headphones. July 32. Lafayette Model KT-174 vacuum-tube voltmeter kit. Dec 46. Leak "Sandwich" loudspeaker. June 36. Mark-Q-Matic recorder/slide projector synchronizer, Model MQM-1. Apr 44. Omega Model 1600 transistorized amplifier. Mar 44. Permoflux headphones, models B-DHS-28, -17, HS-8. July 32. Pickering stereo cartridge, Model U38-AT. June 38. Pilot Model 602M FM-stereo receiver. Jan 44. Pioneer Model SE-1 headphones. July 33. Rek-O-Kut Autopoise kit. Feb 48. H. H. Scott LK-48 stereo amplifier kit. Apr 40. H. H. Scott LT-110 FM-stereo tuner kit. Apr 42. H. H. Scott Model S-3 speaker system. Mar 44. Sharpe "Live Tone" headphones. July 33. Sherwood Model SR-3 loudspeaker system. Apr 44. Shure-SME phono arm. Nov 64. Shure Model M33-5 stereo cartridge. Nov 66. Telefunken Magnetophone 97 tape recorder. Jan 44. Telex Model HPD53A headphones. July 33. Thorens Model TD-135 turntable and arm. Sept 50. Transis-Tronics FM-15MX stereo tuner. Apr 47. Weathers "66" turntable and pickup system. Oct 78. FANTASY Single-speaker Apr 18. stereo, L. H. Garner; LOUDSPEAKERS Another word on multiple speakers; John W. Ward. Dec 19. Thirty pounds of Magnet and an 18-tnch cone; S. Robert Russell. July 19. MEASUREMENTS Audio measuring equipment; Mannie Horowitz. Jan 19. Evaluating signal-to-noise ratio; Herman Burnstein. Apr. 26. The frequency-response specification; Mannie Horowitz. Mar 24. Measuring and matching the phono equalization curve; Mannie Horowitz. Aug 24. Stereophonic test record for evaluating systems; B. B. Bauer. G. Sioles, A. Schwartz, A. Gust. Feb 18. Test equipment roundup; David Saslaw. Jan 23. MIXERS A condenser microphone mixer; William G. Dilley. Oct 48. High-quality stereophonic mixer; Robert Gerbracht. Mar 19. MOTORS Electronic speed control for hysteresissynchronous motors; Harold W. Wiebe, Apr 20. MUSICAL INSTRUMENTS Electronic organ tone generators; D. Wolkov. I, Feb 34; II, Mar 30. Extending the usefulness of the Schober Autotuner; Winthrop S. Pike. Oct 68. The Hamograph, a new approach to electronic music; J. W. Berridge. Oct 23. PHONO REPRODUCTION Measuring and matching the phono equalization curve; Mannie Horowitz. Aug 24. New turntable-arm design; Edgar Villchur. I, Sept 19; II, Oct 34. Phono curve data for Indolent engineers; Bruno Staffen and Johan van Leer. Sept 46. Setting the stage for opera; R. Katz. June 43. Vertical tracking anglea source of IM distortion; B. R. Madsen. Nov. 21. POWER SUPPLY with protection; George Fletcher Cooper. June 27. PRODUCT PREVIEW SECTION; August issue. PSYCHOACOUSTICS Effect of phase shift on hearing; R. Klein and J. Tributsch. July 36. Prelude for the we 11-tempered clavichord, not well tempered; Harold Tornheim. Oct 42. RECORDING, DISC Inner-groove distortion; R. S. Oakley, Jr. June 32. Stereophonic test record for evaluating systems; B. B. Bauer, G. Sioles, A. Schwartz, A. Gust. Feb 18. Vertical tracking anglea source of IM distortion; E. R. Madsen. Nov 21.

ACOUSTICS A "Purist" Tackles Room Acoustics; J. W. Linsley. April p. 19. AMPLIFIERS A Direct Approach to Q-Point Stabilization; Frank W. Brands. April p. 44. A Houseful of Hi PI; Herbert M. Honig. March p. 42. A New Triode Amplifier; Robert M. Voss and Robert Ellis. July p. 22. All Silicon Tape Playback Preamps and Recording Circuit; John Abajian and Dwight V. Jones. Oct. p. 22. Class-D for Efficiency; Peter A. Stark. Part I, June p. 23; Part II, July p. 24; Part III, Aug. p. 23. Intermodulation DistortionPros, Cons, and Hows; Mannie Horowitz, Jan. p. 38. Low-Cost High-Performance Volume Compressor; S. S. Andrews, Dec. p. 19. Power; Mannie Horowitz, March p. 25. The El Cheapo 2-30; R. R. Moore, Nov. p. 19. CROSSOVERS Transient Performance of Loudspeaker Dividing Networks; Robert M. Mitchell. Jan. p. 24. CURVE PLOTTING A Note on Curve Plotting; Virginia Rettinger. Sept. p. 24. DISTORTION Bad Sound Prom Great Composers; Lewis A- Harlow. Feb. p. 21. Intermodulation DistortionPros, Cons, and Hows; Mannie Horowitz. Jan. p. 38. Reducing Distortion in Stereo Phonograph Systems; J. G. Woodward, Part I, Feb. p. 23; Part II, March p. 28. Transient Generators for Audio Testing; John L. Grauer, Sept. p. 22. EQUIPMENT PROFILES Acoustic Research ADC Loudspeaker, Brentwood 303A; Nov. p. 68. ADC Stereo Pickup, Point Four; March p. 52. Altec Lansing Stereo Amplifier Model 360A; April p. 40, Ampex Stereo Tape Recorder Model 2070; Sept. p. 46. Barker & Williamson Audio Oscillator Model 210; July p. 32. Barker & Williamson Distortion and A.C. Volt Meter Model 410; Sept. p. 46. Bell Solid-State Receiver Imperial 1000; May p. 46. Bogen Cipher Denon 8000 Tape Recorder; Jan. p. 46. Clark Stereo Headphones Model 100; Feb. p. 40. Concord Tape Recorder Model 884; March p. 50. DynacoB & O Stereo Ribbon Microphone Model 200; June p. 37. Dynaco Stereo Control Amplifier SCA-35; March p. 52. EICO IM-Harmonic Distortion Meter Model 902W; Feb. p. 40. Electro-Voice Microphone Model 644; Oct. p. 112. Electro-Voice Speaker System Model Six; April p. 42. Empire Stereo Pickup Model 880-P; April p. 63. Fisher 3-Way Speaker System Model XP-10; March p. 54. Furn-a-Kit Equipment Cabinet Kit 2600 Series; March p. 56. Goodmans Loudspeaker System Maximus 1; Nov. p. 66. Harman-Kardon 1000 Series Tuner and Amplifier F1000T, A1000T; June p. 37. Harman-Kardon Transistorized Stereo Receiver Model SR-900; Oct. p. 88. Heathkit Regulated Power Supply Model IP-20; Sept. p. 48. James B. Lansing "Olympus" Speaker System Model C-50; June p. 37. Magnecord Stereo Tape Recorder Model 1024-HF; Nov. p. 66. McIntosh FM-Stereo Tuner Model MR67; Feb. p. 38. OKI Stereo Tape Recorder Model 555; Oct. p. 90. PML Condenser Microphone Model EC-61; March p. 56. RCA Ribbon Microphone Model SK-46; July p. 34. H. H. Scott FM-Stereo Tuner-Amplifier Model 340-B; Jan. p. 45. H. H. Scott Solid-State FM-Stereo Tuner Model 312; July p. 32. Shure Stereo Cartridge V-15, May p. 48. Stanton Stereotable System, Model 800B Jan. p. 44. Thorens Automatic Turntable TD-224; May p. 48. Uher Portable Recorder Model 4000 Report-S; April p. 38. Weathers FANTASY Basic Questions and Answers; Christopher Faye. Feb. p. 36. Hi Fi and the British; Alan Watling. June p. 53. Hi Fi and the British: Privacy; Alan Watling. Sept, p. 38.

Automobile Tape Cartridges, Larry Zide. May, p. 66 Build a Mixer-Meter Amplifier, Hal Magargle, Dec. p. 23 Build a Solid-State Stereo Limiter, Wayne B. Denny. Sept. p. 25 New NAB Magnetic Tape Standards, Herman Burstein. Pt. 1, July, p. 17; Pt. 2, Aug. p. 22; Pt. 3, Sept. p. 38; Pt. 4, Oct. p. 92; Pt. 5, Nov. p. 44; Pt. 6, Dec. p. 48 Tape Recorder Directory. Dec. p. 34 Why Look-Alike Recorders Can Be $$$ Apart, Herman Burstein. Dec. p. 26
Sound & Decor Styles (a series) Feb. p. 6; Apr. p. 36; May p. 61; July p. 32; Oct. p. 42; Dec. p. 68. DIRECTORIES ACOUSTICS A Creek Theatre (circa 1968), Don Davis. Sept. p. 30. Small Music Rooms, Michael Rellinger. Oct. p. 25. Altec Acousta Voicing, Don Davis. Nov. 21; Dec. p. 36. AMPLIFIERS Electronic Crossover Networks Revisited, C. G. McProud. July p. 21. How to Build a Three-Channel Electronic Crossover. C. G. McProud. Feb. p. 19. Letters and corrections, Apr. p. 10. How Negative Feedback Affects Amplifier Performance, Norman H. Crowhurst. I, Feb. p. 38; II, Mar. p. 30; III, Apr. p. 42; IV, May p. 30; V, June p. 32. The Truth About Stereo Power Amplifier Ratings. Ralph Hartz and Fred Kamp. Apr. p. 19. BACKGROUND MUSIC SCAPrivate Music On Public FM, Leonard Feldman. Sept. p. 23. How to Build a Background Music Adapter, Leonard Feldman. Oct. p. 34. BASIC HI-FI Expand Your Hi-Fi Reference Library. Dec. p. 18. 20 Most-often-asked Questions on Hi-Fi, Leonard Feldman. Dec. p. 28. BROADCAST STUDIOS Audio Testing in, Fred L. Zellner. Nov. p. 54. CONSTRUCTION Build A Presence Control, Al Fanning. Dec. p. 60. Build a Background Music Adapter, Leonard Feldman. Oct. p. 34. Build a Sheet-Metal Reverberator, Robert Ehle. Apr. p. 28. Custom Home Stereo Installation, Michael J. Curry. June p. 24. Electronic Crossover Networks Revisited, C. G. McProud. July p. 21. Further Advenures of a Sound Purist, John W. Linsley Jan. p. 19. Hello (Equipment) Dolly, James P. Holm. June p. 28. How to Build a Low-Voltage Remote OnOff Switch, L, B. Keim. Aug. p. 21. How to Build a Three-Channel Electronic Crossover, C. C. McProud. Feb. p. 19. Letters and corrections, Apr. p. 10. DECOR Custom Home Stereo Installation, Michael J. Curry. June p. 24. Eye-Fidelity, Jerry Joseph. Oct. p. 44. Product Preview, Annual. August issue. Professional Directory. Nov. p. 38. Speaker System Buying Guide. Mar. p. 42. ELECTRONIC ORGANS How Organs Work, Norman H. Crowhurst, Sept. p. 26. How They Produce Dfferent Sounds, Norman H. Crowhurst, Oct. p. 52. How Constructed, Norman H. Crowhurst, Nov. p. 76. Voicing Methods, Norman H. Crowhurst, Dec. p. 64. EQUIPMENT PROFILES AKG Stereo Headphones. July, p. 40. AR Integrated Stereo Amplifier. Apr. p. 54. AR Speaker System, AR-3a. Oct. p. 72. Altec 711B FM Stereo Receiver. Sept. p. 40. Ampex Micro 85 Stereo Cassette Recorder/ Player. Mar. p. 60. BSR McDonald 600/M44E "Total Turntable." June, p. 40. Benjamin 1050 Compact Music System. Oct. p. 74. Bose 901 Speaker Systems [see "Behind the Scenes," Dec. p. 10.] Crown CX-822 Professional Tape Recorder. Apr. p. 48. Dual 1015 Automatic Turntable. Sept. p. 46. Electro-Voice RE-15 Dynamic Cardioid Microphone. Mar. p. 64. Electro-Voice Five-A Loudspeaker System. Sept. p. 42. Elpa PE-2020 A u t o m a t i c Turntable. May, p. 42. Erath Models I and VI Loudspeaker Systems. Nov. p. 60. Fisher 200T FM Stereo Receiver. July, p. 36. Garrard SL95 Automatic Turntable. Apr. p. 57. Hammond M100 Condenser Microphones. Jan. p. 46. Harman-Kardon Five-Twenty FM Stereo Receiver. May, p. 34. Heathkit TOA-67-1 Organ "Bandbox." July, p. 42. JBL SE400S "Energizer" Stereo Power Amplifier. Dec. p. 54. Jensen TF-3B Bookshelf Speaker System. June, p. 42. KLH Twelve Loudspeaker System. July,

Nothing New Under the AM Sun., Michael N. Stosich, Jan., 59. Wags and Tales That Started a Revolution, Oliver Berliner, Dec., 36. Edison Tin-foil Phonograph, Dr. Peter E. Hillman Ph.D., Dec., 60. Loudspeakers Power Amplifiers and the Loudspeaker Load, Jeffrey H. Johnson, Aug., 32. The Search for an Optimum Transmission-Line Speaker, W.J.J. Hoge, Aug., 44, Nov., 34. Time Alignment in Loudspeakers, Edward M. Long, Aug., 58. Modulation Distortion in Loudspeaker Systems, Stephen Kurtin, Dec., 54. Microphones Miking the Pro Way, Howard A. Roberson, Nov., 40. The Compleat Microphone Evaluation, Jon Sank, April, 48. Movie Sound Movie Sound Reproduction, John K. Milliard, March, 44. Music lohn CageMusical Radical, David D. Spitzer, Sept., 40. Noise Build a Low Noise Preamp With Weighting Filters, M.J. Salvati, May, 38. Fighting Distortion on Tape, Wayne Saylor, April, 34. Phono Cartridge Noise, John Maxwell, March, 40. Pink Noise Filter, Dr. Robert Mauro, March, 36. Remedying R.F. Interference, Joseph Ciovanelli, Jan., 24. Phono Cartridge Phono Cartridge Noise, John Maxwell, March, 40. Phonographs Do Turntables Effect Sound?, Joseph F. Grado, June, 36. Dynamic Range Requirements of Phonograph Preamplifiers, Tomlinson Holman, July, 72. Tonearm Design and Other Things, Joseph F. Crado, Aug., 28. Turntables & Noise, Joseph F. Crado, July, 22. Turntables, Part IV, Arm Cartridge Resonance, Joseph F. Grado, Oct., 30.

Things,

Turntables Do Turntables Effect Sound?, Joseph F. Grado, June, 36. Turntables & Noise, Joseph F. Grado, July, 22. Turntables, Part IV, Arm Cartridge Resonance, Joseph F. Grado, Oct., 30.
Dolby Noise Reducer, Geoffrey Shorter, May, 78. Dolby Noise Reducer, Part II, June, 114. Dolby Noise Reducer, Part III, July, 82. Cascode Amp March, 52. Design, Nelson Pass,
Hitachi SR-2004 Receiver, Nov., 92. JVC KD-85 Cassette Deck, Nov., 100. JVC QL-7 Turntable, Dec., 92. Janis Audio W-1 Subwoofer, June, 94. Kenwood KX-1030 Cassette Deck,
May, 64. Lenco C2003 Cassette Deck, Nov., 120. Lirpa "VDRS" Vehicular Disc Reproduction System, April, 71. Lux R-1120 Receiver, Aug., 70. Marantz 2500 Receiver, Feb., 64. Marantz 5030 Cassette Deck, Dec., 84. McIntosh C-27 Preamplifier, Sept., 78. Motorola TC 887 AX Car Radio & Cassette Player and EQB-3000 Equalizer/ Booster, July 51. Nakamichi CM-700 Microphone, Sept., 90. Nakamichi 730 Receiver, Dec., 74. Nakamichi T-100 Audio Analyzer, Nov., 128. Neumann fet-80 Microphone, Jan., 80. Onkyo A-7 Amplifier, Jan., 68. Optonica ST-3636 Tuner, Dec., 108. Panasonic CX-7100 Cassette Deck, CA9500 Tuner, and CH-3510, Booster, July, 64. Pioneer SX-1980 Receiver, Sept., 70. Pioneer TVX-9500 TV Tuner, Nov., 108. Project/One Mark IVB Receiver, April, 81. Realistic Sound Level Meter, Nov., 119. Sanyo FT-1490A Car Radio-Cassette Player, July, 56. Satin M-18 BX Phono Cartridge, Dec., 106. Scott CD-87R Cassette Deck, Aug., 82. Shure M615AS Analyzer System, July, 92. Sony PS-X6 Turntable, July, 86. Sony TC-K7II Cassette Deck, Aug., 76. Sparkomatic SR-48 Car Radio & Cassette Deck, July, 50. Spectro Acoustics 217 Preamplifier, Feb., 86. Stanton 881S Phono Cartridge, Nov., 105. Studer-Revox

Turntables Linear Tracking Turntables, Gary Stock. June, 48. Video JVC HR-6700U Videocassette Recorder (Equipment Profile), April, 56. Sony Profeel: "The Video Screen in Your Future," Leonard Feldman, May, 34. The Audio Interview: Todd Rundgren, Jon & Sally Tiven, Nov., 28.
Phono Cartridges More Than One Vertical Tracking Angle, Jon M. Risch and Bruce R. Maier, March, 21. The Phono Cartridge Electrical Output Network, Arnold Schwartz, March, 26.
Addendum John Marovskis Audio MIT-1 Phono Cartridge (Equipment Profile, Nov. 1981, 62), July, 49. AM Stereo: An FCC Fiasco!!, Leonard Feldman, July, 34. Antennas Try a Rhombic FM Antenna, Richard J. Kaufman. Jan., 24. Build the AM Superloop Antenna, Richard Modafferi, Jan., 30. Book Reviews The Complete Guide to Car Audio, July, 92. The Compleat Beatles, July, 92. The Rolling Stone Illustrated History of Rock & Roll, Aug., 46. Rock Record, Aug., 46. Radio Enters the Home, Aug., 46. MicrophonesAn Anthology of Articles from the Pages of the Journal of the Audio Engineering Society, Vol. 1-27, Sept., 88. The Complete Handbook of Videocassette Recorders, Nov., 89. How to Get the Most Out of Your Recording and Playback System, Nov., 89. Car Stereo Car Stereo Directory, July, 17. AM Stereo: An FCC Fiasco!!, Leonard Feldman, July, 34. Delco-GM/Bose: Wizardry on Wheels, Ivan Berger, Dec., 36. Cassettes & Cassette Decks New Cassettes TestedUpdate, Howard A. Roberson, March, 37. Tape Recorder Maintenance, Howard A. Roberson, April, 32. Basics of Magnetic Tape Performance, Howard A. Roberson, Sept., 28. Refocus on Demagnetization, Herman Burstein, Sept., 36. World's Most Expensive Cassette Deck: Nakamichi 1000ZXL Limited, Ivan Berger, Sept., 42. Christmas Buying Guide, Dec , 45.
Construction Projects Try a Rhombic FM Antenna, Richard J. Kaufman, Jan., 24. Build the AM Superloop Antenna, Richard Modafferi, Jan., 30. Crossovers for Subwoofer Biamping, Richard J. Kaufman, Aug., 28. Sub-Bass on a Budget, A. L. Newcomb, Aug., 36. Digital Equipment Hitachi PCM-V300 Digital Audio Recorder, June, 42. Sony PCM-F1 Digital Audio Processor, March, 48. Sony CDP-101 Digital Compact Disc Player, Nov., 36. Technics SV-P100 Digital Audio Cassette Recorder, April, 46. Directories Car Stereo Directory, July. Amps/Equalizers, 17; Radios/Tape Players, 20; Speakers, 25; Index of Manufacturers, 33. Annual Equipment Directory, Oct. Introduction, 31; Amplifiers, 33; Preamplifiers, 39; Tuners, 45; Receivers, 47; Turntables, 50; Loudspeakers, 56; Tonearms, 81; Phono Cartridges, 83; Open-Reel Tape Decks, 89; Cassette Decks, 91; Digital Recorders/Processors, 95; Microphones, 96; Headphones, 102; Equalizers, 106; Index of Manufacturers, 130. Son of Directory, Nov. Blank Tape, 30; Noise-Reduction Units, 32; Index of Manufacturers, 34. 1981 Annual Equipment Directory Addenda, Jan., 69. 1981 Car Stereo Directory Addenda, Jan., 72. Equipment Care Tape Recorder Maintenance, Howard A. Roberson, April, 32. Refocus on Demagnetization, Herman Burstein, Sept., 36. Equipment Profiles Ace Audio 3900 Ground Eliminator, Jan., 66. Ace Audio 4100 Filters, March, 63. ADC Sound Shaper SA-1 Real Time Analyzer, Sept., 50. Adcom Crosscoil XC/van den Hul MC Phono Cartridge, Jan., 63.

The New Chip Set: The Essence of the Magnavox ICs, Prasanna Shah, June, 76. Exclusive Test Report: Four DAT Recorders (Sony DTC-1000ES, Technics SV-D1000, Luxman KD-117 Prototype, and Mitsubishi Car Player Prototype), Leonard Feldman, July, 36. The R-DAT Standard, Leonard Feldman, July, 38. Forum: Unbalancing Act/Update (CBS Copy-code system), Leonard Feldman, Aug., 28. Do CDs Sound Different?, John Eargle, Nov., 62. Dithered Linearity CD Test Signals, Leonard Feldman, Dec., 110. Directories Car Stereo Directory, May. Amplifiers/Equalizers, 101; Compact Disc Players, 112; Radios/Tape Players, 114; Speakers, 121; Company Addresses, 144. Annual Equipment Directory, Oct. Introduction, 167; Compact Disc Players, 172; Digital Recorders/Processors, 184; Amplifiers, 186; Preamplifiers, 206; Tuners, 224; Receivers, 228; Turntables, 234; Tonearms, 240; Phono Cartridges, 244; Cassette Decks, 256; Open-Reel Tape Decks, 263; Blank Tape, 263; Microphones, 267; Headphones, 282; Equalizers, 288; Ambience & Surround-Sound Processors, 296; Signal Processors, 300; Crossovers, 302; Hi-Fi VCRs, 307; Loudspeakers, 310; Company Addresses, 449. Equipment Profiles/Auricles Accuphase DP-70 Compact Disc Player ("Auricle"), Dec., 128. ADS PQ10 ("8 Car Amps Tested"), May, 42. ADS CD4 Compact Disc Player, June, 108. Akai CD-A70 Compact Disc Player, June, 124. AR Powered Partners Active Speakers ("Auricle"), Feb., 88. AR Model X-10 Receiver, Dec., 96. Audio Control Richter Scale Series III Analyzer/EQ/Crossover, Dec., 116. Audio-Technica AT-9400 Stereo Microphone, Nov., 132. Audix UD-200S Microphone, June, 132. A.V.A. (Audio by Van Alstine) Transcendence 250 Series Two Amplifier, June, 118. Azden GM-P5L Cartridge, Jan., 104. Carver M-240 ("8 Car Amps Tested"), May, 42. CTI Astatic MF-100MR Cartridge, Sept., 105. dbx Soundfield Ten Speaker System, Jan., 84. Denon DX1, DX3, DX4, HD6 HD7, HD8, and HD-M ("Mass Cassette Test"), Nov., 50.
Electrocompaniet EC-1 Preamplifier, Nov., 118. Eminent Technology Tonearm 2 and Talisman Virtuoso B Cartridge, Feb., 80. EPI Stat 450 Speaker, Feb., 70. Forte Audio Model 1 Amplifier, Dec., 90. Fuji FR-I Super and FR-II Super ("Mass Cassette Test"), Nov., 50. Grado XTE + 1, Signature 8MX, and Signature MCX Cartridges ("Auricle"), June, 144. Hafler MA-1 ("8 Car Amps Tested"), May, 42. Hafler XL-280 Amplifier, Nov., 126. Harman/Kardon CA260 ("8 Car Amps Tested"), May, 42. Infinity MRA-150 ("8 Car Amps Tested"), May, 42. JVC RX-9V A/V Receiver, March, 68. Kyocera DA-710CX Compact Disc Player, Sept., 98. Mark Levinson No. 20 Mono Amplifie,. Aug., 62. Linear Power Model 1002 ("8 Car Amps Tested"), May, 42. Linn Axis Turntable, May, 74. Linn Basik LVX Tonearm and K9 Cartridge, Nov., 100. Luxman KD-117 Prototype ("Exclusive Test Report: Four DAT Recorders"), July, 36. Luxman LV-109 Integrated Amplifier, Sept., 72. Magnavox CDB650 Compact Disc Player, March, 60. Maxell XLI-S, XLII-S, and MX ("Mass Cassette Test"), Nov., 50. Memorex dBS, MRX I, HB II, HBX II, and CDX II ("Mass Cassette Test"), Nov., 50. Mission PCM-7000 Compact Disc Player, Aug., 80. Mitsubishi Car Player Prototype ("Exclusive Test Report; Four DAT Recorders"), July, 36. Monster Cable Alpha 2 Cartridge, April, 90. NAD 7220PE Receiver, Sept., 86. Nakamichi SR-3A Receiver Jan., 76. Nikko Gamma 30 Tuner, Jan., 110. Onkyo P-308 Preamplifier and M-508 Amplifier ("Auricie"), Sept., 112. Onkyo DT-2001 Digital Audio Tape Recorder, Dec., 78. Pioneer SA-V70 Amplifier, Jan., 98. Pioneer VSX-5000 A/V Receiver, June, 136. Proton D275 ("8 Car Amps Tested"), May, 42. Rane PE 15 Mono Equalizer April, 82. SAE A202 Amplifier, July, 58. Shure HTS5000 Surround Audio Processor, Feb., 60. Shure D6000 Compact Disc Player, April, 74. SKC GX, AX, QX, and ZX ("Mass Cassette Test"), Nov., 50. Sony DTC-1000ES ("Exclusive Test Report: Four DAT Recorders"), July, 36. Sony CDP-705ESD Compact Disc Player, July, 48. Sony HF, HF-S, UX, UX-S, UX-ES, UX-PRO, and Metal-ES ("Mass Cassette Test"), Nov., 50. Soundcraftsmen Pro-Power Four Amplifier, Sept., 78.

TDK D, DS-X, SD, SA, SA-X, MA, MA-X,
and MA-XG Cassettes, June, 38. Technics RS-DC10 DCC Recorder, April,
40. Video Acoustics Home Theater Loud-
man, Aug., 34. The Lowdown on Subwoofers, R. A. Greiner,
Aug., 38 (Addendum, Oct., 8). Quiet by Design, George Schulson, Sept.,
speaker System ("Auricle"), June, 90. Yamaha DSP-A2070 Digital Sound-Field Processing Amplifier, Sept., 44. HISTORY The Audio Interview: Henry Z. Steinway, D. W. Fostle, Jan., 52,
Memorex dBS, HBSII and CDX IV Metal Cassettes, June, 38. Metaxas Solitaire Amplifier, June, 62. Neumann KM 100 Microphone System,
LOUDSPEAKERS The Uneasy Truce Between Music & the Room, F. Alton Everest, Feb., 36.

Nov., 80.

Optimus DCT-2000 DCC Recorder, Jan.,
Mechanics Hall: Meetinghouse for Music, Rick Howland, Jan., 64. The Audio Interview: Eddie Kramer, Ted
Coloration of Room Sound by Reflections, F. Alton Everest, March, 30. Stereo for the Movies: The Center Channel, Tomlinson Holman, April, 26. Taking Up Resonance: Finding Room Modes on Your Computer, John Sehring, April, 32 (Addenda, May, 12, and June, 8). The Lowdown on Subwoofers, R. A. Greiner, Aug., 38 (Addendum, Oct., 8). Slide Tuning a Port Speaker, Harold Weinberg, Nov., 36. A Quest for the Audibility of Polarity, R. A. Greiner and Douglas E. Melton, Dec.,
Panamax Max 1000 Surge Protector and Line Conditioner ("Auricle"), June, 86. Paradigm Studio Monitor Loudspeaker, April, 52. Parasound HCA-2200II Amplifier, Aug., 42 (Addendum, Nov., 6). Philips DCC-900 DCC Recorder, July, 66. Pioneer DEH-M990DSP Car CD Player and Receiver, Sept., 64. PS Audio UltraLink D/A Converter, Aug.,
Fox, Feb., 24. The Audio Interview: Brian Eno, John Diliberto, March, 38. Behind the Scenes (25th anniversary of column), Bert Whyte, June, 30. The Audio Interview: Takeaki Anazawa, David Ranada, June, 56. Currents (RCA's Living Stereo reissue series), John Eargle, Aug., 28. The Audio Interview: Bruce Iglauer, Jonathan Poses, Sept., 26. The Audio Interview: Thomas Z. Shepard, Susan Elliott, Nov., 38. Savoy Jumps Again, Howard Mandel, Dec.,

Feb., 96. Monster Cable Light Speed 100 Toslink Digital Interconnect ("PlayBack"), July, 96. Monster Cable System Polarity Analyzer ("PlayBack"), Oct., 330. Musical Fidelity X-DAC D/A Converter, June, 58. Musical Fidelity X-CANS Headphone Amplifier ("PlayBack"), Nov., 124. NAD 512 CD Player and 314 Integrated Amplifier ("Auricle"), Feb., 66. NAD 118 Digital Preamplifier, Aug., 62. N.E.A.R. 15M Loudspeaker, June, 52. NHT 2.9 Loudspeaker ("Auricle"), Dec., 96. Nakamichi IA-1z A/V Integrated Amplifier, Dec., 58. Onkyo Integra A-9911 Integrated Amplifier ("PlayBack"), Aug., 96. Optimus Pro LX 10 Loudspeaker ("PlayBack"), Dec., 128. Panasonic DVD-A300 DVD Player, April,
38. Paradigm Mini Monitor Loudspeaker ("Front Row"), June, 30. Paradigm Reference Active/20 Powered Loudspeaker, ("Auricle"), Sept., 86 (Addendum, Nov., 13). Parasound R/EQ-150 Room Equalizer ("PlayBack"), Dec., 128. Pass Laboratories Aleph 1.2 Mono Amplifier ("Auricle"), July, 73. Pass Laboratories Aleph 2 Amplifier ("PlayBack"), Sept., 112.

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Threshold T800D Amplifier, Nov., 80. Toshiba SD-3006 DVD Player, July, 50. VLS Auri Headphone Surround Processor ("Auricle"), July, 70. VMPS FF-3 Loudspeaker ("Auricle"), March, 72. Velodyne F-1500R Powered Subwoofer ("Boom for the Buck"), Jan., 36. Velodyne F-1800RII Powered Subwoofer, March, 58. Velodyne VA-1215XII Powered Subwoofer ("PlayBack"), June, 96. Wadia 27 D/A Converter ("Auricle"), April, 70. Westlake Audio Lc 8.1 Loudspeaker ("PlayBack"), June, 96. Wheaton Triplanar Ultimate Tonearm ("PlayBack"), Feb., 96. Whirlwind Cable Tester ("PlayBack"), March, 96. Yamaha RX-V2092 A/V Receiver, Sept., 54. HISTORY Fast Fore-Word (reflections on Audio's origins), Michael Riggs, May, 8. Spectrum (PCM turns 50), Ivan Berger, May, 32. Glorious Beginnings: A Golden Anniversary Celebration of Audio's Earliest Years, David Lander, May, 45. Audio Milestones: The March of Technology, Ivan Berger, May, 59. 50 Years and More of Record Playing, Joseph Grado, May, 60. 50 Years of Amplifiers, Bascom H. King, May, 71. 50 Years of Home Recording, Robert Long, May, 76. 50 Years of Loudspeakers, Ken Kantor, May, 85. 50 Years of FolliesIdeas That Didn't Fly, Robert Long, May, 95. Through the Looking Glass (vintage ads), Michael Riggs, May, 103. The Future of Stereo, Floyd E. Toole, Part I, May, 126; Part II, June, 34. Spectrum (remembering mono), Ivan Berger, June, 20. Mondo Audio (EMI's 100th anniversary commemorative reissues), Ken Kessler, July, 28. Spectrum (collecting classic transistor radios), David Lander, Aug., 23. The Audio Interview: Sandy Berlin, David Lander, Aug., 36. Fast Fore-Word (25th anniversary of the

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Fast Fore-Word (DVD-Audio versus Super Audio CD), Michael Riggs, May, 4. Fast Fore-Word (96-kHz/24-bit recordings), Michael Riggs, July, 4. 96/24: Digital Heaven or Digital Hell?, Bob Katz (Digital Heaven), July, 26; Ken Kantor (Digital Hell), July, 27. 96/24 on DVD: First Impressions of the 96kHz/24-Bit Stereo Music DVDs from Chesky and Classic Records, Anthony H. Cordesman, July, 32. Spectrum (DNA assembly of electronic circuits), Ivan Berger, Sept., 20. Up Against the Wall: NXT's New Approach to Panel Speakers, Henry Azima, Sept., 34. Spectrum (MP3 audio compression standard), Stephan Somogyi, Nov., 20. Hot-Wiring Your Hi-Fi: How the IEEE-1394 Digital Interface Will Change Your Life, Mark Bridgwater, Nov., 28. EQUIPMENT REVIEWS ATI (Amplifier Technologies, Inc.) AT1505 Five-Channel Amplifier, March, 54. Adcom The Ball Remote-Controlled Home Theater System ("Auricle"), May, 60. Arcam Alpha 9 Integrated Amplifier, Jan., 54. Audio Research VT-200 Amplifier and REF 1 Preamplifier ("Auricle"), March, 70. Audio Research VT50 Amplifier ("Auricle"), Aug., 60. Audiolab 8000S Integrated Amplifier ("Front Row"), March, 26. AudioQuest PT-6 Tonearm and VPI Aries Truntable ("Auricle"), May, 66. B & K Components AVP1030 A/V Tuner/ Preamp, Feb., 54. BDI Ventura Audio+Video Equipment Rack ("PlayBack"), Dec., 104, Basis Audio 2000 Turntable ("Auricle"), June, 68. BayGen Freeplay FPR2S AM/FM Portable Radio ("PlayBack"), Dec., 104. Bel Canto Design SET 40 Amplifier, Nov., 46. Bell'Oggetti SSP-12A Surround Speaker Stands ("PlayBack"), June, 88. Boston Acoustics Voyager Outdoor Speaker ("Seven Outdoor Speakers"), Sept., 42. Bryston B-60 Integrated Amplifier, March, 58. Carver DD-5.1 Dolby Digital Preamp/ Processor ("PlayBack"), Oct., 298. Cinepro 3k6SE Six-Channel Amplifier ("Auricle"), Jan., 82.
Classe Audio CAP-80 Integrated Amplifier and CDP.3 CD Player, Aug., 48. Clearaudio Signature Phono Cartridge ("PlayBack"), Sept., 104. dCS Elgar 96-kHz/24-Bit D/A Converter ("Auricle"), July, 54. Delos DVD Music Breakthrough Dolby Digital DVD ("PlayBack"), Oct., 298. Denon DMD-1000 MiniDisc Recorder, Dec., 45. Dunlavy Audio Labs SC-III Speaker, July, 50. EAD (Englightened Audio Designs) TheaterMaster Encore and Ovation A/V Preamps, Nov., 52. Energy Tempest Outdoor Speaker ("Seven Outdoor Speakers"), Sept., 42. Energy Take 5 Home Theater Speaker System ("Auricle"), Sept., 80. Ergo AMT Headphones ("Auricle"), Dec., 72. FMR Audio Really Nice Compressor ("Front Row"), Sept., 28. Fostex COP-1 Digital Signal Converter ("PlayBack"), April, 96. FurnitureWorks 300AH Speaker Stands ("PlayBack"), Sept., 104. Genesis 300 Speaker ("Auricle"), Feb., 72. GRAAFiti VT5.35 Five-Channel Amplifier ("Auricle"), Nov., 84. Grado Reference Platinum Phono Cartridge ("PlayBack"), Feb., 96. Grado SR325 Headphones ("PlayBack"), June, 88. Grundig G-2000A AM/FM Short-Wave Radio ("PlayBack"), Feb., 96. Hsu Research TN 1220 HO Subwoofer, Aug., 44. Infinity Compositions Overture 3 Speaker, Feb., 42 (Addendum, June, 8). Infinity Compositions Overture 1 Speaker and Compositions CC-3 Center-Channel Speaker, Feb., 47. JBL Harmony Radio/CD Player ("PlayBack"), June, 88. JBL HLS610 Speaker ("Auricle"), Nov., 74. JVC XV-D2000BK DVD Player, March, 48. Jadis DPL2 Preamplifier ("Auricle"), Sept., 86. Jolida SJ-801A Integrated Amplifier, Jan., 70. Klipsch KSF 10.5 Speaker, April, 52. Kora Electronic Concept Triode 100 SB Mono Amplifier and Eclipse Preamplifier, Nov., 68. Koss Quiet Zone 2000 Headphones ("PlayBack"), April, 96. Krell KAV-500 Multichannel Amplifier ("Auricle"), July, 58.